7.4 EQ in Fox & Aleutian Islands area of AK - Tsunami warning in effect

[Catbird]

http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/usc0004f5m.php#details

http://wcatwc.arh.noaa.gov/2011/06/24/ln9y44/01/messageln9y44-01.htm

The tsunami warning message specifies: "coastal areas of Alaska from Amchitka Pass, Alaska (125 miles W of Adak) to Attu, Alaska. This message is for Information Only for coastal areas of California, Oregon, Washington, British Columbia and Alaska from the California-Mexico border to Unimak Pass, Alaska (80 miles NE of Dutch Harbor)."

[Catbird]

According to Reuter's reports (http://www.reuters.com/article/2011/06/24/quake-alaska-idUSN1E75M25620110624), there were actually 2 separate earthquakes of approximately the same magnitude in almost the same place.

The article also lists a projected time for any possible tsunami wave to hit the AK coast: "...If a tsunami has been generated, the waves will first reach Adak, Alaska, at 8:12 p.m. Adak, Alaskam time (0412 GMT on Friday)".

[Ought Six]

http://edition.cnn.com/2011/US/06/24/alaska.earthquake/

Tsunami warning canceled.

[Samen]

First NZ then Japan now Aleutian next LA


http://pubs.usgs.gov/gip/dynamic/graphics/Fig22.gif


Image: http://pubs.usgs.gov/gip/dynamic/fire.html

[Sysiphus]

First NZ then Japan now Aleutian next LA

Add to that the big Chilean one a while back.

[Ought Six]

First NZ then Japan now Aleutian next LA


http://pubs.usgs.gov/gip/dynamic/graphics/Fig22.gif


Image: http://pubs.usgs.gov/gip/dynamic/fire.html.... or the Cascadia Subduction Zone.

http://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Cascadia_subduction_zone_USGS.png/420px-Cascadia_subduction_zone_USGS.png

[Catbird]

I almost didn't start this thread last night because it seems that EQ's are becoming almost a daily or weekly occurrence. But 7.4, the initial estimate, is getting up there. And when I saw where it was - right in the middle of the Aleutian Trench - I thought, "Hmmm, this could turn into something".

Fortunately, it didn't. But I really am coming to believe that there is something weird going on, seismically speaking.

[CanadaSue]

I'm hoping these fairly frequent, fairly large quakes are taking significsnt pressure off plates & major fault lines. Conversely, they could be adding pressure.

[rb.]

Bingo.