Quakes – California and South America

We’ve got a quake in South America – 6.1 in Argentina (which seems a bit odd) along with a 4.0 that the news is saying was in “San Francisco” but the map shows it in the East Bay (on that Hayward / Calaveras side I’ve been worrying for a year or three now… so the question now is: “One and done? Or Foreshock?”…) This one is on the Hayward that runs right through the heart of U.C. Berkeley.

Magnitude 6.1 – SANTIAGO DEL ESTERO, ARGENTINA
2012 March 05 07:46:09 UTC

Earthquake Details
This event has been reviewed by a seismologist.Magnitude 6.1
Date-Time Monday, March 05, 2012 at 07:46:09 UTC
Monday, March 05, 2012 at 04:46:09 AM at epicenter
Time of Earthquake in other Time Zones
Location 28.227°S, 63.242°W
Depth 550 km (341.8 miles)
Region SANTIAGO DEL ESTERO, ARGENTINA
Distances 47 km (29 miles) WNW of Anatuya, Santiago del Estero, Argentina
112 km (69 miles) ESE of Santiago del Estero, Argentina
250 km (155 miles) SE of San Miguel de Tucuman, Tuc., Argentina
828 km (514 miles) NNW of BUENOS AIRES, D.F., Argentina
Location Uncertainty horizontal +/- 15.1 km (9.4 miles); depth +/- 7.6 km (4.7 miles)
Parameters NST=660, Nph=681, Dmin=622.3 km, Rmss=0.62 sec, Gp= 29°,
M-type=regional moment magnitude (Mw), Version=8
Source Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID usb0008baw

Southern Hemisphere

A view of Earthquakes from the South Pole

A view of Earthquakes from the South Pole

Original Image with Clickable Details

Quake San Franciso East Bay 5 Mar 2012

Quake San Franciso East Bay 5 Mar 2012

You also get a nice view of the large number of small quakes in the upper left where the hot springs at Calistoga sit on top of old volcanism… This is a static image capture. You can ‘click through’ the link under the California map at the bottom of a live view close up.

Magnitude 4.0 – SAN FRANCISCO BAY AREA, CALIFORNIA
2012 March 05 13:33:20 UTC

Earthquake Details
This event has been reviewed by a seismologist.Magnitude 4.0
Date-Time Monday, March 05, 2012 at 13:33:20 UTC
Monday, March 05, 2012 at 05:33:20 AM at epicenter
Time of Earthquake in other Time Zones
Location 37.929°N, 122.303°W
Depth 9.2 km (5.7 miles)
Region SAN FRANCISCO BAY AREA, CALIFORNIA
Distances 1 km (1 miles) N (353°) from El Cerrito, CA
2 km (1 miles) SSE (152°) from East Richmond Heights, CA
3 km (2 miles) NW (319°) from Kensington, CA
7 km (4 miles) NNW (338°) from Berkeley, CA
16 km (10 miles) NNW (336°) from Oakland, CA
Location Uncertainty horizontal +/- 0.3 km (0.2 miles); depth +/- 0.8 km (0.5 miles)
Parameters Nph= 27, Dmin=7 km, Rmss=0.16 sec, Gp= 54°,
M-type=regional moment magnitude (Mw), Version=8
Source California Integrated Seismic Net:
USGS Caltech CGS UCB UCSD UNR
Event ID nc71746766

And yes, this size on a ‘fault near me’ puts me on the “quake prep” checklist for a day or two. A 6.x or 7.x on that fault and I’m likely to have some broken glass and / or electricity outage. Not much more. Still, a time to gas up the car, buy some extra food, check the batteries for the radio, print out some web pages to read ;-)

Northern Hemisphere

North Polar Earthquake Map

North Polar Earthquake Map

Original Image with Clickable Details

Asia and Russia

Asia Quake Map

Asia Quake Map

Original Image with clickable areas

Australia / New Zealand

This is a live 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

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

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.

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

California Quakes with fault lines

California Quakes with fault lines

Original Image
en.vedur.is/earthquakes-and-volcanism/articles/nr/2180

Map of Plates

You can see it is where plates collide here:

Plates Of The World

Plates Of The World

Original Image, and with other language options.

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/

USGS Page listing recent major quakes:

http://earthquake.usgs.gov/earthquakes/eqinthenews/

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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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25 Responses to Quakes – California and South America

  1. RickA says:

    E.M. Smith:

    I have really enjoyed reading your blog over the last year or so – both the stock market stuff and the global warming stuff.

    I really liked your checklists for emergencies, a printed them out and actually purchased stuff for my own disaster preparedness.

    I was wondering what your everyday carry is – if that is not too personal a question.

  2. Pascvaks says:

    I wonder if our 1930’s radio waves have reached another planet yet with intelligent somethings, has anyone tried to read all the seismic dots and dashes lately? Bet they’re telling us to make peace, not war, or be destroyed. Then again, on the other hand, they’re probably nothing but the shaking and quaking caused by inter-galactic gravity waves from supernovas hitting us from all directions; and the after effects of same as the cracks grind together. (It sure is a shame that nothing’s as simple as it looks or sounds, sure would make physics a lot easier;-)

  3. Rhoda R says:

    Pascvaks, I like the idea that the pattern of earthquakes is an alien intelligence trying to communicate with us. Could be the plot of an interesting sci fi novel.

  4. R. de Haan says:

    Just watched a documentary about Russia.
    A film crew paid a visit to a village in SW Siberia that was without seismic events until 2003 when it was bit by a magnitude 7.2 quake.
    See report here: ftp://152.1.40.200/array1/ftp/mongolia_papers/2003%20keck/earthquakes/Dorbath_etal_2008_Geological%20and%20Seismological%20field%20observations%20in%20the%20Epicentral%20region%20of%20the%202003%20M7.2%20Gorny%20Altay%20earthquake.pdf

    From that moment on the region is hit by quakes almost every day.

    Here you find the most recent quakes.
    http://www.iris.edu/seismon/zoom/events/?lon=95.983&lat=51.542

  5. E.M.Smith says:

    @Rick A:

    Well, since my ‘day job’ is trading from at home, my ‘everyday carry’ is my home ;-)

    The kits come in three basic layers. The smallest ‘hip pack’ is supposed to be with you at all times. That is now in a large pouch on my day pack that holds the laptop. You can see the full list in the kits. I’ve modified it a bit as I’ve been doing air travel since the kits were designed, so there’s a ‘pull out baggie’ that has any non-approved things in it (like the Swiss Army Knife) for quick conversion to “airplane friendly’. I’ve also got the cell phone and charger stuff and my ‘minimalist lighting kit’ in the bag. ( 100 watt inverter for car, small lamp cord type drop cord, plug to socket converter, 7 watt or so mini-light bulb about the size of a golf ball that’s plenty of light in an emergency – LED or CFL type. So I can charge cell phone or laptop and have a room full of light from any 12 volt car…)

    The ‘biggest kit’ is now pretty well ignored ( a few years of neglect….) so bits are more scattered around the house and garage (as things were taken out and used, then not put back in…). I’d originally made these when living in a rental property, so everything was made ‘ready to move’. Later, while in a full sized home, we were still under Soviet Nuclear Threat, so kits were kept ‘ready to go’. Now I’m old and threats are more diffuse ( i.e. not a ‘5 minutes to nuke’ siren ) so “mobility” is less important; which means I’ve been lax about keeping the kit “kitted”. All the stuff is here (somewhere ;-) so “good enough”…

    I have added a ‘travel kit’ that lives in a plastic tub. It has things like an electric skillet and miniature slow cooker in it. Stuff to make ‘living out of a hotel room’ easy and comfortable. Not exactly “emergency gear”… Basically a travel kitchen and bathroom kit.

    But, I suppose the most direct answer is just a broad description of my day pack.

    Main pouch has a laptop section and also gets a workbook / portfolio and several pens. Cell phone, and chargers for everything. Compact umbrella (and I carry a coat – always. Even in summer). Any ‘added things’ go in that pocket (books, gadgets, radio, lunch). The two outside pockets are divided: 1) PMK. Personal Maintenance Kit. Toothbrush, razor, soap, vitamins, medicines, first aid kit, bit of money, ear plugs, sewing kit, all that kind of small stuff you need to just get by. Including mini deck of cards. Oh, and a miniature LED flashlight lives on my hip or in a shirt pocket pretty much all the time. 2) Office. Check books, stapler, pens, tire pressure gauge, sometimes a tread depth gauge, ear buds / headsets, swiss army knife, miniature ‘leatherman’ style tool, and some other odds and ends that have accumulated.

    I ‘grab and go’ with that bag for any exit. In the car is a ‘car kit’ with the usual car emergency stuff, some added tools, air pump, big flashlight, jumper cables, etc. Sometimes I have the “travel kit” loaded in the car. Sometimes it’s sitting 60 seconds away. It has all the stuff needed for living in a hotel on the road and / or cooking in a camp grounds (So, in theory, I could get a call to “be at site FOO for a job” and have the car ready to be “on the road” for an indefinite period of time in about 3 minutes. ( 1 to load the travel / hotel kit. 1 to load the clothes suitcase. 1 to check the house as I exit with my backpack et. al.).

    We typically have a ‘flat of water’ in the house, so I’ll grab some bottles of water if needed. There’s about 150 gallons in large ‘quake barrels’ in the back yard… And the generator is on the back patio with the BBQ near the outdoors fridge and freezer… and the Big Tent Box with the “life after the house falls down” stuff… (Portapotty, larger stove, propane lamp, sleeping bags, etc.)

    Not quite as ‘neat’ as it once was, but workable.

    I was more careful about ‘kit’ contents when I was a 1 hour drive away from home most of the day 5 or 6 days a week. Now not so much…

    @Pascvaks:

    Nearest star is 4.x light years, so early radio is well beyond it. Biggest problem is inverse square decay. There’s likely planets around almost all stars, and life will be common. But… Take that inverse square and the odds of something that’s not a collimated light beam being detected are near zero “right quick”… Even for Voyager with a parabolic antenna pointed at us and inside the solar system it took a giant parabolic antenna on the ground to pick out the signal. At 1 light year it’s basically nothing. Though they might be able to see a nuclear flash from the bomb testing…

    @all:

    SF Tides Chart shows we’re coming up on a high tide about 10 March:

    March 2012 3
    ——————————————————————————-
    PST
    ——————————————————————————-
    # High Low High Low
    1 Thu 0451 5.2 1216 0.9 1956 3.9
    ——————————————————————————-
    # Low High Low High
    2 Fri 0001 3.2 0555 5.3 1316 0.6 2045 4.2
    3 Sat 0108 3.0 0658 5.4 1405 0.4 2121 4.4
    4 Sun 0202 2.7 0757 5.6 1447 0.1 2152 4.7
    5 Mon 0248 2.3 0850 5.8 1525 -0.1 2221 5.0
    6 Tue 0331 1.9 0941 6.0 1602 -0.1 2251 5.4
    7 Wed 0414 1.3 1030 6.0 1638 0.0 2322 5.7
    8 Thu 0458 0.8 1120 5.9 1715 0.2 2355 6.0
    9 Fri 0543 0.4 1211 5.7 1754 0.6
    ——————————————————————————-
    # High Low High Low
    10 Sat 0030 6.2 0632 0.0 1306 5.3 1835 1.0
    ——————————————————————————-
    PDT begins March 11 at 0200 hours
    ——————————————————————————-
    11 Sun 0109 6.3 0824 -0.2 1506 4.9 2019 1.6
    12 Mon 0253 6.3 0921 -0.2 1614 4.5 2111 2.1
    13 Tue 0342 6.2 1025 -0.2 1733 4.3 2214 2.5
    14 Wed 0440 6.0 1136 -0.1 1859 4.3 2334 2.8
    15 Thu 0548 5.8 1250 0.0 2016 4.5
    ——————————————————————————-
    # Low High Low High
    16 Fri 0059 2.7 0701 5.6 1359 0.0 2116 4.7
    17 Sat 0215 2.5 0813 5.6 1457 0.0 2203 5.0
    18 Sun 0316 2.1 0918 5.6 1546 0.1 2243 5.2
    19 Mon 0408 1.7 1014 5.6 1627 0.2 2318 5.4
    20 Tue 0453 1.3 1104 5.5 1704 0.4 2348 5.5

    from:

    http://wolfweb.unr.edu/homepage/edc/tides/2012/sfgg_fr12.html

    I note that we had a very low low tide just about the time of the quake…

  6. E.M.Smith says:

    Hmmm…. 4.7 offshore Mexico, so some more energy release headed up my way. Probably about a month to creep up here…

    Magnitude 4.7 – REVILLA GIGEDO ISLANDS REGION
    2012 March 06 02:32:04 UTC

    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 4.7
    Date-Time Tuesday, March 06, 2012 at 02:32:04 UTC
    Monday, March 05, 2012 at 07:32:04 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 19.840°N, 109.113°W
    Depth 40.8 km (25.4 miles)
    Region REVILLA GIGEDO ISLANDS REGION
    Distances 229 km (142 miles) ENE of Socorro Island, Mexico
    340 km (211 miles) SSE of Cabo San Lucas, Baja Calif. Sur, Mexico
    414 km (257 miles) WSW of Puerto Vallarta, Jalisco, Mexico
    1043 km (648 miles) W of MEXICO CITY, D.F., Mexico
    Location Uncertainty horizontal +/- 27.6 km (17.1 miles); depth +/- 9.6 km (6.0 miles)
    Parameters NST=146, Nph=151, Dmin=434.1 km, Rmss=1.56 sec, Gp=119°,
    M-type=body wave magnitude (Mb), Version=3
    Source Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
    Event ID usb0008bz8

    @R. de Haan:

    Things tend to lock for a long time, then break, followed by a lot of slippage and smaller stuff for years, until it slowly locks up again… repeat….

    Occasionally you get a “one sharp one” of medium size before a Great Quake, Why I watch things like our recent 4.x on a mostly locked fault quite closely…. for a month or two. But it’s all fairly random. Lots of exceptions. So it could be the SF part of the San Andreas that goes next (as the Loma Prieta quake was the south part down near Santa Cruz only) or it could be the Hayward / Calaveras (as it has a history of letting loose a few years after the San Andreas) or it could be the Cascadia (that has not moved in a very long time to speak of…)

    Ah, life on the fault line ;-)

  7. George says:

    Another 4+ in the spreading zone off Oregon.

    Because these plate remnants are so small, I wonder if the strain at the subduction zone is so high that we are now seeing quakes at the spreading zone. In other words, there isn’t enough crust to absorb the compression over the length of the plate so I wonder if we are seeing the subduction zone fighting the spreading zone a bit here. If that’s the case, it might be possible that we could be witnessing a spreading zone transitioning into a subduction zone. The remaining plate remnant gets so jammed against the NA plate that the Pacific plate begins to subduct at what used to be a spreading zone. The spreading zone turns into a volcanic arc and basically, the Cascades transition East to a position off the coast of Oregon. But if we start seeing some 5.x in the subduction zone, Katy bar the door.

  8. E.M.Smith says:

    @George:

    Yup, on the spreading fault:

    http://earthquake.usgs.gov/earthquakes/recenteqsww/Maps/10/230_45.php

    Magnitude 4.4 – OFF THE COAST OF OREGON
    2012 March 06 07:13:26 UTC
    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 4.4
    Date-Time Tuesday, March 06, 2012 at 07:13:26 UTC
    Monday, March 05, 2012 at 10:13:26 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 44.095°N, 129.386°W
    Depth 10.3 km (6.4 miles)
    Region OFF THE COAST OF OREGON
    Distances 424 km (263 miles) WNW of Coos Bay, Oregon
    429 km (266 miles) W of Newport, Oregon
    473 km (293 miles) WNW of Brookings, Oregon
    514 km (319 miles) W of SALEM, Oregon
    Location Uncertainty horizontal +/- 18.5 km (11.5 miles); depth +/- 2.9 km (1.8 miles)
    Parameters NST=167, Nph=177, Dmin=430.8 km, Rmss=1.41 sec, Gp= 94°,
    M-type=body wave magnitude (Mb), Version=5
    Source Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
    Event ID usb0008c12

    I’d suspect that more likely we just don’t have as clean a separation between ‘spreading’ and ‘subduction’ as is generally thought.

    We’ve got a whole spherical globe of chunks, all jostling. The N.A. plate has rotation, too. At the small plate area, sometimes It’s spreading on it’s own, sometimes It’s jammed (either by the Pacific Plate not moving much, so the spreading jams it into N. America or by the N.A. plate rotating, or by the Mid-Atlantic or Arctic spreading zones jamming N.Am over…) and as things jiggle, wiggle, jam and rotate, quakes happen. Wherever a chunk gets stuck or unstuck…

    Basically, I just think it’s not a very neat process… Especially around the Ring Of Fire…

    Then add some lunar tidal heaving, and I could easily see subduction and spreading zones both having uplift and drop causing grinding and quaking… Same thing at old faults like New Madrid.

    Oh, and remember all that ‘sideways slip’ of the San Andreas has to be absorbed into something out to sea ;-)

  9. adolfogiurfa says:

    Please be attentive: The other danger point is while the Moon is at either
    of the maximum declination positions north and south of the equator. The Moon is at those positions for about three days and does place considerable strain on the tectonic plates while there. It must be remembered that the Moon is always on the move and a quake can happen at any time. Perigee has a grander tide too

    Well, everything is served on the plate!:
    2012-03-08 22:15:35 UT
    Ephemeris:

    Right Distance From 47°N 7°E:
    Ascension Declination (AU) Altitude Azimuth
    Sun 23h 18m 35s -4° 27.2′ 0.993 -43.501 149.396 Set
    Mercury 0h 17m 51s +4° 43.5′ 0.825 -29.060 137.227 Set
    Venus 2h 4m 2s +14° 21.3′ 0.849 -6.754 119.541 Set
    Moon 11h 37m 27s -2° 46.7′ 57.8 ER 35.058 -32.931 Up
    Mars 10h 58m 39s +10° 58.4′ 0.675 51.289 -26.909 Up
    Jupiter 2h 25m 47s +13° 27.2′ 5.568 -4.160 114.836 Set
    Saturn 13h 50m 40s -8° 29.6′ 8.930 13.395 -61.446 Up
    Uranus 0h 14m 22s +0° 48.1′ 21.031 -32.933 135.979 Set
    Neptune 22h 14m 3s -11° 32.0′ 30.946 -54.219 170.579 Set
    Pluto 18h 38m 33s -19° 14.9′ 32.524 -42.042 -108.429 Set

    Enjoy it!

  10. Pingback: Solar flares | LOVE FREEDOM TRUTH

  11. E.M.Smith says:

    California has dropped below 400 to 385 so we’re having fewer, but not all places are slowing down… Japan is having a cluster of 5.x quakes, so that side of the Pacific looks like what’s moving this week… Looking at the USA map:
    http://earthquake.usgs.gov/earthquakes/recenteqsus/
    has the center / east rather quiet, yet Alaska and Hawaii and Puerto Rico are just covered in dots. The “action” is where islands are rising or where the island chain of the Aleutians “pivots’ onshore Alaska. I wonder if the mechanism for Island volcanism is driven differentially to the main fault slippage?

    Vanuatu picked up another one:

    Magnitude 6.7 – VANUATU
    2012 March 09 07:09:53 UTC

    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 6.7
    Date-Time Friday, March 09, 2012 at 07:09:53 UTC
    Friday, March 09, 2012 at 06:09:53 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 19.115°S, 169.643°E
    Depth 31.7 km (19.7 miles)
    Region VANUATU
    Distances 61 km (37 miles) NE of Isangel, Tanna, Vanuatu
    206 km (128 miles) SE of PORT-VILA, Efate, Vanuatu
    325 km (201 miles) NE of Tadine, Loyalty Islands, New Caledonia
    1934 km (1201 miles) ENE of BRISBANE, Queensland, Australia
    Location Uncertainty horizontal +/- 13.8 km (8.6 miles); depth +/- 4.7 km (2.9 miles)
    Parameters NST=474, Nph=481, Dmin=467.5 km, Rmss=0.76 sec, Gp= 18°,
    M-type=”moment” magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=B
    Source Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
    Event ID usb0008e4z

  12. adolfogiurfa says:

    @E.M.: …Puerto Rico are just covered in dots. Good observation! Nobody has paid attention to this, however this is happening since the 7.0 Richter earthquake in Haiti. As far as I know the South American continent is being pushed eastwards by the Nazca plate and it is pushing upwards (northwards) those islands to the abyss in front of them.

  13. adolfogiurfa says:

    Nazca plate pushing ahead:
    Earthquake Details

    This event has been reviewed by a seismologist.
    Magnitude
    4.9
    Date-Time
    Friday, March 09, 2012 at 02:03:32 UTC
    Thursday, March 08, 2012 at 09:03:32 PM at epicenter
    Time of Earthquake in other Time Zones
    Location
    8.538°S, 80.270°W
    Depth
    32 km (19.9 miles)
    Region
    OFF THE COAST OF NORTHERN PERU
    Distances
    144 km (89 miles) WSW of Trujillo, Peru
    195 km (121 miles) WNW of Chimbote, Peru
    200 km (124 miles) SSW of Chiclayo, Peru
    524 km (325 miles) NW of LIMA, Peru

  14. adolfogiurfa says:

    @E.M.: The moon approaching its perigee is now going southwards:
    Moon 11h 46m 7s (RA) -3° 38.7′(Latitude) 57.7 ER (earths´ radii)
    http://www.fourmilab.ch/cgi-bin/Solar

  15. tckev says:

    Magnitude 7.1 Earthquake Strikes off VANUATU – March 9, 2012

    Magnitude 7.1
    Date-Time Friday, March 09, 2012 at 07:09:54 UTC
    Friday, March 09, 2012 at 06:09:54 PM at epicenter

    Location 19.109°S, 169.625°E
    Depth 36.8 km (22.9 miles)
    Region VANUATU
    Distances 61 km (37 miles) NE of Isangel, Tanna, Vanuatu
    206 km (128 miles) SE of PORT-VILA, Efate, Vanuatu
    325 km (201 miles) NE of Tadine, Loyalty Islands, New Caledonia
    1934 km (1201 miles) ENE of BRISBANE, Queensland, Australia
    Location Uncertainty horizontal +/- 14.8 km (9.2 miles); depth +/- 9.2 km (5.7 miles)
    Parameters NST= 90, Nph= 91, Dmin=466.4 km, Rmss=0.94 sec, Gp= 29°,
    M-type=regional moment magnitude (Mw), Version=7
    Source Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
    Event ID usb0008e4z

  16. E.M.Smith says:

    Well… That Vanuatu business is what? About the 3rd or 4th of ‘near 7ish’ in just a year or two?

    Something is afoot… I think we’re going to get a ‘relight’ of a lot of those Pacific Volcanic Islands you see in pictures and paintings from the 1700s and 1800s…

  17. E.M.Smith says:

    Looks like they downgraded it to a bit below 7 now (not the event numbers match)

    Magnitude 6.7 – VANUATU
    2012 March 09 07:09:53 UTC

    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 6.7
    Date-Time Friday, March 09, 2012 at 07:09:53 UTC
    Friday, March 09, 2012 at 06:09:53 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 19.115°S, 169.643°E
    Depth 31.7 km (19.7 miles)
    Region VANUATU
    Distances 61 km (37 miles) NE of Isangel, Tanna, Vanuatu
    206 km (128 miles) SE of PORT-VILA, Efate, Vanuatu
    325 km (201 miles) NE of Tadine, Loyalty Islands, New Caledonia
    1934 km (1201 miles) ENE of BRISBANE, Queensland, Australia
    Location Uncertainty horizontal +/- 13.8 km (8.6 miles); depth +/- 4.7 km (2.9 miles)
    Parameters NST=474, Nph=481, Dmin=467.5 km, Rmss=0.76 sec, Gp= 18°,

    M-type=”moment” magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=B
    Source Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
    Event ID usb0008e4z

  18. adolfogiurfa says:

    @E.M. It seems those downgrades happen always after the USGS is told not to excessively scare the locals.

  19. tckev says:

    Downgraded already. Well reports say there’s no damage and no injuries but I suppose all that can change.

  20. E.M.Smith says:

    California continues dropping down to 376 count now (last 2 weeks). Even as we approach a high tidal force time (per the above tide charts).

    So this ought to mean a surge in quake counts in the next week (as fewer drop off the ‘two week ago’ end and ‘more new ones’ show up… if tides are really influential… Then again, I’m not paying any attention to the whole perigee thing…

    At any rate, South America picked up a couple of small ones off the Peru / Chile area ( 5 ish) and otherwise the ‘low tides’ last week or so have been modest quake counts. Wonder if there is any time lag to look at? If it takes a few days or even a week of high tides to ‘work things loose’?

    For now, the quake under Berkeley is looking like “one and done”… which is good news for me as I’m not wishing to use my quake kit any time soon ;-)

  21. E.M.Smith says:

    Offshore Japan has picked up another big one. A 6.9, so much smaller than the Fukashima Great Quake, but still a major event. (But well off shore):

    Magnitude 6.9 – OFF THE EAST COAST OF HONSHU, JAPAN
    2012 March 14 09:08:37 UTC

    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 6.9
    Date-Time Wednesday, March 14, 2012 at 09:08:37 UTC
    Wednesday, March 14, 2012 at 07:08:37 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 40.899°N, 144.923°E
    Depth 26.6 km (16.5 miles)
    Region OFF THE EAST COAST OF HONSHU, JAPAN
    Distances 235 km (146 miles) S of Kushiro, Hokkaido, Japan
    265 km (164 miles) SSE of Obihiro, Hokkaido, Japan
    293 km (182 miles) E of Hachinohe, Honshu, Japan
    734 km (456 miles) NE of TOKYO, Japan
    Location Uncertainty horizontal +/- 14.5 km (9.0 miles); depth +/- 7.8 km (4.8 miles)
    Parameters NST=228, Nph=228, Dmin=192.6 km, Rmss=0.94 sec, Gp= 36°,
    M-type=teleseismic moment magnitude (Mw), Version=A
    Source Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
    Event ID usb0008gs0

  22. E.M.Smith says:

    Looks like S. America has paused this week while the activity moved to Mexico. So a week or two more to reach me? :-)

    Magnitude 5.4 – OFFSHORE CHIAPAS, MEXICO
    2012 March 13 23:06:48 UTC
    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 5.4
    Date-Time Tuesday, March 13, 2012 at 23:06:48 UTC
    Tuesday, March 13, 2012 at 05:06:48 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 15.099°N, 92.932°W
    Depth 84.5 km (52.5 miles)
    Region OFFSHORE CHIAPAS, MEXICO
    Distances 74 km (45 miles) WNW of Tapachula, Chiapas, Mexico
    139 km (86 miles) SE of Tonala, Chiapas, Mexico
    153 km (95 miles) SW of Comitan, Chiapas, Mexico
    817 km (507 miles) SE of MEXICO CITY, D.F., Mexico
    Location Uncertainty horizontal +/- 17.7 km (11.0 miles); depth +/- 8.9 km (5.5 miles)
    Parameters NST=371, Nph=378, Dmin=621.2 km, Rmss=1.2 sec, Gp=137°,
    M-type=body wave magnitude (Mb), Version=8
    Source Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
    Event ID usb0008gln

  23. E.M.Smith says:

    Major Quake in Mexico, near the coast so less populated than some areas, still, likely to be damage:
    Magnitude 7.6 – OAXACA, MEXICO
    2012 March 20 18:02:48 UTC
    Earthquake Details
    This event has been reviewed by a seismologist.Magnitude 7.6
    Date-Time Tuesday, March 20, 2012 at 18:02:48 UTC
    Tuesday, March 20, 2012 at 12:02:48 PM at epicenter
    Time of Earthquake in other Time Zones
    Location 16.662°N, 98.188°W
    Depth 17.5 km (10.9 miles)
    Region OAXACA, MEXICO
    Distances 136 km (84 miles) SSW of Huajuapan de Leon, Oaxaca, Mexico
    162 km (100 miles) WSW of Oaxaca, Oaxaca, Mexico
    170 km (105 miles) SE of Chilpancingo, Guerrero, Mexico
    322 km (200 miles) SSE of MEXICO CITY, D.F., Mexico
    Location Uncertainty horizontal +/- 15.8 km (9.8 miles); depth +/- 6.5 km (4.0 miles)
    Parameters NST=438, Nph=440, Dmin=312.8 km, Rmss=0.88 sec, Gp= 79°,
    M-type=regional moment magnitude (Mw), Version=9
    Source Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
    Event ID usc0008m6h

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