7.5 Magnitude Earthquake Off Alaskan ...

7.5 Magnitude Earthquake Off Alaskan Coast Prompts Tsunami Warning

There are 1 comment on the Inhabitat story from Jan 7, 2013, titled 7.5 Magnitude Earthquake Off Alaskan Coast Prompts Tsunami Warning. In it, Inhabitat reports that:

A powerful earthquake 60 miles west of Craig shook the Alaskan coast at midnight Friday.

Join the discussion below, or Read more at Inhabitat.

“Geologist [I'm Climate Change]”

Since: Mar 07

formerly Nuneaton

#1 Jan 9, 2013
Nice big surf pic. That one had nowt to do with a tsunami.

The NEIC website gave this as a transform with light compression in the descending plate on the outer trench. The area of the quake & along strike appears to be an established slow crawl transform fault zone outside of the alaska & BC island chain comprising the forearc.

This one appears to be the results of crustal decompression from the 1964 Alaska rebound/long duration mercalli X quake (r/lx) which decompressed the Pacific plate allowing transform faulting as the prime mover rather than thrust faulting in the Craig area. The prior quake (pre Xmas) further south in Haider Gwaii, appears to be outside of the decompressed pacific plate zone and was predominantly a thrust with minor transform component quake.

Apparently the tsunami was rather small, the Haider Gwaii example was rather bigger.

Have a nice day.

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