Quake Watch 2011

[atsimg]http://files.abovetopsecret.com/images/member/11de996833e3.jpg[/atsimg]

yikes?!?! should we be concerned here?

reply to post by berkeleygal


Been quite a few...

The Los Angeles quake and then the many Baja California ones.....very close in time and increasing in intensity...

very short period of time

reply to post by berkeleygal


There have been a few clusters like this since the 7.2 a year or so ago, most have fizzled out, but definitely 'worth watching'

reply to post by muzzy


You are right, the Antarctica plate is a cap on all the other neighbouring plates.
Just interesting that the recent series of quakes in NZ seems to have a co-conspirator in the Sandwich islands.

Being 8,000 km apart makes it unlikely

But, (A pure hypothesis) if one do consider the whole AA plate getting lighter say in the region of Takahe; then the Pacific plate would have less resistance to move South - which would possibly be a sort of clockwise rotation. That then will grind the Nazca plate like a gear wheel Anti-clockwise. If the scale of these events were smaller than the 8,000 km I would have more merits but the Eight to Ten thousand km scale makes it a bit mind boggling to accept
- For me too!

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

Location 35.617°N, 140.452°E
Depth 42.9 km (26.7 miles)
Region NEAR THE EAST COAST OF HONSHU, JAPAN
Distances 64 km (40 miles) E (95°) from TOKYO, Japan
83 km (52 miles) S (182°) from Mito, Honshu, Japan
152 km (94 miles) SE (125°) from Maebashi, 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 U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver

Event ID usc0002w98

USGS

just realized this one had been mentioned (6.0 near Honshu)
I do think however that this new 6.1 near Tokyo may not be another aftershock. Looks to me IMHO that this could be what everyone keeps talking about with the triad stirring. Tokyo REALLY needs to start paying attention.

reply to post by avatar22


Yep,looks like a new one,see here:

6.1 2011/04/21 13:37:04 35.617 140.452 42.9 NEAR THE EAST COAST OF HONSHU, JAPAN
4.9 2011/04/21 13:47:13 35.762 140.704 46.1 NEAR THE EAST COAST OF HONSHU, JAPAN
4.7 2011/04/21 13:54:02 35.602 140.531 52.9 NEAR THE EAST COAST OF HONSHU, JAPAN


Source - USGS

OT: Darn,ATS is pretty slow atm...

reply to post by Shenon


Hi Shenon. Not sure what you want me to say. Yes it would seem there were two small shocks associated with the 6.1 which occurred very rapidly afterwards.

Since all three of these events are being carried by USGS and EMSC i would imagine them to be correct. I have just checked them out on JMA and they are all there as well.

By the way they are 6.0, 4.5 and 4.6 on JMA

Originally posted by PuterMan
reply to post by Shenon

 

Hi Shenon. Not sure what you want me to say. Yes it would seem there were two small shocks associated with the 6.1 which occurred very rapidly afterwards.

Since all three of these events are being carried by USGS and EMSC i would imagine them to be correct. I have just checked them out on JMA and they are all there as well.

By the way they are 6.0, 4.5 and 4.6 on JMA

edit on 21/4/2011 by PuterMan because: (no reason given)

Not an Aftershock then? This would make it the second new Quake after the 9.0 (the other Not-Aftershock was just a little bit to the North,gonna see if i can find the other one again)

Edit: Here it is.

First the Quake (the 7.1 one)


And the Aftershocks of it


Picture Source - USGS


Edit 2: NVM
Edit 3: I´m counting 4 Aftershocks on JMA so far 6.0 4.5 4.5 3.2 and 4.3

2.6 WASHINGTON47.72°N -120.02°W 5Km Deep 2011-04-21 08:51:28 UTC2011-04-21 01:51:28 LOCAL UW04210851

earthquake.usgs.gov...

Has it really been five hours since the last quake large enough to be registered with USGS?

Yikes....

ETA...Hawthorne is the only place in the states to have a micro quake in over an hour...wierd.

Is the tension building, or dying down??

reply to post by westcoast


I noticed that too. It seems odd that no earthquakes at or above 2.5 in the world have occurred in the last almost 6 hours.

Oh except Washington, that isn't on USGS now. (was it downgraded?) Maybe it's just a USGS thing.

Another one for Los Angeles.....

2.8 GREATER LOS ANGELES AREA, CALIFORNIA34.07°N -117.28°W 18Km Deep 2011-04-21 03:13:36 UTC2011-04-20 20:13:36 LOCAL CI10930029


There was one late last night also......

Thursday April 21 2011, 23:56:03 UTC 16 minutes ago Nevada 1.5 6.3 Detail
Thursday April 21 2011, 23:53:19 UTC 18 minutes ago Oregon 2.1 7.7 Detail
Thursday April 21 2011, 23:43:00 UTC 29 minutes ago Southern California 1.8 7.8 Detail
Thursday April 21 2011, 23:35:52 UTC 36 minutes ago Nevada 1.4 4.0 Detail
Thursday April 21 2011, 23:34:29 UTC 37 minutes ago Central Alaska 1.7 80.4 Detail

and then

18 minutes ago Southern Yukon Territory, Canada 4.2 15.4

quakes.globalincidentmap.com...

This area is pretty active tonight

This is a computer-generated message -- this event has not yet been reviewed by a seismologist.


Magnitude
3.4
Date-Time
Friday, April 22, 2011 at 01:32:14 UTC
Thursday, April 21, 2011 at 06:32:14 PM at epicenter
Time of Earthquake in other Time Zones
Location
40.810°N, 123.960°W
Depth
24.2 km (15.0 miles)
Region
NORTHERN CALIFORNIA
Distances
8 km (5 miles) SSE (163°) from Blue Lake, CA
12 km (8 miles) SE (124°) from Arcata, CA
14 km (9 miles) E (81°) from Myrtletown, CA
17 km (11 miles) E (83°) from Eureka, CA
329 km (204 miles) NW (320°) from Sacramento, CA
Location Uncertainty
horizontal +/- 0.4 km (0.2 miles); depth +/- 0.7 km (0.4 miles)
Parameters
Nph= 20, Dmin=6 km, Rmss=0.13 sec, Gp= 76°,
M-type=local magnitude (ML), Version=2
Source
California Integrated Seismic Net:
USGS Caltech CGS UCB UCSD UNR
Event ID
nc71562581

earthquake.usgs.gov...

[atsimg]http://files.abovetopsecret.com/images/member/8c8671fbf13b.jpg[/atsimg]

There is some activity with Mount St. Helens. Here are 2 seismograms:


St. Helens - Old Dome


St. Helens - Crater BB


Source

4.7 2011/04/22 03:12:54 38.558 141.806 34.0 NEAR THE EAST COAST OF HONSHU, JAPAN
4.7 2011/04/22 02:57:39 -34.684 -71.438 47.6 LIBERTADOR O'HIGGINS, CHILE

earthquake.usgs.gov...

10 minutes ago Baja California, Mexico 3.3 6.8 depth
quakes.globalincidentmap.com...

reply to post by berkeleygal


If it helps any, here are the Chile and Honshu quakes for the past 7 days side by side.

[atsimg]http://files.abovetopsecret.com/images/member/326ffb569141.png[/atsimg]

[atsimg]http://files.abovetopsecret.com/images/member/f3c361360076.jpg[/atsimg]

I can't say that I see anything more than a coincidental relationship.

reply to post by PuterMan

I can't say that I see anything more than a coincidental relationship.

yup