Quake Watch 2012

reply to post by ericblair4891


Hi Eric, I wasn't offended. You were quite correct in your generalisation, and I have seen it first hand regarding funding. I'm just glad that I like old dead things and mud and followed what interested me rather than the money. I have so many mates working in mines in both australia (sic) and New Zealand, as well as in mineral exploration. While I like getting out and about, money has never been the motivator for me and consequently I have lived on the bones of my arse for years until I became a Laboratory technician in a tertiary institution.

It's true though, the funding and the large-scale recruiting comes from the big mining and exploration companies such as Rio Tinto, Pells Sullivan Meynink, Oceania Gold, et cetera, while the rest of us have to make do with the crumbs.

I keep my ears open, but nobody seems to be talking.
However, over the weekend I spoke to a geophysicist friend of mine who has done some RADAR surveys around the red zones in Christchurch and his (unofficial) opinion is that the return interval of the major Christchurch earthquakes is a lot less than 16 000 years. He thinks it is reasonably 'common', but when pressed he wouldn't say. This is from someone who is a friend, so imagine people who don't have contacts trying to get information. It's like blood from a stone.

I may well investigate the presence of marine microfossils (foraminifera especially) in liquefaction material to try to obtain some dates, mostly of penultimate disturbance, I guess; and keep 'pressing' my mate to look for palaeo liquefaction tubes in the profiles (which he admitted he hadn't looked for; only the present day ones) and see if there is some sort of confinement we can come up with.

As a lowly technician, and in a field that is not as well patronised as the 'sexy big money' fields, I try to glean what I can from the Big Guys upstairs!

Also, Puterman (and Muzzy) you guys rock. Thanks so much for all your work. It is appreciated. Same with all you other contributors who I have left out. This is one of my favourite threads on this site.

Eric: Kia kaha, fella.

reply to post by autopat51


21 earthquakes since 1975 within a 50 km radius of that last one

CAT YEAR MO DA ORIG TIME LAT LONG DEP MAGNITUDE IEM DTSVNWG DIST
NFO km
TF

PDE 1975 07 07 204114.20 45.96 -118.25 5 3.0 MDSEA ... ....... 36
PDE 1979 04 08 072937.40 46.01 -118.42 4 3.2 MLGS 5F. ....... 22
PDE 1983 03 22 124701.50 46.12 -118.36 0 3.3 MLGS 4F. ....... 27
PDE 1989 01 27 124758.59 46.04 -118.70 10 2.8 MDSEA ... ....... 1
PDE 1991 11 28 010858.95 45.99 -118.32 9 4.3 MDSEA 4F. ....... 30
PDE 1991 12 15 221453.12 45.99 -118.33 8 3.3 MDSEA 4F. ....... 29
PDE 1992 07 14 200151.50 45.99 -118.31 11 4.1 MDSEA 4F. ....... 30
PDE 1992 09 23 043216.87 45.97 -118.39 5 2.8 MDSEA .F. ....... 25
PDE 1995 09 03 021321.54 45.90 -118.21 13 2.9 MDSEA ... ....... 41
PDE 1997 01 02 190358.49 45.86 -118.18 7 2.9 MDSEA ... ....... 45
PDE 1997 07 23 085715.40 45.99 -118.50 8 3.0 MLGS ... ....... 16
PDE 1997 12 21 022034.83 45.67 -118.83 3 2.6 MDSEA ... ....... 43
PDE 1998 03 23 233237.23 46.36 -118.85 26 2.7 MDSEA ... ....... 36
PDE 1999 03 10 165534.25 46.00 -118.48 5 2.6 MDSEA ... ....... 17
PDE 2000 09 06 065418.05 46.12 -118.46 0 3.0 MDSEA ... ....... 20
PDE 2003 02 23 075400.14 46.06 -118.79 8 2.6 MDSEA ... ....... 6
PDE 2004 02 28 020147.93 46.04 -119.02 1 3.3 MDSEA .F. ....... 24
PDE 2006 12 20 094326.58 46.10 -118.51 13 3.4 MDSEA ... ....... 15
PDE 2009 05 29 185404.39 45.92 -118.56 7 2.8 MDSEA ... ....... 18
PDE 2010 05 15 160613.28 45.75 -118.55 20 2.7 MLSEA ... ....... 35
PDE 2010 05 16 021517.26 45.73 -118.54 20 2.8 MDSEA ... ....... 37

NEIC Earthquake Search


Additional info

FILE CREATED: Tue Apr 10 23:26:31 2012
Circle Search Earthquakes= 21
Circle Center Point Latitude: 46.050N Longitude: 118.700W
Radius: 50.000 km
Catalog Used: PDE
Data Selection: Historical & Preliminary Data

BUT using another database there are 208 results with the same criteria.

NEIC: Earthquake Search Results

U. S. G E O L O G I C A L S U R V E Y

E A R T H Q U A K E D A T A B A S E



FILE CREATED: Tue Apr 10 23:30:39 2012
Circle Search Earthquakes= 208
Circle Center Point Latitude: 46.050N Longitude: 118.700W
Radius: 50.000 km
Catalog Used: SRA
Data Selection: Eastern, Central and Mountain States of U.S. (SRA)

Search results

And even the Canadian database reveals a few

FILE CREATED: Tue Apr 10 23:32:49 2012
Circle Search Earthquakes= 4
Circle Center Point Latitude: 46.050N Longitude: 118.700W
Radius: 50.000 km
Catalog Used: EPB
Data Selection: Canada (EPB)


CAT YEAR MO DA ORIG TIME LAT LONG DEP MAGNITUDE IEM DTSVNWG DIST
NFO km
TF

EPB 1893 03 06 1703 46.00 -119.00 5.3 EPB ... ....... 23
EPB 1936 07 16 070748 46.00 -118.30 5.7 EPB .F. ....... 31
EPB 1936 07 18 1630 46.00 -118.30 4.3 EPB .F. ....... 31
EPB 1936 08 04 0919 45.80 -118.60 4.3 EPB .F. ....... 28

Okay, so I still say we're in the lull. There's been that 5.8M. And then there were some 4's. So, I was hoping things would resume as usual and there would be nothing to observe except the seemingly randomness of it all. But there is something that I'm noticing in today's quake list. The 4Ms are coming in couplets. Two at time within an hour or so. Pop pop. Like the popcorn maker. I don't really think it means anything but it's something to notice.

www.youtube.com...

reply to post by ericblair4891


Friday the 13th coming up.

Good for some doom perhaps? Still awaiting Spacejockey1's mag 7. I assume he was talking UTC so 21.5 hours to go then.

Originally posted by ericblair4891
Okay, so I still say we're in the lull. There's been that 5.8M. And then there were some 4's. So, I was hoping things would resume as usual and there would be nothing to observe except the seemingly randomness of it all. But there is something that I'm noticing in today's quake list. The 4Ms are coming in couplets. Two at time within an hour or so. Pop pop. Like the popcorn maker. I don't really think it means anything but it's something to notice.

www.youtube.com...

I notice that too. Small swarms on the ridges especially.

Can't say I'm surprised that I'm to awake to no 5s again.

Originally posted by PuterMan
reply to post by ericblair4891

 

Friday the 13th coming up.

Good for some doom perhaps? Still awaiting Spacejockey1's mag 7. I assume he was talking UTC so 21.5 hours to go then.

Yes, UTC...Counting down the hours! lol

Would be typical if the God's (moon & planets) would let me down on this one though.

Looks like there was a 3.5 on the 9th, in the spot of the 7.2 M 1929 Grand Banks EQ.


2012/04/09 - 00:12:00
44.63N 55.67W
Depth: 18.0*
Mag: 3.5 ML Felt: No
275 km S from Grand Banks, Newfoundland

1929 Grand Banks Earthquake:

Local Date and Time: November 18, 1929 at 5:02 pm Newfoundland time
UT Date and Time: 1929-11-18 20:32 UT
Magnitude: MW 7.2; MS 7.2; mB 7.1
Maximum Intensity: (Rossi Forel) VI
44.69° N 6.00° W
Depth: 20.0*


Ok, it appears they do occur, just not that often.

The earthquake triggered a large submarine slump (an estimated volume of 200 cubic kilometres of material was moved on the Laurentian slope) which ruptured 12 transatlantic cables in multiple places (locations of cable breaks can be seen as small red triangles on the isoseismal map) and generated a tsunami (a large induced sea wave). The tsunami was recorded along the eastern seaboard as far south as South Carolina and across the Atlantic Ocean in Portugal.

This site has lots of sources and photos of the event. I just hope all these years isn't leading up to another. I find it interesting how quakes in the Atlantic and up north come to occur.

www.earthquakescanada.nrcan.gc.ca...

HIGH LEVEL TSUNAMI WARNING IN EFFECT FOR INDIAN OCEAN SHORES
ptwc.weather.gov...

Google Map of Epicenter
g.co...

earthquake.usgs.gov...

Magnitude 8.7

Date-Time

Wednesday, April 11, 2012 at 08:38:38 UTC
Wednesday, April 11, 2012 at 02:38:38 PM at epicenter

Location 2.348°N, 93.073°E
Depth 33 km (20.5 miles)
Region OFF THE WEST COAST OF NORTHERN SUMATRA
Distances

431 km (268 miles) SW (216°) from Banda Aceh, Sumatra, Indonesia
962 km (598 miles) W (265°) from KUALA LUMPUR, Malaysia

reply to post by BeyondPerception


No we know why it was quiet!

Magnitude 8.9 off the west coast of northern Sumatra

Location in Google Maps

• Date-Time: Wednesday, April 11, 2012 at 08:38:30 UTC
  Wednesday, April 11, 2012 at 02:38:30 PM at epicenter
  
• Location: 2.043°N, 92.518°E
  
• Depth: 33 km (20.5 miles) set by location program
  
• Region: OFF THE WEST COAST OF NORTHERN SUMATRA
  
• Distances:
  495 km [308 miles] SW [219°] from Banda Aceh, Sumatra, Indonesia
  1027 km [638 miles] W [263°] from KUALA LUMPUR, Malaysia
  
  
• Location Uncertainty: Error estimate not available
  
• Parameters: NST= 14, Nph=0, Dmin=0 km, Rmss=0 sec, Gp=198°,M-type="moment" magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=B
  
• Source:  NOAA Pacific Tsunami Warning Center
  
• Event ID:  pt12102000
  

Derived from Data Source: USGS
Powered by QVSData

Tsunami Alert

000
WEIO21 PHEB 110845
TSUIOX

TSUNAMI BULLETIN NUMBER 001
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 0845Z 11 APR 2012

THIS BULLETIN IS FOR ALL AREAS OF THE INDIAN OCEAN.

... AN INDIAN-OCEAN-WIDE TSUNAMI WATCH IS IN EFFECT ...

A TSUNAMI WATCH IS IN EFFECT FOR

INDONESIA / INDIA / SRI LANKA / AUSTRALIA / MYANMAR / THAILAND /
MALDIVES / UNITED KINGDOM / MALAYSIA / MAURITIUS / REUNION /
SEYCHELLES / PAKISTAN / SOMALIA / OMAN / MADAGASCAR / IRAN /
UAE / YEMEN / COMORES / BANGLADESH / TANZANIA / MOZAMBIQUE /
KENYA / CROZET ISLANDS / KERGUELEN ISLANDS / SOUTH AFRICA /
SINGAPORE

THIS BULLETIN IS ISSUED AS ADVICE TO GOVERNMENT AGENCIES. ONLY
NATIONAL AND LOCAL GOVERNMENT AGENCIES HAVE THE AUTHORITY TO MAKE
DECISIONS REGARDING THE OFFICIAL STATE OF ALERT IN THEIR AREA AND
ANY ACTIONS TO BE TAKEN IN RESPONSE.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 0839Z 11 APR 2012
COORDINATES - 2.0 NORTH 92.5 EAST
LOCATION - OFF W COAST OF NORTHERN SUMATRA
MAGNITUDE - 8.7

EVALUATION

EARTHQUAKES OF THIS SIZE HAVE THE POTENTIAL TO GENERATE A
WIDESPREAD DESTRUCTIVE TSUNAMI THAT CAN AFFECT COASTLINES ACROSS
THE ENTIRE INDIAN OCEAN BASIN.

HOWEVER - IT IS NOT KNOWN THAT A TSUNAMI WAS GENERATED. THIS
WATCH IS BASED ONLY ON THE EARTHQUAKE EVALUATION. AUTHORITIES IN
THE REGION SHOULD TAKE APPROPRIATE ACTION IN RESPONSE TO THE
POSSIBILITY OF A WIDESPREAD DESTRUCTIVE TSUNAMI.

ESTIMATED INITIAL TSUNAMI WAVE ARRIVAL TIMES AT FORECAST POINTS
WITHIN THE WARNING AND WATCH AREAS ARE GIVEN BELOW. ACTUAL
ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
SUCCESSIVE WAVES CAN BE FIVE MINUTES TO ONE HOUR.

LOCATION FORECAST POINT COORDINATES ARRIVAL TIME
-------------------------------- ------------ ------------
INDONESIA SIMEULUE 2.5N 96.0E 0921Z 11 APR
BANDA_ACEH 5.5N 95.1E 0931Z 11 APR
SIBERUT 1.5S 98.7E 0941Z 11 APR
PADANG 0.9S 100.1E 1017Z 11 APR
BENGKULU 3.9S 102.0E 1038Z 11 APR
CILACAP 7.8S 108.9E 1205Z 11 APR
BANDAR_LAMPUNG 5.7S 105.3E 1213Z 11 APR
BALI 8.7S 115.3E 1253Z 11 APR
KUPANG 10.0S 123.4E 1338Z 11 APR
BELAWAN 3.8N 98.8E 1348Z 11 APR
BALI 8.7S 115.3E 1253Z 11 APR
INDIA GREAT_NICOBAR 7.1N 93.6E 0937Z 11 APR
LITTLE_ANDAMAN 10.7N 92.3E 1016Z 11 APR
PORT_BLAIR 11.9N 92.7E 1032Z 11 APR
NORTH_ANDAMAN 13.3N 92.6E 1052Z 11 APR
CHENNAI 13.4N 80.4E 1127Z 11 APR
KAKINADA 17.2N 82.7E 1205Z 11 APR
TRIVANDRUM 8.3N 76.9E 1208Z 11 APR
MANGALORE 13.3N 74.4E 1336Z 11 APR
BOMBAY 18.8N 72.6E 1608Z 11 APR
GULF_OF_KUTCH 22.7N 68.9E 1634Z 11 APR
SRI LANKA DONDRA_HEAD 5.9N 80.6E 1039Z 11 APR
TRINCOMALEE 8.7N 81.3E 1051Z 11 APR
COLOMBO 6.9N 79.8E 1120Z 11 APR
JAFFNA 9.9N 80.0E 1231Z 11 APR
AUSTRALIA COCOS_ISLAND 12.1S 96.7E 1045Z 11 APR
NORTH_WEST_CAPE 21.5S 113.9E 1314Z 11 APR
CAPE_INSPIRATIO 25.9S 113.0E 1413Z 11 APR
PERTH 32.0S 115.3E 1420Z 11 APR
AUGUSTA 34.3S 114.7E 1440Z 11 APR
GERALDTOWN 28.6S 114.3E 1459Z 11 APR
CAPE_LEVEQUE 16.1S 122.6E 1506Z 11 APR
ESPERANCE 34.0S 121.8E 1615Z 11 APR
KINGSTON_SOUTH_ 37.0S 139.4E 1748Z 11 APR
HEARD_ISLAND 54.0S 73.5E 1802Z 11 APR
EUCLA_MOTEL 31.8S 128.9E 1836Z 11 APR
HOBART 43.3S 147.6E 1901Z 11 APR
DARWIN 12.1S 130.7E 1935Z 11 APR
MYANMAR CHEDUBA_ISLAND 18.9N 93.4E 1149Z 11 APR
CHEDUBA_ISLAND 18.9N 93.4E 1149Z 11 APR
PYINKAYAING 15.9N 94.3E 1150Z 11 APR
SITTWE 20.0N 92.9E 1226Z 11 APR
MERGUI 12.8N 98.4E 1316Z 11 APR
YANGON 16.5N 96.4E 1507Z 11 APR
THAILAND PHUKET 8.0N 98.2E 1118Z 11 APR
KO_PHRA_THONG 9.1N 98.2E 1223Z 11 APR
KO_TARUTAO 6.6N 99.6E 1256Z 11 APR
MALDIVES GAN 0.6S 73.2E 1137Z 11 APR
MINICOV 8.3N 73.0E 1210Z 11 APR
MALE 4.2N 73.6E 1211Z 11 APR
UNITED KINGDOM DIEGO_GARCIA 7.3S 72.4E 1153Z 11 APR
MALAYSIA GEORGETOWN 5.4N 100.1E 1311Z 11 APR
PORT_DICKSON 2.5N 101.7E 1810Z 11 APR
MAURITIUS PORT_LOUIS 20.0S 57.3E 1455Z 11 APR
REUNION ST_DENIS 20.8S 55.2E 1512Z 11 APR
SEYCHELLES VICTORIA 4.5S 55.6E 1516Z 11 APR
PAKISTAN GWADAR 25.1N 62.4E 1536Z 11 APR
KARACHI 24.7N 66.9E 1644Z 11 APR
SOMALIA CAPE_GUARO 11.9N 51.4E 1539Z 11 APR
HILALAYA 6.4N 49.1E 1540Z 11 APR
MOGADISHU 2.0N 45.5E 1558Z 11 APR
KAAMBOONI 1.5S 41.9E 1623Z 11 APR
OMAN MUSCAT 23.9N 58.6E 1540Z 11 APR
SALALAH 16.9N 54.1E 1547Z 11 APR
DUQM 19.7N 57.8E 1556Z 11 APR
MADAGASCAR ANTSIRANANA 12.1S 49.5E 1544Z 11 APR
TOAMASINA 17.8S 49.6E 1551Z 11 APR
MANAKARA 22.2S 48.2E 1610Z 11 APR
MAHAJANGA 15.4S 46.2E 1653Z 11 APR
CAP_STE_MARIE 25.8S 45.2E 1713Z 11 APR
TOLIARA 23.4S 43.6E 1733Z 11 APR
IRAN GAVATER 25.0N 61.3E 1546Z 11 APR
UAE FUJAIRAH 25.1N 56.4E 1621Z 11 APR
YEMEN AL_MUKALLA 14.5N 49.2E 1626Z 11 APR
ADEN 13.0N 45.2E 1726Z 11 APR
COMORES MORONI 11.6S 43.3E 1644Z 11 APR
BANGLADESH CHITTAGONG 22.7N 91.2E 1651Z 11 APR
TANZANIA LINDI 9.8S 39.9E 1659Z 11 APR
DAR_ES_SALAAM 6.7S 39.4E 1732Z 11 APR
MOZAMBIQUE CABO_DELGADO 10.7S 40.7E 1701Z 11 APR
ANGOCHE 15.5S 40.6E 1720Z 11 APR
QUELIMANE 18.0S 37.1E 1841Z 11 APR
MAPUTO 25.9S 32.8E 1959Z 11 APR
BEIRA 19.9S 35.1E 2016Z 11 APR
KENYA MOMBASA 4.0S 39.7E 1706Z 11 APR
CROZET ISLANDS CROZET_ISLANDS 46.4S 51.8E 1733Z 11 APR
KERGUELEN ISLAN PORT_AUX_FRANCA 49.0S 69.1E 1815Z 11 APR
SOUTH AFRICA PRINCE_EDWARD_I 46.6S 37.6E 1907Z 11 APR
DURBAN 29.8S 31.2E 1910Z 11 APR
PORT_ELIZABETH 33.9S 25.8E 2006Z 11 APR
CAPE_TOWN 34.1S 18.0E 2109Z 11 APR
SINGAPORE SINGAPORE 1.2N 103.8E 2351Z 11 APR

ADDITIONAL BULLETINS WILL BE ISSUED BY THE PACIFIC TSUNAMI
WARNING CENTER FOR THIS EVENT AS MORE INFORMATION
BECOMES AVAILABLE.

THE JAPAN METEOROLOGICAL AGENCY MAY ISSUE ADDITIONAL INFORMATION
FOR THIS EVENT. IN THE CASE OF CONFLICTING INFORMATION...THE
MORE CONSERVATIVE INFORMATION SHOULD BE USED FOR SAFETY.

reply to post by SpaceJockey1


Well you were right and you were wrong. Way above your estimate.

Spot on my man for the timing!

Indonesia issues tsunami warning after 8.9 magnitude quake strikes off west coast
Washington Post

Although they report 8.9 preliminary, USGS reports 8.7 (adjusted)
(not that it makes it any less )

Link to Google News page which pulls up real-time articles on this...
is.gd...

Originally posted by PuterMan
reply to post by SpaceJockey1

 

Well you were right and you were wrong. Way above your estimate.

Spot on my man for the timing!

Well it's one of those times you really wish you weren't right about something like this

Though I predicted a 7+ for the time period, I certainly didn't conceive that an 8+ was in the offing!

Let's hope that there's no big tsunami with that one...

Does anyone else feel like the earth is singing "I'm going through chaaaanges" (Black Sabbath)

Originally posted by dreamfox1
Is it me or does it look like the area from the Gulf of Mexico all the way down to Panama is having some sort of stress build up?

earthquake.usgs.gov...

A line of quakes of 4+ size

More activity showing up on the US west cost after that release off the west coast of northern Sumatra. Stay Safe Everyone !!!


quakes.globalincidentmap.com...

Using these 3 quakes


Type: Earthquake
3 hours ago
Magnitude: 5.1
DateTime: Wednesday April 11 2012, 05:44:41 UTC
Region: southern Mid-Atlantic Ridge
Depth: 10.5 km
Source: USGS Feed

Type: Earthquake
53 minutes ago
Magnitude: 8.7
DateTime: Wednesday April 11 2012, 08:38:38 UTC
Region: off the west coast of northern Sumatra
Depth: 33 km
Source: USGS Feed

Type: Earthquake
36 minutes ago
Magnitude: 1.4
DateTime: Wednesday April 11 2012, 08:55:34 UTC
Region: Southern California
Depth: 14.9 km
Source: USGS Feed

Bad enough it makes a straight line from that 8.7 to the coastline of California were Los Angeles is

I hope im wrong

how is it two huge earthquakes happen in sumatra within 10 years and nothing on the west coast?
big pressure buildup?

Originally posted by yourmaker
how is it two huge earthquakes happen in sumatra within 10 years and nothing on the west coast?
big pressure buildup?

Answer is YES !!!!!!!!!!!

And im out for the night .....Night everyone and stay safe

M8.2 - Off The West Coast Of Northern Sumatra 2012-04-11 10:43:09 UTC Event Time 2012-04-11 10:43:09 UTC 2012-04-11 16:43:09 UTC+06:00 at epicenter 2012-04-11 05:43:09 UTC-05:00 system time Nearby Cities 476km (295mi) WSW from Sinabang, Indonesia 552km (342mi) SW from Meulaboh, Indonesia 617km (383mi) SSW from Banda Aceh, Indonesia 641km (398mi) SW from Sigli, Indonesia 1060km (658mi) WSW from Kuala Lumpur, Malaysia

USGS.gov

Seems like a big aftershock just rolled through. I am sure this is normal, but jeesh two >8 back to back would be enough to make me a little anxious. Prayers for the people in the area.

reply to post by Doodle19815

Yes, a major aftershock (assuming that it's close enough and within the same fault system as it seems to be) -- and really a bit bigger than we'd typically expect.

Makes me wonder if the primary quake might get revised back upwards.

I know you've posted some data, but here's the USGS data page as well that includes coordinates etc:

Magnitude 8.2 - OFF THE WEST COAST OF NORTHERN SUMATRA
2012 April 11 10:43:09 UTC

Details
Maps
Tsunami

Earthquake Details

This event has been reviewed by a seismologist.

Magnitude 8.2
Date-Time

Wednesday, April 11, 2012 at 10:43:09 UTC
Wednesday, April 11, 2012 at 04:43:09 PM at epicenter

Location 0.773°N, 92.452°E
Depth 16.4 km (10.2 miles)
Region OFF THE WEST COAST OF NORTHERN SUMATRA
Distances

615 km (382 miles) SSW (211°) from Banda Aceh, Sumatra, Indonesia
1061 km (659 miles) WSW (256°) from KUALA LUMPUR, Malaysia

Location Uncertainty horizontal +/- 14.2 km (8.8 miles); depth +/- 6.4 km (4.0 miles)
Parameters NST= 99, Nph=101, Dmin=573.3 km, Rmss=0.95 sec, Gp= 40°,
M-type=regional moment magnitude (Mw), Version=7
Source

Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)

Event ID usc00090da

Source USGS data page here

Mike

Thanks Mike for posting the extra info. I can't imagine what this must feel like to them. Do you know if the tsunami ever came to anything. I am looking for the pager alerts and am sad to say that USGS.gov is not my friend when it comes to finding info. I really need to make myself more familiar with that site.

USGS map showing the mag 8.6 in blue (current USGS number) and the mag 8.2 aftershock (?) in red.



Source: USGS map

Mike