Substantial (6+ on the Richter scale) seismic event in Eastern Russia

[GoddessOfGuinness]

http://earthquake.usgs.gov/eqcenter/recenteqsww/Maps/10/135_45.php
But there aren't any details coming up...

[Tandalayo_Scheisskopf]

1. Huge Russian Naval Base...

At Vladivostok.

[GoddessOfGuinness]

2. Kind of makes you wonder...

:scared:

[originalpckelly]

6. Yes, it makes me wonder.

God I hope something awful hasn't happened. I'm going to turn on CNN now.

[all.of.me]

3. there was one nearby in japan, too.

http://www.iris.edu/seismon/

wow.

[GoddessOfGuinness]

10. The Russian event was pretty deep...436.2

[originalpckelly]

14. Just to give a frame of reference: the quake was so deep...

if the depth had instead been reversed, it would have gone into space with 229 miles to spare.

[originalpckelly]

4. Just what the fuck? Why aren't the details coming up?

That's never happened to me ever before when I've used that site! :wow:

:scared:

[originalpckelly]

5. Looks like it happened an hour and 45 minutes ago.

:scared:

[Xithras]

7. Is that depth right?

The site is displaying a 6.2 quake at a depth of 436 miles. I've never seen a quake that deep.

If that is accurate, it's likely that the people there hardly felt it. Even on the epicenter you'd be 436 miles from the point of the slip...far enough to mute just about all of the shockwaves.

[originalpckelly]

9. I know, something is amiss with this.

I do not like this report. I've never seen something like it. Could it be some type of volcanic eruption?

[GoddessOfGuinness]

13. That's what I'm wondering...

If it was a military mishap, surely the depth would not be that great.

[deadcenter]

15. no, 436 miles

would be well below the brittle/ductile transition zone, don't think anything that deep would produce an observable earthquake as we (geologists/seismologist/rockheads) tend to think of earthquakes. Best guess, the observations are so recent that folks haven't had time to do any analysis or correction to the data that's coming in.

[originalpckelly]

16. Yeah, but you'd think they review a 6 pointer within an hour or less...

they haven't.

[GoddessOfGuinness]

18. 432 km (268.43 miles)

according to this site: http://hisz.rsoe.hu/alertmap/seism_read.php?rid=44003&lang=eng
Still pretty amazing.

[deadcenter]

23. here's what I got

from a contact at USGS when I asked about deep quakes relative to the brittle/ductile transition at about 15 km depth;

Your recollection of the location of the brittle-ductile transition is correct. However, in subduction zones the colder, more brittle crust is plunging into the hotter, more ductile mantle. Earthquakes can occur both at the subduction zone interface, as well as within the subducted crust down to depths of approximately 670 km (416 mi).

You are also correct that our preliminary estimates of earthquake location and magnitude get more accurate as more data comes in and is analyzed. However, given the large amount of real-time data that we now receive, even the preliminary estimates are very accurate these days.

USGS seismologist

Interesting stuff, but I would guess it's not that unusual considering it is in a subduction zone.

[rasputin1952]

8. Mines not coming up either after I enter the site, must be alot of traffic...

any reports on possible sesmic waves coming across the Sea of Japan or the Pacific?

looks like S of japan they had a goody too...:(

[originalpckelly]

11. It was in a mountain range:

http://maps.google.com/maps?f=q&hl=en&q=+43.218%09+133.546&layer=&ie=UTF8&z=12&ll=43.218187,133.545685&spn=0.112589,0.346069&t=h&om=1

[silverlib]

12. This is the best site I have found...

http://hisz.rsoe.hu/alertmap/woalert.php?lang=eng

[GoddessOfGuinness]

17. They say it was a 5.9...

Interesting.

Thanks for the link! :yourock:

[GoddessOfGuinness]

19. USGS Finally has info up...Says it was 6.2...

I wonder if they were waiting due to the unusual depth...

[bananas]

20. There is a quake about a minute earlier, maybe it threw off the depth calculations

Depth of 30 is a default depth when there isn't enough data.

http://www.seismo.ethz.ch/redpuma/redpuma_ami_list.html

D a t e Time (UTC) Location Dep Magni. T AGY R e g i o n

09Mar2007 03:21:50.1 41.5N 134.8E 30 mb=6.6 A*ODC SEA OF JAPAN 0505
09Mar2007 03:22:39.1 43.2N 133.5E415 Mw=6.2 M*EMS NEAR SOUTHEAST COAST OF RU0427
09Mar2007 03:22:41.0 43.3N 133.6E440 mb=6.3 M*GSR NEAR SOUTHEAST COAST OF RU0421
09Mar2007 03:22:38.8 43.2N 133.5E412 mb=6.5 M*EMS NEAR SOUTHEAST COAST OF RU0419
09Mar2007 03:21:43.0 40.7N 135.9E 30 mb=6.8 M*ROM SEA OF JAPAN 0411
09Mar2007 03:22:42.5 43.2N 133.5E436 M =6.2 M*NEI NEAR SOUTHEAST COAST OF RU0405

[nofurylike]

21. does that depth imply subduction occurring?

Residents of Primorye sleep through earthquake
VLADIVOSTOK, March 9 (RIA Novosti)

http://en.rian.ru/russia/20070309/61748952.html

-snip-
The geophysical service at the Russian Academy of Sciences said the epicenter was about 440 kilometers below the surface, and that as a result it was barely noticeable to local inhabitants.

***

[GoddessOfGuinness]

22. Amazing...

I wonder what implications such a huge event has for areas closer to the surface; and if there are volcanoes nearby that might be affected.

[nofurylike]

24. it is true that deep subductions can cause volcanoes

to form, or existing ones to erupt.

and it really is Amazing! O! Mother Earth!


peace