Are the Volcanos Waking?

In this prior posting I’d wondered if the “action” in Nevada just north of Mammoth “Lakes” was, perhaps, a bit of volcanic “wakey wakey”… Then, in “Tips” up top, Scarlet Pumpernickel pointed to a similar pondering by others:

Some info on the volcano in USA that’s coming?

That link has a video, along with some text. The video is well worth watching. It states that there has been more than 9 quakes of 4.x scale. This means that several were right on top of each other and I didn’t notice the blue square staying blue… The film also says that Nevada state emergency folks are “preparing” and that the Feds are a bit antsy too:

Five Hundred plus earthquakes near Hawthorne, Nev. over the past week have scientists looking closer at the ground.

They are looking at seismic and volcanic activity in Nevada. What is the possibility of “the big one” hitting Nevada? Or a volcano popping-up in Nevada?

The images from the movie “Volcano” are extreme. But, could we see the explosions or lava flow like in this film happen in Nevada? Seismologist Graham Kent says a movie-like eruption is not likely. “The type of lava that comes out of Aurora crater is much more like the Hawaiian. It is not the explosive kind.”

Kent is talking about the Aurora Volcanic Field located just miles from the area where hundreds of quakes began rumbling a week ago. The center of those quakes, just eight miles from Hawthorne, Nev.

Kent says there has not been any significant volcanic activity there for 250,000 years. And there is not much risk of a catastrophic volcanic event.

But, there is risk of a big quake. The tremors are near Hawthorne, yet that does not mean Nevada state residence should ignore them. Kent says “this is a very significant sequence.”
The Division of Emergency Management in Carson City is in place for quick action should it be needed. “Both folks at state and federal level are concerned,” says Kent. All of this could be leading to a big quake in other parts of the state.

Story by: Brooke Boone

If Mammoth “Lakes” decides to blow, where does the ash fall?

Tephra Fall from Mammoth "Lakes" small to moderate eruption

Tephra Fall from Mammoth "Lakes" small to moderate eruption

OK, so I’ve been watching the “California and nearby” map for a few years now. It usually runs in the 100-200 quake count. (It is a 2 week sliding window, so as new quakes are added, others are ‘aging out’). In the last couple of months, the count has steadily risen. First through 300, then 400. About a week back I commented that it was over 500, and just a day or so ago I noticed it pass through 600. Right now, it’s at 701 total quakes.


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.

Quakes California 17Mar2011 20-14 32.42.-125.-115

Quakes California 17Mar2011 20-14 32.42.-125.-115

In the upper left corner, notice that “count” at 374. I thought that was “a bit high” at the time. Now? Now it looks small in comparison to this:

Quakes Calif 20April2011 32.42.-125.-115

Quakes Calif 20April2011 32.42.-125.-115

So when will this stop rising? Don’t know. But here is a “live map” so we can see when it happens.

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’.

On 16 April 2011 I’d noted in the prior posting:

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

The live close up. Count pushing 300 as I post.:

Quakes Hawthorne Nevada live

Quakes Hawthorne Nevada live

Original Image

Here is an alternative view of things with the fault lines highlighted. It includes all of Nevada, not just a degrees arc, so the quake count is a bit different in this view:

California Quakes with fault lines

California Quakes with fault lines

Original Image

Special Note on Cascadia

In taking a peak at the Cascadia area, I noticed that it, too, had a bunch of quakes under the area where the volcanoes live:

Quakes Cascadia 20April2011 42.52.-130.-120

Quakes Cascadia 20April2011 42.52.-130.-120

Notice that those small quakes are inland from the plate boundaries and the major spreading and subduction faults. They are where the volcanos sprout after the subducting plate melts and makes rising magma.

Here is a live view:

Quakes Seattle to Portland and Cascadia

Quakes Seattle to Portland and Cascadia

Original Image with clickable quake info

And remember, I have a dedicated CSZ page with closeups


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

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


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:

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

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

Some Volcano Stuff

This page: has a nice collection of links to volcano monitor pages. Just click the pictures for the different volcano observatories.

The Smithsonian page:

Subscribe to feed

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...
This entry was posted in Earth Sciences and tagged , , . Bookmark the permalink.

43 Responses to Are the Volcanos Waking?

  1. Scarlet Pumpernickel says: Here’s the Kamchatka one that blasted off the other day

  2. R. de Haan says:

    I thought the blast came from Bezymianny?

  3. E.M.Smith says:

    @R. de Haan:

    A search of the S.I. site, of the wiki on Bezymianny, and of the John Seach web site does not show large activity at that volcano.

    Though the S.I. site does show some minor activity:

    KVERT reported that during 1-11 April seismicity from Bezymianny increased. Gas-and-steam activity was observed during 1-2 April; clouds obscured views on the other days. A thermal anomaly over the volcano observed in satellite imagery was weak during 1-3 and 6 April, then increased in size and became more intense. The Aviation Color Code was raised to Orange.

    Geologic Summary. Prior to its noted 1955-56 eruption, Bezymianny volcano had been considered extinct. Three periods of intensified activity have occurred during the past 3,000 years. The latest period, which was preceded by a 1,000-year quiescence, began with the dramatic 1955-56 eruption. That eruption, similar to the 1980 event at Mount St. Helens, produced a large horseshoe-shaped crater that was formed by collapse of the summit and an associated lateral blast. Subsequent episodic but ongoing lava-dome growth, accompanied by intermittent explosive activity and pyroclastic flows, has largely filled the 1956 crater.

  4. Scarlet Pumpernickel says:

    I guess it was RED so something must have happened there too?

    55°58’N, 160°36’E; Elevation 9,455 ft (2,882 m)

    Pretty dark on the webcam :P

    Anyway, back to the birth of volcanoes, this was the last one wasn’t it, a cinder cone in Mexico

    And Lassen Peak was the last one in the area it’s been pretty sleepy in USA since Mnt St Helen’s did it’s thing 30 years ago or so…

  5. Scarlet Pumpernickel says:

    Previous swarm in 2004 looks pretty similar, is there a large plume of lava moving under the area?

    Something to look forward to lol?

  6. Scarlet Pumpernickel says:

    Steamboat is hidden because of a new Geothermal plant…

    Steamboat Springs, Nevada (USA)
    Fissure at Steamboat Springs, National Archives photoSteamboat Springs geyser field is located several miles south of Reno, Nevada along the highway to Carson City. According to GOSA Transactions (The annual Journal of the Geyser Observation and Study Association) Vol 1 1989,

    “During 1984 through 1987 eruptive activity at Steamboat Springs, Nevada, was observed in as many as 21 springs, despite many reports of the areas demise. This number of geysers means that Steamboat was the fourth or fifth largest geyser area in the world. Height of observed activity ranged from heavy overflow to approximately 15 meters. In 1987 a nearby geothermal powerplant, in conjunction with a regional drought, caused the end of all geyser activity to date”

    Water levels noted in July 2003 were at least 10 meters below the surface. One of the largest and most accessible geyser fields in the world is gone forever.

  7. pyromancer76 says:

    Sorry, OT. Can’t find a “tips” section; this probably belongs in something like, “there is no shortage” — water and a (maybe) new technology. However, at the top of this post is “techno bits and mind pleasers” so —

  8. E.M.Smith says:

    @Scarlet Pumpernickel:

    I’ve added the ash fall map from the link you gave to the posting. I’ve seen another one of those that has more “east drift” from the general onshore winds. On the map abouve, I’m right at the edge of a “modest” event. On the map with wind drift, on right on the edge of a “major event”. I’m hoping it’s windy the day the thing blows ;-)


    Scroll all the way to the top. Between the “GIStemp and Racing Stocks” tabs and the “Search box” on the far right you will find the tiny word “Tips” almost hidden. ;-0

    No worries, though. I may move the comment later, or maybe not. Depends on my “sloth” level today ;-)

  9. pascvaks says:

    Suppose, maybe, Milankovitch Variations might be connected to volcanic and earthquake intensity variation, along with shifts in weather patterns? Things sure are gettin’ complicated ;-)

  10. E.M.Smith says:


    Neat Graph! I’d wanted such a graph… is there a “who made it from what data” somewhere?

  11. E.M.Smith says:

    Where I am it feels like f”earthquake weather”. Everything has gone WAAAY too still…

    A SILENCE. A stillness of the air. Deep in the Earth, the winds are bottled up in a cave. Everything is quiet, in fact everything is far too quiet. People get uncomfortable but they don’t know why. “Earthquake weather,” they say. And cross themselves, touch wood. Deep down in the Earth, way down where you can’t see it, where you don’t know where the dark things are, the pressures are building. The heat is building, the plates are shifting, grinding in opposite directions. America is moving toward Asia. Slow. It’s slow but it’s big. The rubber band has been stretched and stretched and all at once with no warning it snaps back and by God, it hurts. We’re on the Ring of Fire, you know. No warning. Houses fall, people killed, fires burning. The only solid foundation has proved unreliable, and you can never really trust anything again. The Earth herself has shrugged and all her little inhabitants are made aware once again of what they may have forgotten: Mother Nature bats last.

    February 17, 1994

    Herodotus (born c. 490 BC) recounts that a stillness both precedes and creates earthquakes because the winds are bottled up in a cave.

    While it isn’t a hot oppressive stillness, more of a cool opressive stillness, it still “has that feel” to it.

    Then again, with well over 700 quakes in the western region in the last 2 weeks, it’s kind of hard NOT to have a quake these days…

  12. George says:

    The area around Hawthorne has seen quakes before. I have found reports going back to the late 1800’s of apparent quake swarms in that area and they seem to happen at roughly 25 year intervals (+/- 10 years) but that interval probably means nothing.

    I would be interested in data such as

    CO2 content of springs in the area.
    Ground deformation data.

    This does not appear to be related to the Long Valley magma chamber but to a different one that has been responsible for small eruptions between Mono Lake and Hawthorne since the late Pleistocene.

    If you look at this map today:

    You will see what appears to be an arc forming between the main location of the quakes and the Northeast shore of Mono Lake.

    The area around Mono Lake has been active in the last 1000 years with an eruption in the center of the lake within the past 200 years. It might well be that the magma chamber that feeds these eruptions is actually in Nevada and that the magma finds a path to the West and erupts around Mono. We just don’t know because we had no instruments available and were not monitoring the area the last time there was an eruption around Mono Lake.

    The main cluster of activity still seems to be Southwest of Hawthorne. One thing to keep in mind is that as hot rock rises and the pressure reduces you can get decompression melting. In other words, the more it moves, the more it melts and is able to more easily move.

    If this is volcanic in nature, I would expect to see a change in the CO2 content of ground water and some change in ground deformation. But this area is probably not measured and being very arid, there may not be a lot of ground water to measure. I am not seeing any surface evidence of any creeks in the area. There does appear to be one creek Northwest of Aurora Crater but might be too far from the activity to be of any use.

  13. pascvaks says:

    Assuming you’re speaking of the Johnston graph. This link may help. Looks like he did it himself from annual data at USGS.

    Looks like he has a variety of interests;-)

  14. pascvaks says:

    ooooops.. forgot to add this graphic. one with a little longer timespan:

  15. vukcevic says:

    Updates for the ‘earthquake-geomagnetic’ back on line (after short brake away).

  16. Scarlet Pumpernickel says:

    I think actually there are 4 volcanoes active in Kamchatka at the moment. I plan to go there later in the year :P

  17. Scarlet Pumpernickel says:

    What I hate is if you post these questions to the USGS they’ll just say oh it’s just a swarm, it doesn’t mean anything. That’s why we still don’t understand these events properly, because nobody is trying to work out what they are. Remember Iceland, there was a massive swarm under the volcano, and I was thinking it’s going to erupt for sure, but the geologists kept playing it down saying no it’s not going to erupt it’s just a swarm. It might be true whats said above, the mono lake magma chamber maybe is so large or long it extends under Nevada? Maybe in 1-2 years it might erupt, or maybe sooner? The 1943 Mexico volcano had earthquakes before it erupts. Just because it doesn’t happen often doesn’t mean that you must totally disregard that it’s a possibility. They are all very well to keep saying that warming is caused by CO2 when there is no real evidence, but if there is an massive earthquake swarm ohhhhh noooooo it can’t be a new volcano. these things are active system, and because we’ve never had sensors there before, maybe we need to learn something?

  18. Scarlet Pumpernickel says:

    What USGS is saying on their facebook page

    U.S. Geological Survey (USGS)
    Previous response to similar question by Mike B.:
    Earthquakes in Nevada can be confidently related to the east-west broadening (extension) of that part of the continent, related to the now-ended subduction of the Farallon tectonic plate unde…r the North American continent. The state is riddled with faults, and many earthquakes (and all that are large enough to break through to the ground surface) can be directly related to the valley-bounding faults that are the manifestation of that extension.See More
    Yesterday at 4:33am · LikeUnlike
    Pyrate Steele So, if it’s movement within the Farallon tectonic plate, then why are volcanic sensors being placed today around the Aurora-Bodie/Hawthorne area to monitor any magma movement? [Source News4 – Las Vegas] While the plate may move and cause magma displacement, it could also be magma moving that is causing the plate to move, no?
    22 hours ago · LikeUnlike
    Danny Jackson Good question, Ms. Steele
    19 hours ago · LikeUnlike
    Pyrate Steele Aww shucks Mr. Jackson… ’tweren’t nuffin.
    18 hours ago · LikeUnlike
    VOLCANO Volcano coming?
    18 hours ago · LikeUnlike
    Pyrate Steele ‎*Makes the sign of a cross with my fingers* Back volcano I say! BACK! It’s already hot enough here in the desert!
    18 hours ago · LikeUnlike
    Danny Jackson ‎@Ms. Steele, LMAO while rolling on the floor! But, they do seem a little close to Mammoth lakes and being that Mammoth Lakes was under a Volcano watch a couple years ago, sure makes me wonder????
    17 hours ago · LikeUnlike
    U.S. Geological Survey (USGS) The Mammoth Lakes swarms have been associated with magma movement at considerable depth. Swarms can be caused by fault as well as magmatic movements. They typically (but not always) occur over a short time interval before tapering off. Try a USGS search for “earthquake swarms” at: -Greg D.

  19. Scarlet Pumpernickel says:

  20. Murray Duffin says:

    Chiefio, just came across this site –
    If you haven’t already seen it you will find it of interest. Murray

  21. E.M.Smith says:

    @Murray Duffin:

    We need something like that for “Climate Science” as well…

    Looks like a lot to read, and I’m “tending sick” right now, so I’ll have to get back to it later.

    (Nothing much, just someone with a minor bug…)

    @Scarlet Pumpernickel:

    See the California map up top. Hanging over 700 and with red spots in Baja, Hawthorn Nv., and up near The Geysers as I type. It’s not just Baja having a swarm. IMHO, it’s the whole da…rnd state.

  22. E.M.Smith says:

    Picked up a 6.1 less than 40 miles from Tokyo.

    2011 April 21 13:37:03 UTC

    Versión en Español
    Scientific & Technical
    Additional Info
    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 6.1
    Date-Time Thursday, April 21, 2011 at 13:37:03 UTC
    Thursday, April 21, 2011 at 10:37:03 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 35.617°N, 140.452°E
    Depth 42.9 km (26.7 miles)
    Distances 64 km (39 miles) E of TOKYO, Japan
    76 km (47 miles) ENE of Yokohama, Honshu, Japan
    82 km (50 miles) S of Mito, Honshu, Japan
    115 km (71 miles) SSE of Utsunomiya, Honshu, Japan
    Location Uncertainty horizontal +/- 14.8 km (9.2 miles); depth +/- 2.9 km (1.8 miles)
    Parameters NST=378, Nph=378, Dmin=227.1 km, Rmss=1.28 sec, Gp= 50°,
    M-type=regional moment magnitude (Mw), Version=8
    Source USGS NEIC (WDCS-D)
    Event ID usc0002w98

  23. E.M.Smith says:

    Well, looks to me like things are “backing off”… I’ll have to check what phase of the moon we’re in.

    We’re below 700 in California / Nevada now ( 670 ) as the early flush of swarm ages out to the 2 week point and starts to leave the window, while no new mass is entering to replace them.

    Looking at the global maps, not a lot of “new blue” or red either. This one in Chile:

    Magnitude 5.2 – OFFSHORE BIO-BIO, CHILE
    2011 April 22 05:12:50 UTC

    This event has been reviewed by a seismologist.Magnitude 5.2
    Date-Time Friday, April 22, 2011 at 05:12:50 UTC
    Friday, April 22, 2011 at 01:12:50 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 37.864°S, 73.687°W
    Depth 18.8 km (11.7 miles)
    Distances 128 km (79 miles) SSW (206°) from Concepcion, Chile
    133 km (82 miles) NW (318°) from Temuco, Chile
    219 km (136 miles) N (349°) from Valdivia, Chile
    557 km (346 miles) SSW (208°) from SANTIAGO, Chile
    Location Uncertainty horizontal +/- 21.5 km (13.4 miles); depth +/- 5 km (3.1 miles)
    Parameters NST=220, Nph=239, Dmin=418.6 km, Rmss=0.83 sec, Gp=122°,
    M-type=body wave magnitude (Mb), Version=7
    Source USGS NEIC (WDCS-D)
    Event ID usc0002wvp

    That is fairly ordinary for the region. They are one of the “9 Class Places” to a 5.x is 3 to 4 orders of magnetude away from what happens on a “big day”. Then there are a couple down near Tonga where we’ve seen this action for quite a while now. (Though it would be interesting if Tonga sprouted a volcano, at present it’s just “not much”):

    Magnitude 5.7 – TONGA REGION
    2011 April 22 17:14:48 UTC

    This event has been reviewed by a seismologist.Magnitude 5.7
    Date-Time Friday, April 22, 2011 at 17:14:48 UTC
    Saturday, April 23, 2011 at 05:14:48 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 22.703°S, 174.631°W
    Depth 1 km (~0.6 mile) (poorly constrained)
    Distances 183 km (113 miles) SSE of NUKU`ALOFA, Tonga
    453 km (281 miles) S of Neiafu, Tonga
    478 km (297 miles) ESE of Ndoi Island, Fiji
    1872 km (1163 miles) NE of Auckland, New Zealand
    Location Uncertainty horizontal +/- 17.3 km (10.7 miles); depth +/- 6.3 km (3.9 miles)
    Parameters NST=270, Nph=284, Dmin=797 km, Rmss=0.92 sec, Gp= 47°,
    M-type=regional moment magnitude (Mw), Version=5
    Source USGS NEIC (WDCS-D)
    Event ID usc0002x1w

    On this closeup map, you can see that it’s on an undersea fault that isn’t really near much of anything other than a city named Nuka Alofa.

    Which is having a nice day ( 75 F, or a perfect warm spring day, forecast 82 F high, partly cloudy, small breeze), per Wunderground, but the picture that they have looks a bit “swampy”…

    Though the Wiki has it as the capital city of Tonga and has pictures of “downtown” and some large captical buildings:ʻalofa

    The island is named Tongatapu

    The Wiki gives the size of the island as 100 sq. miles which leaves me wondering why they have so many cars in the only downtown of significance. We’re talking 10 miles on a side as a square or a bit over 5 miles diameter as a circle.

    Aside from the fact that a bycicle or pedal cab would get you darned near anywhere at about the same elapsed time as a car, that small size would make it ideal for a small railway and a perfect test case for an “Electric Car” economy.

    I mean, really, how much will you be worried about a 100 mile range if that lets you circle the whole island 3 times? (Assuming there is even a road all the way around the island…)

    The CIA Factbook:

    puts them at 184 km paved for the whole darned country. About 114 miles. Since some of that will be on other islands, and some of it ‘criscrossing’ streets in the downtowns and such; it looks to me like a great “living laboratory” for “green cars”.

    A modest suggestion:

    Before turning the whole world upside down replacing petrol driven cars and Diesel trucks globally, and finding out how long it takes to cross Texas “the long way” with an e-Car (hint: It’s 900 miles…) how about we pick a couple of tropical islands and convert them first? The globe is a big place. Lets have Nissan donate the cars, GE the added wind generators, etc. and have a “test case”.

    They would more than make up the costs with the adverizing benefits of “We Greened Tonga!” and the added toursim advertizing would pay off for Tonga…

    And all the rest of us would find out that there isn’t any 10,000 lb truck to haul freight using wind….

  24. Malaga View says:

    Though it would be interesting if Tonga sprouted a volcano

    Researchers are planning to study the Tonga Trench – a deep feature where the Pacific tectonic plate is being forced under the Indo-Australian plate.

    The island nation of Tonga is regularly hit by tremors – most recently a 6.4 magnitude quake offshore last month.

    The research expedition will last about one month.

    The focus of the study will be an unusual zone on the seabed where undersea volcanoes are being dragged into the fault.

    Scientists want a better understanding of how the submarine mountains affect the likelihood of earthquakes.

    The volcanoes lie on the 4,000km-long Louisville Ridge and either act as a brake on the Pacific plate – or intensify the quakes which follow.

    The area where they are pulled into the seabed suffers relatively fewer tremors than other stretches of the fault line.


  25. Pingback: Gaia shaking… | pindanpost

  26. E.M.Smith says:

    Don’t know what it is about Arkansas… but they keep having these “little guys” on a regular basis:

    Magnitude 2.9 – ARKANSAS
    2011 April 24 08:47:05 UTC

    This event has been reviewed by a seismologist.Magnitude 2.9
    Date-Time Sunday, April 24, 2011 at 08:47:05 UTC
    Sunday, April 24, 2011 at 03:47:05 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 35.213°N, 92.384°W
    Depth 4.9 km (3.0 miles)
    Region ARKANSAS
    Distances 14 km (8 miles) NNE of Conway, Arkansas
    52 km (32 miles) N of LITTLE ROCK, Arkansas
    58 km (36 miles) W of Searcy, Arkansas
    69 km (42 miles) E of Russellville, Arkansas
    Location Uncertainty horizontal +/- 7.8 km (4.8 miles); depth +/- 3 km (1.9 miles)
    Parameters NST= 34, Nph= 51, Dmin=3.3 km, Rmss=0.53 sec, Gp= 43°,
    M-type=”Nuttli” surface wave magnitude (mbLg), Version=7
    Source USGS NEIC (WDCS-D)
    Event ID usc0002xri

  27. E.M.Smith says:

    Well, we’re ramping down. At 568 in CalNeva map as I type. Interesting to note that the Cascadia is dropping apace. The whole place seems to trend together when it trends. Quakes are not isolated things…

    Only thing I see of interest is this odd little trail of 3 quakes that look like they are moving up the South Atlantic. Almost like the ocean floor is unzipping just a bit. Wonder what happens when it reaches Iceland? ;-)

  28. vukcevic says:

    Last 3 small up-surges in earthquakes were coinciding with approach of new or full moon. Yesterday’s one is different in that respect since it is around quarter-phase.

  29. E.M.Smith says:


    I love the approach you take with those graphs. Just wonderfully done.

    Now, if it’s this strong at quarter phase, how strong will it be as we hit the next full / new point? … just sayin ;-)


    Nice Catch on the Solomons… I was just visually blurring it in with all the other spots along that arch and missed it…

    We’ve also picked up a 6.2 in Indonesia.

    But what I found most interesting is a little 4.7 up the Atlantic Trench. That’s 4 of them, progressively headed north. At this rate, it’s 1 to 2 weeks and the process reaches Iceland… That Grimsvoten total energy graph is almost at the same point as the 2004 eruption now…

    2011 April 25 07:19:23 UTC

    This event has been reviewed by a seismologist.Magnitude 4.7
    Date-Time Monday, April 25, 2011 at 07:19:23 UTC
    Monday, April 25, 2011 at 06:19:23 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 0.460°S, 19.980°W
    Depth 10 km (6.2 miles)
    Distances 1036 km (643 miles) NW of Ascension Island
    1211 km (752 miles) SW of Bonthe, Sierra Leone
    1240 km (770 miles) SW of FREETOWN, Sierra Leone
    1856 km (1153 miles) ENE of Recife, Pernambuco, Brazil
    Location Uncertainty horizontal +/- 32.9 km (20.4 miles); depth +/- 2.9 km (1.8 miles)
    Parameters NST= 19, Nph= 19, Dmin=>999 km, Rmss=0.63 sec, Gp=104°,
    M-type=body wave magnitude (Mb), Version=3
    Source USGS NEIC (WDCS-D)
    Event ID usc0002y5r

    Magnitude 6.2 – SULAWESI, INDONESIA
    2011 April 24 23:07:51 UTC

    This event has been reviewed by a seismologist.Magnitude 6.2
    Date-Time Sunday, April 24, 2011 at 23:07:51 UTC
    Monday, April 25, 2011 at 07:07:51 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 4.593°S, 122.808°E
    Depth 9.4 km (5.8 miles)
    Distances 75 km (46 miles) SSE of Kendari, Sulawesi, Indonesia
    99 km (61 miles) NNE of Baubau, Sulawesi, Indonesia
    534 km (331 miles) NW of DILI, Timor-Leste
    1240 km (770 miles) NW of DARWIN, Northern Territory, Australia
    Location Uncertainty horizontal +/- 13.1 km (8.1 miles); depth +/- 4.8 km (3.0 miles)
    Parameters NST=134, Nph=139, Dmin=341.8 km, Rmss=1.58 sec, Gp= 50°,
    M-type=regional moment magnitude (Mw), Version=7
    Source USGS NEIC (WDCS-D)
    Event ID usc0002y0p

  30. E.M.Smith says:

    Picked up another 4.3 near Hawthorn:

    Magnitude 4.3 – NEVADA
    2011 April 27 19:19:20 UTC

    This event has been reviewed by a seismologist.Magnitude 4.3
    Date-Time Wednesday, April 27, 2011 at 19:19:20 UTC
    Wednesday, April 27, 2011 at 12:19:20 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 38.414°N, 118.718°W
    Depth 2.6 km (1.6 miles) (poorly constrained)
    Region NEVADA
    Distances 15 km (9 miles) SW (214°) from Hawthorne, NV
    20 km (13 miles) NW (305°) from Qualeys Camp, NV
    28 km (17 miles) SE (126°) from Wichman, NV
    240 km (149 miles) E (93°) from Sacramento, CA
    Location Uncertainty horizontal +/- 1 km (0.6 miles); depth +/- 2.9 km (1.8 miles)
    Parameters NST= 22, Nph= 25, Dmin=5.2 km, Rmss=0.13 sec, Gp= 72°,
    M-type=local magnitude (ML), Version=7
    Source Seismological Laboratory, University of Nevada, Reno
    Event ID nn00335238

    And Chile is continuing its chain of 5.x quakes:

    2011 April 27 04:57:33 UTC

    Versión en Español
    Scientific & Technical
    Earthquake Details
    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)
    Distances 58 km (36 miles) WSW of San Antonio, Valparaiso, Chile
    103 km (64 miles) SSW of Valparaiso, Valparaiso, Chile
    135 km (83 miles) WNW of Rancagua, Libertador O’Higgins, Chile
    146 km (90 miles) WSW of SANTIAGO, Region Metropolitana, 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

  31. E.M.Smith says:

    Panama gets a 6.0

    Magnitude 6.0 – SOUTH OF PANAMA
    2011 April 30 08:19:16 UTC

    This event has been reviewed by a seismologist.Magnitude 6.0
    Date-Time Saturday, April 30, 2011 at 08:19:16 UTC
    Saturday, April 30, 2011 at 03:19:16 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 6.878°N, 82.287°W
    Depth 9.9 km (6.2 miles)
    Distances 178 km (110 miles) S of David, Panama
    200 km (124 miles) SW of Santiago, Panama
    222 km (137 miles) SSE of Golfito, Costa Rica
    384 km (238 miles) SW of PANAMA CITY, Panama
    Location Uncertainty horizontal +/- 15.4 km (9.6 miles); depth +/- 2.7 km (1.7 miles)
    Parameters NST=399, Nph=406, Dmin=369.6 km, Rmss=1.33 sec, Gp= 58°,
    M-type=teleseismic moment magnitude (Mw), Version=A
    Source USGS NEIC (WDCS-D)
    Event ID usc00032mv

  32. R. de Haan says:

    Quakes continue
    03-MAY-2011 21:41:49 36.40 -117.88 4.5 2.0 CALIFORNIA-NEVADA BORDER REGION
    30-APR-2011 06:07:53 28.76 -113.18 4.3 10.0 BAJA CALIFORNIA, MEXICO
    29-APR-2011 22:31:59 28.84 -113.09 5.0 10.5 BAJA CALIFORNIA, MEXICO
    27-APR-2011 19:19:20 38.42 -118.71 4.0 5.1 CALIFORNIA-NEVADA BORDER REGION
    26-APR-2011 21:10:26 27.44 -111.60 4.7 15.0 GULF OF CALIFORNIA
    21-APR-2011 04:11:15 32.31 -115.60 4.0 10.0 CALIF.-BAJA CALIF. BORDER REGION

  33. R. de Haan says:

    As for the Global Quake numbers until the third of May:

    Magnitude 8 – 9.9
    2011 Earthquakes (1)
    annual average (1)
    100% of 20yr. YTD avg. until day #122

    Magnitude 7 – 7.9
    2011 Earthquakes (8)
    annual average (14)
    168% of 20yr. YTD avg. until day #122

    Magnitude 6 – 6.9
    2011 Earthquakes (114)
    annual average (134)
    255% of 20yr. YTD avg. until day #122

    Magnitude 5 – 5.9
    2011 Earthquakes (1,078)
    annual average (1,319)
    245% of 20yr. YTD avg. until day #122

  34. H.R says:

    @R. de Haan

    I like how that data is expressed. Not a bad way to lay it out. I also like that the quakes are rounded to the nearest whole earthquake.

    Magnitude 8 – 9.9
    2011 Earthquakes (1)
    annual average (1)
    100% of 20yr. YTD avg. until day #122

    For example, I did not know that on average, there was one 8-9.9 magnitude quake each year and the way it’s rounded, we either get 0, 1, or 2 of these per year. In any case, they are not as rare as I thought them to be. (Maybe I’m just not watching the right “all disasters all the time” channel.)

    Very nice. Thanks!

  35. E.M.Smith says:

    I find the action around the Mexico / Gulf of California area really interesting. Both because they have volcanoes down there and as it is evidence for that little plate being swallowed some more… Cocos Plate:

    Then again, this quake in California is about the same distance south of Mammoth “Lakes” as the others were north of it… and about the same size… and on the same spreading zone… It sure looks like the place is trying to open up just a tiny bit. Like the subduction in Japan has taken some pressure off the spreading here and is letting things spread out just a tiny…

    Magnitude 4.5 – CENTRAL CALIFORNIA
    2011 May 03 21:41:49 UTC
    Scientific & Technical
    Additional Info
    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 4.5
    Date-Time Tuesday, May 03, 2011 at 21:41:49 UTC
    Tuesday, May 03, 2011 at 02:41:49 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 36.395°N, 117.870°W
    Depth 2.2 km (1.4 miles)
    Distances 10 km (6 miles) S (179°) from Keeler, CA
    16 km (10 miles) ENE (59°) from Cartago, CA
    19 km (12 miles) NE (38°) from Olancha, CA
    28 km (17 miles) SE (140°) from Lone Pine, CA
    238 km (148 miles) W (276°) from Las Vegas, NV
    Location Uncertainty horizontal +/- 0.3 km (0.2 miles); depth +/- 0.7 km (0.4 miles)
    Parameters Nph= 44, Dmin=18 km, Rmss=0.18 sec, Gp= 50°,
    M-type=local magnitude (ML), Version=z
    Source California Integrated Seismic Net:
    Event ID ci14978940

  36. E.M.Smith says:

    Mexico picks up a 5.8 and Japan has a 6.1 out on the fault line under the sea:

    Magnitude 5.8 – GUERRERO, MEXICO
    2011 May 05 13:24:06 UTC

    This event has been reviewed by a seismologist.Magnitude 5.8
    Date-Time Thursday, May 05, 2011 at 13:24:06 UTC
    Thursday, May 05, 2011 at 08:24:06 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 16.808°N, 98.592°W
    Depth 10.2 km (6.3 miles)
    Distances 126 km (78 miles) SE of Chilpancingo, Guerrero, Mexico
    138 km (85 miles) E of Acapulco, Guerrero, Mexico
    140 km (86 miles) SW of Huajuapan de Leon, Oaxaca, Mexico
    295 km (183 miles) SSE of MEXICO CITY, D.F., Mexico
    Location Uncertainty horizontal +/- 16.6 km (10.3 miles); depth +/- 2.6 km (1.6 miles)
    Parameters NST=321, Nph=324, Dmin=83.5 km, Rmss=0.68 sec, Gp= 58°,
    M-type=regional moment magnitude (Mw), Version=8
    Source USGS NEIC (WDCS-D)
    Event ID usc000362l

    I think this one is just an aftershock of the prior great quake? It’s about the right place and a great quake can have aftershocks for a very long time.

    2011 May 05 14:58:21 UTC

    This event has been reviewed by a seismologist.Magnitude 6.1
    Date-Time Thursday, May 05, 2011 at 14:58:21 UTC
    Friday, May 06, 2011 at 12:58:21 AM at epicenter
    Time of Earthquake in other Time Zones
    Location 38.173°N, 144.040°E
    Depth 24.2 km (15.0 miles)
    Distances 276 km (171 miles) E of Sendai, Honshu, Japan
    302 km (187 miles) ESE of Morioka, Honshu, Japan
    305 km (189 miles) ENE of Iwaki, Honshu, Japan
    471 km (292 miles) NE of TOKYO, Japan
    Location Uncertainty horizontal +/- 15.3 km (9.5 miles); depth +/- 7.1 km (4.4 miles)
    Parameters NST=354, Nph=354, Dmin=434.1 km, Rmss=0.63 sec, Gp= 32°,
    M-type=regional moment magnitude (Mw), Version=8
    Source USGS NEIC (WDCS-D)
    Event ID usc000365q

  37. vukcevic says:

    Now NASA’s JPL says there is a link between earthquakes and the ionosphere. I am not sure they got cause –consequence relationship the right way around.

    On the subject: it appears there is a build-up of quakes volume during the last 2-3 weeks.

Comments are closed.