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Thursday, September 22, 2011 at 20:22:06 UTC
Thursday, September 22, 2011 at 01:22:06 PM at epicenter
Time of Earthquake in other Time Zones
24.5 km (15.2 miles) set by location program
SEATTLE-TACOMA URBAN AREA, WASHINGTON
1 km (0 miles) NE (55°) from Maple Heights-Lake Desire, WA
4 km (3 miles) SE (141°) from East Renton Highlands, WA
6 km (4 miles) WSW (250°) from Mirrormont, WA
17 km (11 miles) SSE (160°) from Bellevue, WA
27 km (17 miles) SE (136°) from Seattle, WA
Error estimate not available
NST= 59, Nph= 59, Dmin=12 km, Rmss=0.26 sec, Gp= 22°,
M-type=duration magnitude (Md), Version=2
Pacific Northwest Seismograph Network
The Nisqually earthquake that rocked the Northwest eight years ago was a 6.8 magnitude.
The quake, centered deep in the Earth, caused a lot of shaking and some damage.
But the ground didn't rise up like it did 1,000 years ago. That's when scientists believe a 7- to 7.5-magnitude earthquake hit the more shallow Seattle fault zone that runs from Sammamish, through Seattle and out toward Bremerton.
Scientists believe some areas rose 18 feet during the quake, that the southwest tip of Bainbridge Island rose out of the Puget Sound, and so did much of Alki Point in West Seattle, which is now full of homes.
The quake also generated a tsunami - a wave possibly six feet high - when it hit Elliott Bay in Shoreline.
And now Martin says she's gathered evidence that the Seattle fault zone could be much bigger than we think, and a quake could spread damage much further west
June 4, 2004 - TWO NEW DEVELOPMENTS: 1. The deep tremor in the Pacific Northwest seems to have died out completely. 2. We have found deep tremor in northern California. After the southwestern Washington deep tremor became weak and seemed to move into northwestern Oregon it became even weaker and died out with the last period of obvious tremor being on the night of May 27. Nothing recognizable as deep tremor has been seen since then. However, with prompting from Seth Moran of the Cascade Volcano Observatory and the help of David Oppenheimer of the Northern California Seismic Network we started examining data from northern California and see deep tremor there. Starting weakly on about May 23 with very strong bursts from time to time from May 25-29 we are still seeing small to medium size bursts from time to time today. Some of the stronger bursts could be located and are shown on a map of northern California. The colors are for events on different days (May 25,26-red, 27-yellow, 28-green, 29-blue). There is no reasonable depth control for these events yet.
So, if they were already observing ETS in Nthn California seven years ago, surely this just adds more weight to the hypothesis that the subduction "line" could extend much further south than currently surmised? Westcoast holds that opinion and I humbly agree, but here's the main point: shouldn't they be doing similar array studies even further south into Cal to see if there is similar ETS? I mean, much further south?