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Re: Seismic Event

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Harold, is there any information on ground PGA yet? The USGS intensity
map shows intensity of up to MM-VI, is it true?

On 8/24/11, Harold Sprague <spraguehope(--nospam--at)hotmail.com> wrote:
>
> This will be interesting on an academic level because of the transmission of
> high frequency ground motions versus low frequency ground motions and the
> in-structure response.  The 20th floor of a building should not transmit a
> significant high frequency ground motion, but would transmit low frequency
> ground motions.
>
> The underlying rock of the East Coast is not highly fractured as the classic
> slip faults in California.  The ground motions (especially low frequency) do
> not attenuate quickly in unfractured rock.  This is the 20th earthquake of
> Modified Mercalli V or higher in Virginia since 1774.  There was a Modified
> Mercalli VIII in 1897 in Virginia.
>
> My son serves on an aircraft carrier, but is living on shore now in Norfolk,
> VA.  He felt it, but was not too alarmed.
>
> ...The aircraft carrier sustained no damage;>)
>
> Regards, Harold Sprague
>
>
>> From: ahcene.djebli(--nospam--at)shawgrp.com
>> To: seaint(--nospam--at)seaint.org
>> Subject: RE: Seismic Event
>> Date: Tue, 23 Aug 2011 19:05:03 +0000
>>
>> We felt in Charlotte NC, I was in 2oth floor of a building in uptown
>> (Downtown) Charlotte Nc.
>>
>> -----Original Message-----
>> From: Bill Polhemus [mailto:bill(--nospam--at)polhemus.cc]
>> Sent: Tuesday, August 23, 2011 2:26 PM
>> To: <seaint(--nospam--at)seaint.org>
>> Subject: Re: Seismic Event
>>
>> Did NOT feel it in N. Central New Jersey.
>>
>> William L. Polhemus, Jr. P.E.
>> Via iPhone 4
>>
>> On Aug 23, 2011, at 2:18 PM, "Kavsak, Paul M." <KavsakPM(--nospam--at)westinghouse.com>
>> wrote:
>>
>> > Did not feel it in Pittsburgh, must have taken an end around.
>> >
>> > -----Original Message-----
>> > From: Alexander Bausk [mailto:bauskas(--nospam--at)gmail.com]
>> > Sent: Tuesday, August 23, 2011 2:17 PM
>> > To: seaint(--nospam--at)seaint.org
>> > Subject: Re: Seismic Event
>> >
>> > Chicago folks report in Twitter that it was felt there too
>> >
>> > On 8/23/11, Joseph R. Grill <vveng(--nospam--at)cableone.net> wrote:
>> >> Virginia Beach, VA also
>> >>
>> >> Sent from my iPhone
>> >> Joseph Grill
>> >>
>> >> On Aug 23, 2011, at 1:57 PM, "Stuart, Matthew" <MStuart(--nospam--at)Pennoni.com>
>> >> wrote:
>> >>
>> >>> I know you west coast guys will laugh, but ground shaking on the east
>> >>> coast is pretty rare. Anyway we just had seismic event that was felt
>> >>> from
>> >>> at least Philadelphia to Newark, NJ
>> >>>
>> >>>
>> >>>
>> >>> D. Matthew Stuart, P.E., S.E., F.ASCE, SECB
>> >>> Structural Division Manager
>> >>>
>> >>> Pennoni Associates Inc.
>> >>> One Drexel Plaza
>> >>> 3001 Market Street, 2nd Floor
>> >>> Philadelphia, PA 19104
>> >>> Office 215-222-3000 x7895 | Direct 215-254-7895
>> >>> Fax 215-222-0789 | Mobile 908-309-8657
>> >>> http://www.pennoni.com | mstuart(--nospam--at)pennoni.com
>> >>>
>> >>>
>> >>
>> >
>> >
>> > --
>> > Alexander Bausk
>> > Civil/Structural design & inspection engineer, CAD professional
>> > MSc Structural engineering, Ph.C. Engineering
>> > http://bausk.wordpress.com
>> > ONILAES Lab at PSACEA
>> > Dnipropetrovsk, Ukraine
>> > Tel. +38 068 4079692
>> > Fax. +38 0562 470263
>> > bauskas(--nospam--at)gmail.com
>> >
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>  		 	   		


-- 
Alexander Bausk
Civil/Structural design & inspection engineer, CAD professional
MSc Structural engineering, Ph.C. Engineering
http://bausk.wordpress.com
ONILAES Lab at PSACEA
Dnipropetrovsk, Ukraine
Tel. +38 068 4079692
Fax. +38 0562 470263
bauskas(--nospam--at)gmail.com

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