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04-16-2014, 06:37 AM
Just stumbled across something...
Oct 28 1983, the M7.3 Borah Peak earthquake struck about 40 miles south south-east of where these current quakes are occurring near Challis, Idaho. I vaguely recall this event as I had family in Boise.
The fault scarp is still visible to this day, and is clearly seen in Google Earth.
Borah Peak itself looks awesome from a geology perspective - lots of layers exposed.
http://en.wikipedia.org/wiki/Borah_Peak
http://en.wikipedia.org/wiki/1983_Borah_Peak_earthquake
And, in case you don't have it yet, the following link is to KML files on the USGS site for quaternary faults for use in Google Earth. Quite handy.
http://earthquake.usgs.gov/hazards/qfaults/google.php
Anyway, the current sequence is consistent with being on the north end of the same fault structure responsible for the 1983 quake, including the beach ball orientation.
Brian
Oct 28 1983, the M7.3 Borah Peak earthquake struck about 40 miles south south-east of where these current quakes are occurring near Challis, Idaho. I vaguely recall this event as I had family in Boise.
The fault scarp is still visible to this day, and is clearly seen in Google Earth.
Borah Peak itself looks awesome from a geology perspective - lots of layers exposed.
http://en.wikipedia.org/wiki/Borah_Peak
http://en.wikipedia.org/wiki/1983_Borah_Peak_earthquake
And, in case you don't have it yet, the following link is to KML files on the USGS site for quaternary faults for use in Google Earth. Quite handy.
http://earthquake.usgs.gov/hazards/qfaults/google.php
Anyway, the current sequence is consistent with being on the north end of the same fault structure responsible for the 1983 quake, including the beach ball orientation.
Brian