Quakes an Odd Thing on the California Nevada Border

Something A Bit Strange Is Happening

Just north of Mammoth “Lakes” (a supervolcanic site in California) and located about where the subducted spreading zone from the East Pacific Rise is slowly pulling California apart (making Death Valley and the Salton Sea basin in the process) we have this odd set of quakes. I’d brush it off as just a grabben settling, except it’s come back for a ‘double dip’. About a week ago we had a 4.x scale quake and a bunch of aftershocks, now this:

Quakes 15 April 2011 Calif 32.42.-125.-115

Quakes 15 April 2011 Calif 32.42.-125.-115

That is a static image, as is this following close-up:

Quakes 15 April 2011 CalNeva 37.39.-120.-118

Quakes 15 April 2011 CalNeva 37.39.-120.-118

UPDATE 16 APRIL 2011:

Notice that in this image, the total quake count is 233 while yesterday it was 163. We are racking up new quakes (even if very small ones) at a prodigious rate…

Quakes 16 Aprl 2011 CalNeva 37.39.-120.-118

Quakes 16 Aprl 2011 CalNeva 37.39.-120.-118

End Update

OK, it most likely IS just some minor block settling. But why?. IMHO, because we’re getting a bit more “spreading” in that Basin and Range type of geology from that spreading zone. There has been more activity all along that spreading zone (especially near Mexico and on up into Southern California) and it is, IMHO, just wandering on up the line.

And after some more spreading, we get more quaking. The stresses accumulate at the margin where the “jello wedge” of central California is stuck onto the side of the continental North American Plate, but hanging out over the subducted Pacific Plate, and that resolves into “slippage” on the fault system that runs… Right Past Me.

You can see that as all the activity along the San Andreas starting down near L.A. and heading up to Hollister. Then it takes a turn inland a bit and heads up the line of the Hayward / Calaveras system (eventually it gets the name Rodgers Fault on the other size of San Pablo bay) and on up past The Geysers and Calistoga (mineral waters and hot volcanic baths…) You can see a nice image of how they connect and a simulation of what happens if they both “go” at the same time here:

http://earthquake.usgs.gov/regional/nca/simulations/hayward/M7.2.php

IMHO, something like that is the most likely scenario (or taking it in two pieces, each fault one at a time) in the next couple of decades in the San Francisco Bay Area. “Any time now” in geologic terms.

Here is a live chart of California for keeping up with “What’s happening now”:

California Map

Action Closer to Me

As I live in California, it makes it easier for me if I keep them in the list where I can see what’s shaking near me.

Current quake map in California

Current quake map in California

Original Image, with captions and description. The original is interactive with clickable regions for ‘close ups’.

While we had a spot count over 300 on this one chart during the “supermoon” it’s now over 574 as I type.

Here is an alternative view of things with the fault lines highlighted:

California Quakes with fault lines

California Quakes with fault lines

Original Image

OK, so is this an indication that we’ve got an increase in the volcanic part of things? Action near spreading centers where we get big volcanos? Well, just as a reminder, Iceland is continuing to build up a “cumulative seismic moment”:

Grimsvoten Cumulative Seismic Moment

Grimsvoten Cumulative Seismic Moment

Original Image

This is from the Iceland Met Office. Main page: English or Icelandic (At least, it looks like Icelandic to me..)

North America

North America and Mid Atlantic Ridge Quake Map

North America and Mid Atlantic Ridge Quake Map

Original with clickable details

And remember, I have a dedicated CSZ page with closeups

Asia and Russia

h/t Chuckes in comments: Not seeing anything in the area, but as we’ve had a big volcanic “blow” in Kamchatcka, here is the Asia chart:

Asia Quake Map

Asia Quake Map

Original Image with clickable areas

Japan

While we don’t want to forget about Japan, it has very much quieted down. So just one panel. If you want more detail, see:

https://chiefio.wordpress.com/2011/03/14/quakes-japan-upgraded-to-9-0/

Quakes, Japan close up, More North

Quakes, Japan close up, More North

Original With Clickable Areas

Australia / New Zealand

This is a map of the Australia / Indonesia / New Zealand area:

Australia / Indonesia / New Zealand Quake Map

Australia / Indonesia / New Zealand Quake Map

Original with clickable regions to zoom in

Facinating line of “small ones” along the Indonesian arch and out toward Fiji / Tonga…

South America

Here is a “live view” of South America so you can watch anything “new” that develops there:

Southern South America Hemispheric View

Southern South America Hemispheric View

South America with “clickable” areas for more details.

Southern Hemisphere

A view of Earthquakes from the South Pole

A view of Earthquakes from the South Pole

Original Image with Clickable Details

Northern Hemisphere

North Polar Earthquake Map

North Polar Earthquake Map

Original Image with Clickable Details

Reminder

After some bouncing up and down as they screwed around with the graphs, the Grimsvoten graph is back to normal. But now it’s showing the total energy line almost matching the 2004 point of eruption. It’s time to start watching closely to see if this seismic metric has any predictive power. IMHO, it could be off by up to 50% as a guess, so I’m not holding my breath. Then again, I’d not plan a camping trip to the volcano right now either…

The line of total seismic energy at Grimsvoten in Iceland is continuing it’s very vertical climb… I think Iceland will be “sooner rather than later”… IMHO, we hit “equal to last time” in about a month. The question of what happens then is still an open one, but it is a ‘watch here’ flag…

Take a look again at the Iceland Volcano Watch Metric posting. The total seismic energy line continues to go ever more vertical.

Some Volcano Stuff

This page:

http://pangea.stanford.edu/~dsinnett/Pages/Links.html has a nice collection of links to volcano monitor pages. Just click the pictures for the different volcano observatories.

The Smithsonian page:

http://www.volcano.si.edu/reports/usgs/

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About E.M.Smith

A technical managerial sort interested in things from Stonehenge to computer science. My present "hot buttons' are the mythology of Climate Change and ancient metrology; but things change...
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43 Responses to Quakes an Odd Thing on the California Nevada Border

  1. Chuckles says:

    http://ncwatch.typepad.com/media/2011/04/ready-for-some-cooler-weather.html

    There has been a strong explosive eruption of the Bezymianny volcano on Kamchatka Peninsula last night raising the alert code to RED for the region.

    Preliminary reports indicate the ash billowing to least to 33,000 feet. The volcano’s activity could affect international and low-flying aircraft, and climate according to experts.

  2. George says:

    I’m trying to test something here:

  3. George says:

    I also note a lot of smaller cones in that same general area. That entire region from Long Valley all the way up to Fallon has been fairly active even within the past couple thousand years. The last major eruptions were South of Mono Lake only about 600 years ago or so.

    A volcanic eruption anywhere in that area East of the Sierra Nevada should not be considered surprising and can happen at any time.

    The last eruptions up around Soda Lake near Fallon were only about 1000 years ago.

  4. E.M.Smith says:

    I think I remember Kamchatca having had a bunch of quakes a couple of years back…

    Bing! Bing! Bing!

    http://en.wikipedia.org/wiki/2006_Kamchatka_earthquakes

    The 2006 Kamchatka earthquakes were a series of powerful earthquakes that started on April 20, 2006 at 23:25 UTC (April 21, 2006 at 12:25 PM local time) as a major quake with the magnitude of 7.6 on the Richter scale. The epicenter was located near coast of Koryak Autonomous Okrug at 61.075°N, 167.085°E at an estimated depth of 22 km, as reported preliminarily by the USGS. This major quake caused damages in three villages and was followed by a number of aftershocks ranging in magnitude from 4.3 to 5.1.

    The next strong 6.6 temblor struck on Saturday, April 29 at 16:58 UTC (April 30, 2006 at 5:58 AM local time). It too was followed by a number of strong and medium quakes days after with the magnitude ranging from 4.3 to 5.0.

    These earthquakes claimed no deaths; however, 40 people were reported injured and about 1,000 people were since evacuated. Several diesel electric power stations and block and concrete buildings sustained damage.

    Interesting:

    http://en.wikipedia.org/wiki/Kamchatka_earthquakes

    Three Kamchatka earthquakes, which occurred off the coast of Kamchatka Peninsula in far eastern Russia in 1737, 1923 and 1952, were megathrust earthquakes and caused tsunamis. They occurred where the Pacific Plate subducts under the Okhotsk Plate at the Kuril-Kamchatka Trench. The depth of the trench at the point of the earthquakes is 7,000–7,500 meters. Northern Kamchatka lies at the western end of the Bering fault, between the Pacific Plate and North American Plate, or the Bering plate There are many more earthquakes and tsunamis originating from Kamchatka, of which the most recent was the 1997 Kamchatka earthquake and tsunami originating near the Kronotsky Peninsula.

    1737… and we had those other “1700 ish” quakes from megathrust on the northern pacific plate…

    https://chiefio.wordpress.com/2011/03/15/1707-hoei-49-days-fuji/

    Hmmmm….

    1737 earthquake

    The epicentre of the 1737 earthquake was located at 52.5°N 159.5°E. This earthquake occurred at a depth of 40 km. A magnitude of 8.3 Ms has been estimated.

    So an 8.x about the same time on the same chunk of plate.

    But what about recently?

    1923 earthquakes

    On February 4, 1923, an estimated magnitude 8.3–8.5 Mw earthquake with an approximate location of 54.0°N 161.0°E triggered an 8 meter tsunami that caused considerable damage in Kamchatka, with a number of reported deaths. The tsunami was still 6 meters high when it reached Hawaii, causing at least one fatality. There was another earthquake and tsunami in April 1923, which caused locally high tsunami runup near Ust’ Kamchatsk, leaving a deposit studied by Minoura and others.

    1952 earthquake

    The main earthquake struck at 16:58 GMT (04:58 local time) on November 4, 1952. Initially assigned a magnitude of 8.2, the quake was revised to 9.0 Mw in later years.[ A large tsunami resulted, causing destruction and loss of life around the Kamchatka peninsula and the Kuril Islands. Hawaii was also struck, with estimated damages of up to US$1 million and livestock losses, but no human casualties were recorded. Japan also reported no casualties or damage. The tsunami reached as far as Alaska, Chile, and New Zealand.

    The hypocentre was located at 52.75°N 159.5°E, at a depth of 30 km. The length of the subduction zone fracture was 600 km. Aftershocks were recorded in an area of approximately 247,000 km2, with epicenters at depths of between 40 and 60 km. A recent analysis of the tsunami runup distribution based on historical and geological records give some indication as to the slip distribution of the rupture.

    So we had one “recently” on geologic time scales at “only” 60 years ago… then again, it followed one that was only 30 years before it…

    Don’t know if I ought to be relaxed as the 1952 “must have taken care of it” or anxious as it’s looking like a “One Two Three” pattern of Japan, Kamchatka and Cascadia.

    Strange place this planet…

  5. E.M.Smith says:

    @George:

    While it ought not to be considdered unusual or out of the ordinary (as in geological time 600-1000 years ago is about 1/1000th an eyeblink…) the fact is that if we were to sprout an Active Volcano right there, a whole lot of folks will get very excited, very quickly… (Including me ;-) … now where did I pack that ‘disposo-camera’… 8-0

  6. George says:

    Oh, no doubt I would want to snap a picture from Tioga pass! But folks should consider that area an active volcanic field.

  7. Scarlet Pumpernickel says:

    :P http://www.presseurop.eu/en/content/article/602251-heavy-cloud-forecast-europes-single-sky

    Though the central volcano in Iceland erupts all the time and doesn’t always cause airplane problems…

  8. steve says:

    By the way, Hawthorn is where our military makes and stores much of their ordinance – Boom!

  9. E.M.Smith says:

    Taiwan gets a 5.7 … Foreshock?

    Magnitude 5.7 – NORTHEAST OF TAIWAN
    2011 April 16 01:11:10 UTC

    This event has been reviewed by a seismologist.Magnitude 5.7
    Date-Time Saturday, April 16, 2011 at 01:11:10 UTC
    Saturday, April 16, 2011 at 10:11:10 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 25.393°N, 124.019°E
    Depth 131.9 km (82.0 miles)
    Region NORTHEAST OF TAIWAN
    Distances 111 km (68 miles) N of Ishigaki-jima, Ryukyu Islands, Japan
    235 km (146 miles) ENE of Su’ao, Taiwan
    254 km (157 miles) E of TAIPEI, Taiwan
    1235 km (767 miles) NNE of MANILA, Philippines
    Location Uncertainty horizontal +/- 13.7 km (8.5 miles); depth +/- 7.3 km (4.5 miles)
    Parameters NST=345, Nph=371, Dmin=144.7 km, Rmss=1.2 sec, Gp= 25°,
    M-type=regional moment magnitude (Mw), Version=8
    Source USGS NEIC (WDCS-D)
    Event ID usc0002sqf

  10. P.G. Sharrow says:

    That thing southwest of Hawthorn appears to be a flow lava vent. Maybe it needs to take a leak soon! pg

  11. George says:

    It is Mud Springs volcano and is described as “late Pleistocene”. The larger one to its Southwest is Aurora Crater and is much older.

    But other references mention “late Holocene” cinder cones and basalts in that volcanic field.

  12. George says:

    Click to access WesnouskyinJSG%202005.pdf

    Another idea. A fault system is forming on the East side of the Sierra that will replace the San Andreas as the primary expression of the right-lateral transform between North American and Pacific plates.

  13. E.M.Smith says:

    Odd… two quakes, both 5.2, both about the same time (within a 20 minute window), one in Australia, one in New Zealand.

    Magnitude 5.2 – SOUTH ISLAND OF NEW ZEALAND
    2011 April 16 05:49:22 UTC

    This event has been reviewed by a seismologist.Magnitude 5.2
    Date-Time Saturday, April 16, 2011 at 05:49:22 UTC
    Saturday, April 16, 2011 at 05:49:22 PM at epicenter
    Location 43.626°S, 172.837°E
    Depth 9.2 km (5.7 miles)
    Region SOUTH ISLAND OF NEW ZEALAND
    Distances 16 km (10 miles) ESE (122°) from Christchurch, New Zealand
    229 km (142 miles) SSE (155°) from Westport, New Zealand
    306 km (190 miles) SSW (211°) from WELLINGTON, New Zealand
    Location Uncertainty horizontal +/- 11.8 km (7.3 miles); depth +/- 4.4 km (2.7 miles)
    Parameters NST= 42, Nph= 46, Dmin=17.8 km, Rmss=0.98 sec, Gp=184°,
    M-type=body wave magnitude (Mb), Version=4
    Source U.S. Geological Survey, National Earthquake Information Center:
    World Data Center for Seismology, Denver
    Event ID usc0002su1

    Magnitude 5.2 – QUEENSLAND, AUSTRALIA
    2011 April 16 05:31:19 UTC

    This event has been reviewed by a seismologist.Magnitude 5.2
    Date-Time Saturday, April 16, 2011 at 05:31:19 UTC
    Saturday, April 16, 2011 at 03:31:19 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 20.034°S, 147.659°E
    Depth 10 km (6.2 miles)
    Region QUEENSLAND, AUSTRALIA
    Distances 124 km (77 miles) SE of Townsville, Queensland, Australia
    145 km (90 miles) E of Charters Towers, Queensland, Australia
    991 km (615 miles) NW of BRISBANE, Queensland, Australia
    1697 km (1054 miles) N of CANBERRA, A.C.T., Australia
    Location Uncertainty horizontal +/- 17.4 km (10.8 miles); depth +/- 3.3 km (2.1 miles)
    Parameters NST= 45, Nph= 49, Dmin=146.9 km, Rmss=0.92 sec, Gp= 76°,
    M-type=body wave magnitude (Mb), Version=6
    Source USGS NEIC (WDCS-D)
    Event ID usc0002stu

    @George:

    My take on it is simpler, but the same in concept:

    The “middle California Jello Wedge” that is laying on the Pacific Plate but stuck to the North American Plate is going to stick to the pacific plate and break off of the North American plate.

    It’s sliding on the bottom right now as things are “lubed up” from a long time slipping, but at some point the bottom sticks, and the break moves inland. As inland has thinned, the “stickage” is ever less….

  14. George says:

    I was actually quite surprised at how much of the total right slip transform the Walker Lane was accounting for. It is the significant percentage of the total. And when you look at things like the Owens Valley quake that was nearly an M8, it certainly makes me go hmmm.

  15. pascvaks says:

    “Time” is a terrible thing! I mean, think about it, we have nanosceonds, picoseconds, and regular old “people” seconds, then there’s the big ones like geo-seconds and galactic seconds and universe seconds. “Time” is a mess!

    When a geologist says something’s going to happen soon, people can live a few generations or a lot more before anything quakes or erupts. It’s disgusting! Every time I look as a picture of a galaxey I have to pinch myself and say, “Self, that thing is spinning!”

    Getting a handle on “time” is a BIG problem. I don’t think we’re going to do it anytime soon. (I mean, anytime in people-time soon;-)

  16. Scarlet Pumpernickel says:

    Korea has a giant volcano on the border. One of the biggest explosions in the last 2000 years happened there.

  17. Scarlet Pumpernickel says:

    That earthquake in Australia, close to old volcanic structures?

    http://www.largeigneousprovinces.org/07aug

  18. E.M.Smith says:

    Added another one next to the first two in Nevada:

    Magnitude 4.1 – NEVADA
    2011 April 16 09:46:32 UTC

    This event has been reviewed by a seismologist.Magnitude 4.1
    Date-Time Saturday, April 16, 2011 at 09:46:32 UTC
    Saturday, April 16, 2011 at 02:46:32 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 38.286°N, 118.221°W
    Depth 10.6 km (6.6 miles)
    Region NEVADA
    Distances 11 km (7 miles) WNW (282°) from Tonopah Junction, NV
    25 km (15 miles) S (188°) from Luning, NV
    27 km (17 miles) E (95°) from Qualeys Camp, NV
    44 km (27 miles) SE (127°) from Hawthorne, NV
    285 km (177 miles) E (95°) from Sacramento, CA
    Location Uncertainty horizontal +/- 3.2 km (2.0 miles); depth +/- 2.4 km (1.5 miles)
    Parameters NST= 14, Nph= 16, Dmin=46.3 km, Rmss=0.19 sec, Gp=191°,
    M-type=local magnitude (ML), Version=7
    Source Seismological Laboratory, University of Nevada, Reno
    Event ID nn00333335

    @Pascvaks:

    This isn’t the time to bring up time as I’ve no time for it ;-)

    I mean really, it’s not like I’m not busy enough, if I start thinking too much about time I’ll lose all track of time then it will seem like time is just flying by and then I’ll not have the right time perspective on time, since our sense of time is so out of time with time…. or something…

    @scarlet Pumpernickel:

    Looking at the chart of “late volcanics” in your link, the quake is just south east of Townsville and so is a recent “alkaline volcanic” splotch. Looks like it is a volcanic arc to me…

    @George:

    I presume you mean “THE Great California Quake” (before we had to start saying which one ….

    http://www.seismo-watch.com/EQSERVICES/NotableEQ/Mar/0326.1872.OwensValley.html

    According to John Muir, who was in a cabin in Yosemite Valley on March 26, 1872, it was a clear moon lit morning when the strong shaking began. Muir wrote the earthquake struck at about 2:30 a.m. and it was later estimated to have measured about M7.6 – M8.0. Muir ran from his cabin and had trouble standing as the Earth was violently thrown from side to side, and up and down.
    […]
    Reports from the epicentral area were not as inspiring as Muir’s. Shaking from the event was intense, registering X-XI on the Modified Mercalli scale (a relative shaking intensity rating from 1-12 and shown in Roman numerals). The severe ground motion devastated the town of Lone Pine, where of a population of 300 people, 27 were killed, and 52 of 59 structures were destroyed.
    […]
    Extensive and specular discontinuous surface fault ruptures occurred for over the course of 76 miles, from just south of Owens (Dry) Lake near Haiwee Reservoirs, to a little north of Big Pine (See Fault Rupture Map – 104k). The type of fault movement was normal-slip, the west (Sierra) side up, with a slight right-lateral strike-slip motion. Maximum off-sets measured 23 feet vertical and up to 22 feet horizontal and the scarps can still be seen today. Notice the height difference between the two men in the pictures above (click on the images to enlarge).

    It is California’s strongest historical earthquake away from the San Andreas fault, and until the San Francisco earthquake in 1906, the Owens Valley 1872 earthquake was considered California’s “great” earthquake.

    So about 10% of the population of the town killed and almost all buildings distroyed. (There is a nice description of dust being tossed into the air that I’ve left out of the quotes) and a general mess of things…

    And IT was “the great earthquake”…

    Yeah, that makes me go “hmmmm”.

    http://www.seismo-watch.com/EQSERVICES/NotableEQ/Mar/0326.1872.Photo1.html

    Has a nice picture of two guys, one on each side of the rupture, showing the “rise”… (or sink… not sure which)

    Yeah, I’d watch that line from the Salton Sea all the way up the Death Valley / Owens Valley area past Mammoth “Lakes” and into the Mono Lakes volcanic area Really Closely… Oh, wait, I already do 8-)

    IMHO we are slowly breaking off a large chunk of California and putting it on top of the Pacific Plate on the western side of the subducted East Pacific Rise spreading zone. Just like sliding a piece of pie off the serving plate onto our own personal plate… only a whole lot slower :-}

    That, to me, says that while the San Andreas is intersting (and I live near it so it’s very interesting for short periods of time ;-) the real “action” longer term is more inland.

    From the wiki:

    http://en.wikipedia.org/wiki/1872_Lone_Pine_earthquake

    The quake was felt strongly as far away as Sacramento, where citizens were startled out of bed and into the streets. Giant rockslides in what is now Yosemite National Park woke naturalist John Muir, then living in Yosemite Valley, who reportedly ran out of his cabin shouting, “A noble earthquake!” and promptly made a moonlit survey of the fresh talus piles. This earthquake stopped clocks and awakened people in San Diego, California, to the south, Red Bluff, California, to the north, and Elko, Nevada, to the east. The shock was felt over most of California and much of Nevada. Thousands of aftershocks occurred, some severe.

    Things felt from San Diego to Sacramento / Red Bluff are just huge… Notice in this next bit that there are at least 2 fault involved.

    The quake resulted from sudden vertical (15–20 feet/4.5–6 m) and right-lateral (35–40 feet/10.6–12.2 m) movement on the Lone Pine Fault and part of the Owens Valley Fault. These faults are part of a twin system of normal faults that run along the base of two parallel mountain ranges; the Sierra Nevada on the west and Inyo Mountains on the east flank of Owens Valley. This particular event created fault scarps from north of Big Pine, California, (55 miles/88 km north of Lone Pine), to Haiwee Reservoir (30 miles/48 km south of Lone Pine).

    Researchers later estimated that similar earthquakes occur on the Lone Pine fault every 3,000-4,000 years. However, the Lone Pine fault is only one of many faults on two parallel systems of faults mentioned above.

    This earthquake also formed a small graben that later was filled by water, creating 86-acre (350,000 m2) Diaz Lake.[1]

    Many geoscientists who have studied the area theorize that quakes similar to the 1872 Lone Pine event are responsible for creating Owens Valley (see Basin and Range Province for ideas on what triggers these quakes).

    So just how many quakes like that does it take to make the Owens valley? And what does that imply about “how often”?

    We’re slowly ripping apart and that comes with a load of rock movement. That then implies quakes.

    But don’t worry, we’re only unzipping down to the mantle right next to a supervolcano… nothing to see, move along move along… ignore that hissing sound and the smoke and the hot water and that wobbly feeling you have is normal….

  19. George says:

    And again, if you look just a little Southwest of the existing quake, there is an old volcano sitting right there.

    Most of these larger quakes are between 10km and 16km deep.

    http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=38.286N,+118.221W&aq=&sll=38.272689,-118.125&sspn=41.078163,107.138672&ie=UTF8&ll=38.292092,-118.22113&spn=0.323891,0.837021&t=h&z=11

    Green arrow is the surface representation of where the quake was 10km down.

  20. E.M.Smith says:

    More in Christchurch. One hopes it is only an aftershock:

    Magnitude 5.2 – SOUTH ISLAND OF NEW ZEALAND
    2011 April 16 05:49:22 UTC

    This event has been reviewed by a seismologist.Magnitude 5.2
    Date-Time Saturday, April 16, 2011 at 05:49:22 UTC
    Saturday, April 16, 2011 at 05:49:22 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 43.626°S, 172.837°E
    Depth 9.2 km (5.7 miles)
    Region SOUTH ISLAND OF NEW ZEALAND
    Distances 16 km (9 miles) ESE of Christchurch, New Zealand
    232 km (144 miles) SSE of Westport, New Zealand
    304 km (188 miles) SSW of WELLINGTON, New Zealand
    310 km (192 miles) NE of Dunedin, New Zealand
    Location Uncertainty horizontal +/- 11.8 km (7.3 miles); depth +/- 4.4 km (2.7 miles)
    Parameters NST= 42, Nph= 46, Dmin=17.8 km, Rmss=0.98 sec, Gp=184°,
    M-type=body wave magnitude (Mb), Version=4
    Source USGS NEIC (WDCS-D)
    Event ID usc0002su1

    And an odd set of three around that small plate between Japan and the Philippines. As though the energy is flowing down to them now. So a new volcano there how soon? ;-)

    Magnitude 5.0 – GUAM REGION
    2011 April 16 17:30:51 UTC

    This event has been reviewed by a seismologist.Magnitude 5.0
    Date-Time Saturday, April 16, 2011 at 17:30:51 UTC
    Sunday, April 17, 2011 at 03:30:51 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 12.039°N, 143.039°E
    Depth 24.2 km (15.0 miles)
    Region GUAM REGION
    Distances 244 km (152 miles) SW (230°) from HAGATNA, Guam
    455 km (283 miles) SW (220°) from SAIPAN, Northern Mariana Islands
    1641 km (1020 miles) N (9°) from Jayapura, Irian Jaya, Indonesia
    Location Uncertainty horizontal +/- 18.2 km (11.3 miles); depth +/- 7.2 km (4.5 miles)
    Parameters NST=119, Nph=123, Dmin=262.7 km, Rmss=0.95 sec, Gp= 61°,
    M-type=body wave magnitude (Mb), Version=7
    Source USGS NEIC (WDCS-D)
    Event ID usc0002t0t

    Magnitude 5.2 – BONIN ISLANDS, JAPAN REGION
    2011 April 16 09:20:26 UTC

    This event has been reviewed by a seismologist.Magnitude 5.2
    Date-Time Saturday, April 16, 2011 at 09:20:26 UTC
    Saturday, April 16, 2011 at 07:20:26 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 27.961°N, 139.445°E
    Depth 509.7 km (316.7 miles)
    Region BONIN ISLANDS, JAPAN REGION
    Distances 290 km (180 miles) WNW of Chichi-shima, Bonin Islands, Japan
    398 km (247 miles) NNW of Iwo Jima, Volcano Islands, Japan
    572 km (355 miles) S of Hachijo-jima, Izu Islands, Japan
    857 km (532 miles) S of TOKYO, Japan
    Location Uncertainty horizontal +/- 15.4 km (9.6 miles); depth +/- 12.3 km (7.6 miles)
    Parameters NST=105, Nph=108, Dmin=287.2 km, Rmss=0.71 sec, Gp= 68°,
    M-type=body wave magnitude (Mb), Version=9
    Source USGS NEIC (WDCS-D)
    Event ID usc0002swx

    Magnitude 5.7 – NORTHEAST OF TAIWAN
    2011 April 16 01:11:10 UTC

    This event has been reviewed by a seismologist.Magnitude 5.7
    Date-Time Saturday, April 16, 2011 at 01:11:10 UTC
    Saturday, April 16, 2011 at 10:11:10 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 25.393°N, 124.019°E
    Depth 131.9 km (82.0 miles)
    Region NORTHEAST OF TAIWAN
    Distances 111 km (68 miles) N of Ishigaki-jima, Ryukyu Islands, Japan
    235 km (146 miles) ENE of Su’ao, Taiwan
    254 km (157 miles) E of TAIPEI, Taiwan
    1235 km (767 miles) NNE of MANILA, Philippines
    Location Uncertainty horizontal +/- 13.7 km (8.5 miles); depth +/- 7.3 km (4.5 miles)
    Parameters NST=345, Nph=371, Dmin=144.7 km, Rmss=1.2 sec, Gp= 25°,
    M-type=regional moment magnitude (Mw), Version=8
    Source USGS NEIC (WDCS-D)
    Event ID usc0002sqf

    So I’d make that a “couple of years” and we get a big Indonisia quake, then the Indonisia volcanoes 6 years later or… just about the middle of the “solar minimum cooling” as in past cycles.

    Gee… who knew? ;-0

  21. E.M.Smith says:

    @George:

    I really appreciate your doing the “digging” to get those surface maps. I’m just “out of time” and it helps in the “barn raising” aspect I was hoping would build here. Warms the heart it does 8-)

    Per the Quake / Volcano matching:

    I fear and thrill that we are “living in interesting times”.

    I’ve waited about 50 years for one of my “local volcanoes” to do something and it would be nice to have one wake up during my eyeblink on this land. (Even if only a little one, you know, maybe 20 square miles ;-)

  22. P.G. Sharrow says:

    I knew some people that lived 80 miles down wind of MT.St. Helens. They got very tired of it and its’ dust. pg

  23. Keith Hill says:

    Having friends in renowned volcanic site Taupo, New Zealand, I’m always interested in shaking events that could affect that area.

    Under quakes in the last 8-30 days on the world map in your links, three red squares off the coast of North Island NZ stood out, all indicating deep quakes. Is something stirring volcano-wise deep-down? I wonder.

    EM, I recommend http://www.geonet.org.nz/ as a very informative site.

    It has real-time seismic readings and a wealth of detailed information on NZ volcanoes plus many other features. A cut and paste sample below. Note the CO2 readings. Even the AGW lobby can’t blame these on Man!

    “Thursday March 24 – Gas flight over Ruapehu and Ngauruhoe”
    ( Aerial view of the Crater Lake during a gas sampling flight on March 24 is shown).
    “Conditions were excellent. The volcanoes were clear of cloud, and the wind was steady at around 14 knots.

    CO2 emissions at Ruapehu were high at 2,074 T/Day when compared with the moderate CO2 emissions (> 400 T/Day) detected in February, but cloud on that occasion prevented a full measurement. SO2 emissions were very low, and were barely detectable by COSPEC. H2S emissions were moderate.

    The crater lake was blue-green in colour, and a weak upwelling was visible as a darker colour in the middle of the lake.”

    Cheers from Tasmania, which even had a little 2.4 tremor of it’s own this week!

  24. R. de Haan says:

    “cumulative seismic moment”

    We should have that data for the entire planet.

  25. George says:

    Ok, this latest 4.6 is beginning to concern me. This is getting close to my “magic” 5s but there have now been 10 quakes of M4 or larger.

    BUT … this is Nevada. We seem to have a history of these quake swarms showing up and then just going away for no apparent reason.

  26. Scarlet Pumpernickel says:

    in the 20th century, it was pretty quiet volcano wise. Even this Iceland one recently was very very small. It’s time for something big to happen :P

    Maybe Taal?

  27. E.M.Smith says:

    @George:

    I’ve put an update page up above at the “Closeups”. Notice that yesterday the quake count in the 10 degree wedge was 163, and today it is 233.

    They may be small ones, be we are taking a lot of quakes / day there.

    California is up to 606. I remember that not too long ago I was surprised at “over 100” and when it was about 250 it seemed really high…

    Don’t know what the actual range is on that number, but I gotta say that I’ve never seen a 600+ before (though I’ve only watched it closely for a few years…)

    To me it says “something is up”. Just don’t know what….

    @R. de Haan:

    Someone probably does, but I’ve not the time right now to go looking for it. Might have to create it from the historical quake record at the USGS.

    @Keith Hill:

    My Mom was from England. Her best friend moved to North Island. I visited them in the 1980’s. Good folks. Doubt that their kids ever left, so I wish them well. I one time I wanted to emigrate to N.Z. (still have the ’emigration book’ they handed out) but it didn’t come together. Oh well, too old now. (At least then, you had to be under 35 or some such and have skills on a particular list. Then it was computer stuff and I qualified.)

    @P.G. Sharrow:

    “Volcoanoes are for visiting” ;-)

  28. Ian W says:

    Time

    @pascvaks

    I was told an old saying that sums that up…

    “Take a block of polished marble 1000 miles by 1000 miles by 1000 miles and every 1000 years flick it once with a silk cloth. When the marble has worn away is but one tick of the clock of eternity.”

  29. pascvaks says:

    Ref – R. de Haan
    “cumulative seismic moment”
    We should have that data for the entire planet.
    ______________

    Isn’t that already in the formula for AGW? Must be. Bet it’s a BIG factor in the rise of Manmade CO2 levels in the past 12K years. If people weren’t walking around the planet so much lighting campfires the planetary core would have cooled off and there wouldn’t be anymore volcanoes, sooooo.. any new cracks and any gases escaping from Mother Earth are Manmade. I’m sure the IPCC has factored it into their witch’s brew. Right?

  30. E.M.Smith says:

    So close to exactly on top of the first location that I almost didn’t notice it. But the “one to the side” had turned yellow, and this one was ‘still blue’ when that spot had happened first… which means it was actually a newer one on top of it. Just about 4 hours ago:

    Magnitude 4.1 – NEVADA
    2011 April 17 00:55:46 UTC

    This event has been reviewed by a seismologist.Magnitude 4.1
    Date-Time Sunday, April 17, 2011 at 00:55:46 UTC
    Saturday, April 16, 2011 at 05:55:46 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 38.369°N, 118.728°W
    Depth 13.2 km (8.2 miles)
    Region NEVADA
    Distances 19 km (12 miles) WNW (291°) from Qualeys Camp, NV
    20 km (12 miles) SSW (208°) from Hawthorne, NV
    30 km (19 miles) NE (55°) from Bodie, CA
    240 km (149 miles) E (94°) from Sacramento, CA
    Location Uncertainty horizontal +/- 2.8 km (1.7 miles); depth +/- 10.2 km (6.3 miles)
    Parameters NST= 12, Nph= 14, Dmin=33.8 km, Rmss=0.14 sec, Gp=133°,
    M-type=local magnitude (ML), Version=7
    Source Seismological Laboratory, University of Nevada, Reno
    Event ID nn00333406

    And it already has a dozen-ish little 1.0 sized on top of it along with a couple of red ones (i.e. in the last hour).

  31. E.M.Smith says:

    Well, a 3.8 very near me, but up the peninsula a ways.

    Not much at my end other than a bit of the “wobbly head” feeling. Not even a ‘window rattle”.

    IMHO, it’s a foreshock. No, nothing scientific. Just that foreshocks have a ‘sharper faster’ aspect to them in my experience. Like a giant “click”, not a giant “crush cruch slide creak”…

    Heck, I was out in the yard with the bunnies and even they didn’t do anything.

    Magnitude 3.8 – SAN FRANCISCO BAY AREA, CALIFORNIA
    2011 April 18 21:57:19 UTC

    This event has been reviewed by a seismologist.Magnitude 3.8
    Date-Time Monday, April 18, 2011 at 21:57:19 UTC
    Monday, April 18, 2011 at 02:57:19 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 37.597°N, 122.455°W
    Depth 13.6 km (8.5 miles)
    Region SAN FRANCISCO BAY AREA, CALIFORNIA
    Distances 4 km (2 miles) SE (136°) from Pacifica, CA
    4 km (2 miles) SW (220°) from San Bruno, CA
    5 km (3 miles) W (266°) from Millbrae, CA
    10 km (6 miles) S (175°) from Daly City, CA
    13 km (8 miles) WNW (291°) from San Mateo, CA
    20 km (12 miles) S (189°) from San Francisco City Hall, CA
    Location Uncertainty horizontal +/- 0.2 km (0.1 miles); depth +/- 0.4 km (0.2 miles)
    Parameters Nph= 79, Dmin=4 km, Rmss=0.1 sec, Gp= 72°,
    M-type=local magnitude (ML), Version=3
    Source California Integrated Seismic Net:
    USGS Caltech CGS UCB UCSD UNR
    Event ID nc71560691

  32. E.M.Smith says:

    I note that the “quake count” on the California map is now at 646. 3 days ago it was 572. A few months back it was in the 100-200 range. Things are difinitely on an upswing.

    This one is interesting too:

    Magnitude 6.6 – SOUTH OF THE KERMADEC ISLANDS
    2011 April 18 13:03:03 UTC

    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 6.6
    Date-Time Monday, April 18, 2011 at 13:03:03 UTC
    Tuesday, April 19, 2011 at 01:03:03 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 34.349°S, 179.854°E
    Depth 90.7 km (56.4 miles) set by location program
    Region SOUTH OF THE KERMADEC ISLANDS
    Distances 323 km (200 miles) SSW of L’Esperance Rock, Kermadec Islands
    527 km (327 miles) NNE of Gisborne, New Zealand
    552 km (342 miles) ENE of Auckland, New Zealand
    910 km (565 miles) NNE of WELLINGTON, New Zealand
    Location Uncertainty horizontal +/- 4.9 km (3.0 miles); depth fixed by location program
    Parameters NST=422, Nph=421, Dmin=383.5 km, Rmss=1.07 sec, Gp= 29°,
    M-type=centroid moment magnitude (Mw), Version=G
    Source USGS NEIC (WDCS-D)
    Event ID usc0002ty7

  33. Interesting Connections says:

    I was in a building in San Mateo and felt two shocks.

    The first, fast wave came through and it felt like someone had crashed into the building.

    Then the S wave came through and lasted a bit longer. They were close together. Only about two seconds or something. Building was fine.

  34. E.M.Smith says:

    @Interesting Connections:

    Sounds like P then S wave. From the 2 seconds you can calculate your distance to the epicenter (though it would be easier to look on the USGS map ;-)

    San Mateo was much closer than me. And I’m on a geology type that doesn’t feel the San Andreas much (“This behaviour is by design” ;-)

    I’m going to be watching very closely for a few days in here…

    Oh, and Chile just got another one 5.2 sized:

    Magnitude 5.2 – OFFSHORE VALPARAISO, CHILE
    2011 April 19 00:57:29 UTC

    This event has been reviewed by a seismologist.Magnitude 5.2
    Date-Time Tuesday, April 19, 2011 at 00:57:29 UTC
    Monday, April 18, 2011 at 08:57:29 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 33.356°S, 72.051°W
    Depth 20.7 km (12.9 miles)
    Region OFFSHORE VALPARAISO, CHILE
    Distances 47 km (29 miles) WNW of San Antonio, Valparaiso, Chile
    54 km (33 miles) SW of Valparaiso, Valparaiso, Chile
    129 km (80 miles) W of SANTIAGO, Region Metropolitana, Chile
    147 km (91 miles) WSW of Los Andes, Valparaiso, Chile
    Location Uncertainty horizontal +/- 13.9 km (8.6 miles); depth +/- 7.2 km (4.5 miles)
    Parameters NST= 99, Nph=108, Dmin=105.8 km, Rmss=1.06 sec, Gp=130°,
    M-type=body wave magnitude (Mb), Version=5
    Source USGS NEIC (WDCS-D)
    Event ID usc0002uhi

  35. E.M.Smith says:

    Mammoth gets a 3.0 right in the cauldera as near as I can tell.

    Magnitude 3.0 – CENTRAL CALIFORNIA
    2011 April 18 22:47:02 UTC

    This is a computer-generated message — this event has not yet been reviewed by a seismologist.Magnitude 3.0
    Date-Time Monday, April 18, 2011 at 22:47:02 UTC
    Monday, April 18, 2011 at 03:47:02 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 37.524°N, 118.826°W
    Depth 7.8 km (4.8 miles)
    Region CENTRAL CALIFORNIA
    Distances 14 km (8 miles) WSW (252°) from Toms Place, CA
    18 km (12 miles) SE (133°) from Mammoth Lakes, CA
    24 km (15 miles) WNW (301°) from Round Valley, CA
    258 km (160 miles) ESE (116°) from Sacramento, CA
    Location Uncertainty horizontal +/- 0.3 km (0.2 miles); depth +/- 0.7 km (0.4 miles)
    Parameters Nph= 33, Dmin=7 km, Rmss=0.05 sec, Gp=101°,
    M-type=duration magnitude (Md), Version=1
    Source California Integrated Seismic Net:
    USGS Caltech CGS UCB UCSD UNR
    Event ID nc71560731

  36. George says:

    The Hawthorne sequence is still interesting to me. It continues albeit with smaller quakes. A couple near the shore of Mono Lake about 30 miles away. The area around Mono Lake has seen activity in the past few hundred to several hundred years.

    Some geologists in Nevada are scurrying to get new sensors placed near the current sequence.

  37. E.M.Smith says:

    All of California / Nevada is interesting at the moment.

    I’ve got a couple of 2.x near me ( 2.3 and 2.7) then there’s that one near SF with aftershocks and the count total is up to 652 now (six higher than my comment here:
    https://chiefio.wordpress.com/2011/04/15/quakes-an-odd-thing-on-the-california-nevada-border/#comment-16621 )

    As the count is over a fixed window of time in size; a rising count means we are adding quakes faster than we are losing them. We are accelerating the count. Eventually we’ll reach some max rate, then 2 weeks later the count will start to drop as that max rate exits and the later rate was lower (maybe a bit sooner than 2 weeks depending on the exact rise / fall count profiles). But for now, the acceleration continues.

    Then add in all that activity in the volcanic spreading zone areas (Including Mammoth) and it’s just a worry.

    I’ve also got my “wobbly feeling” that tends to indicate quakes going on and it’s just a worry.

    Yeah “scurrying geologists”… all over the place. Just the thing to bring peacful sleep ;-)

    I just can’t quite shake the feeling that we’re going to get a volcano somewhere up that way. Maybe only a dinky one, but it just feels like it’s entering that kind of activity.

  38. E.M.Smith says:

    California has now crossed 701 quakes on the quake count. That’s in 2 weeks. We continue to accellerate in number of quakes in the 2 week sliding window.

    I’m really not liking that…

  39. Pingback: Gaia shaking… | pindanpost

  40. R. de Haan says:

    We had another 5.6 in the Gulf, 15 km deep.

  41. E.M.Smith says:

    @R. de Haan:

    Yup, this one:

    Magnitude 5.6 – GULF OF CALIFORNIA
    2011 April 26 21:10:26 UTC

    This event has been reviewed by a seismologist.Magnitude 5.6
    Date-Time Tuesday, April 26, 2011 at 21:10:26 UTC
    Tuesday, April 26, 2011 at 02:10:26 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 27.439°N, 111.598°W
    Depth 15.1 km (9.4 miles)
    Region GULF OF CALIFORNIA
    Distances 73 km (45 miles) E of Santa Rosalia, Baja Calif. Sur, Mexico
    88 km (54 miles) SW of Guaymas, Sonora, Mexico
    161 km (100 miles) N of Loreto, Baja California Sur, Mexico
    667 km (414 miles) S of PHOENIX, Arizona
    Location Uncertainty horizontal +/- 20 km (12.4 miles); depth +/- 8.2 km (5.1 miles)
    Parameters NST=136, Nph=137, Dmin=64.6 km, Rmss=1.19 sec, Gp=101°,
    M-type=regional moment magnitude (Mw), Version=8
    Source USGS NEIC (WDCS-D)
    Event ID usc0002zkq

    Further down there is this one:

    2011 April 26 11:07:30 UTC

    This event has been reviewed by a seismologist.Magnitude 5.3
    Date-Time Tuesday, April 26, 2011 at 11:07:30 UTC
    Tuesday, April 26, 2011 at 06:07:30 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 17.100°N, 99.380°W
    Depth 19.5 km (12.1 miles)
    Region GUERRERO, MEXICO
    Distances 48 km (29 miles) ENE of Acapulco, Guerrero, Mexico
    61 km (37 miles) S of Chilpancingo, Guerrero, Mexico
    149 km (92 miles) S of Iguala, Guerrero, Mexico
    269 km (167 miles) S of MEXICO CITY, D.F., Mexico
    Location Uncertainty horizontal +/- 12.9 km (8.0 miles); depth +/- 4.9 km (3.0 miles)
    Parameters NST=301, Nph=338, Dmin=100.2 km, Rmss=0.75 sec, Gp=101°,
    M-type=body wave magnitude (Mb), Version=D
    Source USGS NEIC (WDCS-D)
    Event ID usc0002z6v

    There is also one in Chile

    Magnitude 5.3 – OFFSHORE VALPARAISO, CHILE
    2011 April 27 04:57:33 UTC

    This event has been reviewed by a seismologist.Magnitude 5.3
    Date-Time Wednesday, April 27, 2011 at 04:57:33 UTC
    Wednesday, April 27, 2011 at 12:57:33 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 33.853°S, 72.167°W
    Depth 7.1 km (4.4 miles) (poorly constrained)
    Region OFFSHORE VALPARAISO, CHILE
    Distances 97 km (60 miles) SSW (208°) from Valparaiso, Chile
    144 km (90 miles) WSW (254°) from SANTIAGO, Chile
    185 km (115 miles) NNW (346°) from Talca, Chile
    Location Uncertainty horizontal +/- 22.2 km (13.8 miles); depth +/- 7.1 km (4.4 miles)
    Parameters NST=178, Nph=179, Dmin=144.7 km, Rmss=0.74 sec, Gp=130°,
    M-type=body wave magnitude (Mb), Version=6
    Source USGS NEIC (WDCS-D)
    Event ID usc0002ztt

    But what I find more interesting are the two in the 3.x range up in N. California. One near “Chester” that’s not too far from Lassen and the other near The Geysers. Both in volcanic areas.

    Magnitude 3.9 – NORTHERN CALIFORNIA
    2011 April 26 17:43:08 UTC

    This event has been reviewed by a seismologist.Magnitude 3.9
    Date-Time Tuesday, April 26, 2011 at 17:43:08 UTC
    Tuesday, April 26, 2011 at 10:43:08 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 38.813°N, 122.817°W
    Depth 3.5 km (2.2 miles)
    Region NORTHERN CALIFORNIA
    Distances 2 km (1 miles) NNW (330°) from The Geysers, CA
    9 km (5 miles) WSW (253°) from Cobb, CA
    12 km (7 miles) WNW (291°) from Anderson Springs, CA
    17 km (11 miles) E (85°) from Cloverdale, CA
    42 km (26 miles) NNW (346°) from Santa Rosa, CA
    120 km (75 miles) WNW (284°) from Sacramento, CA
    Location Uncertainty horizontal +/- 0.1 km (0.1 miles); depth +/- 0.2 km (0.1 miles)
    Parameters Nph= 86, Dmin=1 km, Rmss=0.06 sec, Gp= 25°,
    M-type=regional moment magnitude (Mw), Version=7
    Source California Integrated Seismic Net:
    USGS Caltech CGS UCB UCSD UNR
    Event ID nc71566046

    Magnitude 3.3 – NORTHERN CALIFORNIA
    2011 April 26 08:02:49 UTC

    This event has been reviewed by a seismologist.Magnitude 3.3
    Date-Time Tuesday, April 26, 2011 at 08:02:49 UTC
    Tuesday, April 26, 2011 at 01:02:49 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 40.230°N, 121.053°W
    Depth 2 km (1.2 miles) (poorly constrained)
    Region NORTHERN CALIFORNIA
    Distances 2 km (2 miles) ESE (123°) from East Shore, CA
    6 km (4 miles) SE (143°) from Hamilton Branch, CA
    7 km (4 miles) NNE (16°) from Canyondam, CA
    40 km (25 miles) WSW (239°) from Susanville, CA
    190 km (118 miles) N (11°) from Sacramento, CA
    Location Uncertainty horizontal +/- 0.3 km (0.2 miles); depth +/- 2.3 km (1.4 miles)
    Parameters Nph= 45, Dmin=25 km, Rmss=0.14 sec, Gp=130°,
    M-type=regional moment magnitude (Mw), Version=5
    Source California Integrated Seismic Net:
    USGS Caltech CGS UCB UCSD UNR
    Event ID nc71565781

    While things are generally quieting down, it still looks like the pattern of energy flowing up from Baja into the two sides of The Big Valley, and drifting north past the volcanic areas continues to hold.

    Just strange. To the extent it means anything, that would imply the recent Mexico quakes are going to result in more up here “in a bit”. We’ll see if it has any predictive power or if it’s just balderdash ;-)

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