A number of short news media stories about this latest EQ off Vancouver Island have been triggered before it was downgraded to 5.8
The CNN article had a USGS person quoted as saying the number of earthquakes there (24 of 4+) in such a short period of time is not that unusual...
----- Original Message ----
From: Steve Davidson <azlea
...@yahoo.com>
To: Pinpoint-Newsletter@googlegroups.com
Sent: Thursday, August 28, 2008 7:53:15 AM
Subject: Pinpoint-News-- More Vancouver Island 4+ EQs
http://earthquake.usgs.gov/eqcenter/recenteqsww/Maps/10/230_50_eqs.php
I see that the latest count of Vancouver Island quakes above 4.0 is now up to 24 in the last day... One a few minutes ago was listed at 6.1, but I see now that it was downgraded to 5.8
Definitely something unusual happening up there and it is a changing status hourly.
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Learning to see life more clearly, one image at a time...
Steve Davidson
----- Original Message ----
From: Canie <ca...@basicso.com>
To: Pinpoint-Newsletter@googlegroups.com
Sent: Wednesday, August 27, 2008 4:13:24 PM
Subject: Pinpoint-News-- Re: Off Vancouver Island SIX 4M quakes in one day.
Those quakes are rather scattered over a wide area - I think the 10km is
not accurate - just a default for a shallow quake - I would guess that
are are poorly located and we'll have to wait for better human review and
corrected locations/depths..
But something odd is going on !
Canie
At 03:46 PM 8/27/2008, you wrote:
Take a look at the Google Earth map of the 5.2 quake. All of today's quakes are shown, and
their distribution is easier to see. These are most likely spreading
ridge quakes, possibly stress release at the ridge area. Three seem to be
at the head of an undersea canyon. Anything stronger might start a
rockfall or mud avalanche. These quakes are about 60-65 km west of the
deformation front that defines the subduction zone. They aren't
subduction quakes, but that doesn't mean they can't trigger
something.