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Re: Quake and shake on eastern seaboard



The quake was felt here in Pittsburgh, but no damage to specimens at the 
Carnegie.  The mounts shook a little, but that's it.

--Mike Habib


On Aug 23, 2011, at 2:38 PM, Scott Hartman wrote:

> I hope everyone (and the many important collections) on the East Coast
> escaped injury.  I just spoke to some people in downtown Milwaukee who
> felt it (and where unaware of the eastern seaboard quake until I told
> them).  Presumably such a large range of people feeling the quake
> results from it being such a shallow one?
> 
> -Scott
> 
> On Tue, Aug 23, 2011 at 1:24 PM,  <GSP1954@aol.com> wrote:
>> Was working on my computer just before 2 PM when there was what seemed to
>> be a strong north-south movement. My 3rd floor abode can bounce to passing
>> traffic but this was far more intense. After a few seconds it stopped
>> (longitudinal P waves me thinks), to be followed by an even stronger more 
>> vertical
>> motion (shaking S waves I presume). Is a near surface 5.8 out of northern
>> Virginia that was felt as far as NYC. Because the ground is harder on the 
>> east
>> coast quake motions are transmitted much further than on the softer ground
>> west coast. It is possible that these are Pleistocene quakes resulting from
>> crustal adjustments in response to the current lack of glacial mass to the
>> north. If a really big one hits we are toast due to lack of earthquake codes.
>> 
>> Is the first quake I have ever actually felt. Reminds me of earlier this
>> summer when at Jim Farlow's Pipe Creek screening we watched and felt 16 
>> tonnes
>> of Amfo (same fertilizer-kerosene mix used by McVey) to blast off 50,000
>> tonnes (weight of an Iowa class battleship) of a limestone quarry wall from
>> almost half a mile away, producing immediate stong vertical shaking followed
>> two or three seconds later by modest rumbling roar.
>> 
>> Of course this is trivia to west coasters.
>> 
>> GSPaul </HTML>
>> 
> 
> 
> 
> -- 
> Scott Hartman
> Scientific Advisor/Technical Illustrator
> (307) 921-9750
> website: www.skeletaldrawing.com
> blog: http://skeletaldrawing.blogspot.com/

Michael Habib
Assistant Professor of Biology
Chatham University
Woodland Road, Pittsburgh PA  15232
Buhl Hall, Room 226A
mhabib@chatham.edu
(443) 280-0181