Quake Watch 2011

20 minutes ago, north of the North Chatham Slope (Rise)

Reference Number 3493233
Universal Time April 7 2011 at 7:16
NZ Standard Time Thursday, April 7 2011 at 7:16 pm
Latitude, Longitude 42.20°S, 177.45°E
Focal Depth 33 km
Richter magnitude 5.2
Region Hikurangi Trough
Location
* 180 km south-east of Castlepoint
* 190 km south-east of Tinui
* 200 km south-east of Masterton
* 240 km south-east of Wellington

www.geonet.org.nz...

usgs have picked it up too, 5.1mb
earthquake.usgs.gov...

Pretty wimpy trace on BHZ, but quite a long P wave
www.iris.edu...

the NZ siesmos in the South Island show 2 pulses

eg
www.geonet.org.nz...

reply to post by thinkingthing


That earthquake, as well as two others in California yesterday, have all disappeared from the lists on that site.(earthquake.usgs.gov...)
What is that all about??

reply to post by coquine

Na its still there, been downgraded

3.9 2011/04/05 11:56:50 36.072 -121.624 10.7 OFFSHORE CENTRAL CALIFORNIA

Magnitude 6.5 Date-Time * Thursday, April 07, 2011 at 13:11:24 UTC * Thursday, April 07, 2011 at 08:11:24 AM at epicenter Location 17.431°N, 93.978°W Depth 167.4 km (104.0 miles) Region VERACRUZ, MEXICO Distances * 57 km (35 miles) S (169°) from Las Choapas, Veracruz, Mexico * 79 km (49 miles) SSE (168°) from Agua Dulce, Veracruz, Mexico * 79 km (49 miles) SW (234°) from Huimanguillo, Tabasco, Mexico * 84 km (52 miles) SE (137°) from Minatitl�n, Veracruz, Mexico * 483 km (300 miles) NW (311°) from GUATEMALA CITY, Guatemala Location Uncertainty horizontal +/- 16 km (9.9 miles); depth +/- 9.5 km (5.9 miles) Parameters NST=389, Nph=390, Dmin=233.8 km, Rmss=1.16 sec, Gp= 72°, 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 usc0002kru

source

reply to post by herenow


6.7 magnitude earthquake strikes Veracruz, Mexico; reports of buildings swaying 250 miles away in Mexico City 1.usa.gov...
twitter.com...#!/breakingnews

info in spanish pouring in twitter if you search for veracruz

I've been watching Japanese Live TV and there's been a large quake and a tsunami warning.

earthquake.usgs.gov...

Magnitude 7.4
Date-Time Thursday, April 07, 2011 at 14:32:41 UTC
Thursday, April 07, 2011 at 11:32:41 PM at epicenter

Location 38.253°N, 141.640°E
Depth 25.6 km (15.9 miles)
Region NEAR THE EAST COAST OF HONSHU, JAPAN
Distances 66 km (41 miles) E (90°) from Sendai, Honshu, Japan
118 km (73 miles) ENE (60°) from Fukushima, Honshu, Japan
147 km (91 miles) NNE (26°) from Iwaki, Honshu, Japan
333 km (207 miles) NNE (30°) from TOKYO, Japan

Location Uncertainty horizontal +/- 13.1 km (8.1 miles); depth +/- 7.2 km (4.5 miles)
Parameters NST=426, Nph=427, Dmin=358.4 km, Rmss=0.75 sec, Gp= 32°,
M-type=regional moment magnitude (Mw), Version=B
Source U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver

Event ID usc0002ksa

Source

Wait - 1 or 2??

7.4 2011/04/07 14:32:41 38.253 141.640 25.6 NEAR THE EAST COAST OF HONSHU, JAPAN
MAP 7.4 2011/04/07 14:32:00 38.200 142.000 40.0 NEAR THE EAST COAST OF HONSHU, JAPAN
Source

reply to post by Anmarie96


Too big to be an Aftershock,isn´t it? Also is this on the same Spot as the 9.0?

German News Reporter said the even felt it in Tokyo,pretty long shake apparently.

The USGS is showing two seperate ones, with two different ID numbers and two different depths.

CNN just stated it's one quake, with the depth "adusted" to 16 miles deeps. So if it really is ONE quake, why are there two different ID numbers?!?!?

WHOA


And i just saw a thread about a 6.5 magnitude in Mexico today too.

reply to post by ButterCookie


My bad..saying Mexico quake got just upgraded to a 6.7

I think there was only one 7.4 M. The USGS has removed one. And according to Japanese TV, they are only reporting one earthquake, not two.

according to the global incident map, there were 3

Thursday April 7 2011, 14:32:41 UTC 45 minutes ago near the east coast of Honshu, Japan 7.4 25.6 Detail
Thursday April 7 2011, 14:32:00 UTC 46 minutes ago near the east coast of Honshu, Japan 7.4 40.0 Detail
Thursday April 7 2011, 14:32:00 UTC 46 minutes ago near the east coast of Honshu, Japan 7.4 40.0 Detail
link quakes.globalincidentmap.com...

must be an oversight?

03.11.2011 Mag 9.0



04.07.2011 Mag 7.4



Very Close...

Source - USGS

Could this 7.1 'aftershock' actually be a preshock?

COuld we be expecting a 'big one' in a few days?

Originally posted by Skellon
Could this 7.1 'aftershock' actually be a preshock?

COuld we be expecting a 'big one' in a few days?

Very good point that hasn't been considered

I was reading a few sources that stated that this one was more thank likely NOT an aftershock of the 9.0 quake.

reply to post by ButterCookie


It is an aftershock by the normal definition.

Anything up to about 1 magnitude below the main shock thus you can have up to 8.0 and it would still be an aftershock.

Bigger than that and I think a seismologist would need to give a judgement. I believe even the 8.5 on the 28 Mar 2005 after Banda Aceh was considered to be an aftershock.

Speaking of aftershocks - The 7.1 should have given us a few larger one's by now IMHO. Makes me kinda on edge here that we haven't had any -- yet......... I am afraid that while that 7.1 was an aftershock it may also be a foreshock.