Earthquake

Tue Aug 23 16:50:16 CDT 2011

My office is fourth floor of eight in Tyson's Corner (20km SW of Wash DC). It is on a rocky hill, so we got a good thrashing. Long event, maybe 40 seconds. The first 30 seconds were pretty typical of magnitude 5+ quakes I've experienced, but there was violent horizontal deflection near the end (peak). Many structures can't take much movement of that kind. There's a w ide floor to ceiling crack in the parking garage wall, broken ceiling tiles, open file cabinets, etc. The quake was apparently just under the level to cause serious damage, but many structures throughout the region will need careful inspection. I think we were very, very lucky it wasn't any stronger. 

73 
Bryan 
KG4UPR 

----- Original Message -----
From: "Brian Hawes" <brian.hawes at retired.ox.ac.uk> 
To: "Tacos" <tacos at amrad.org> 
Sent: Tuesday, August 23, 2011 5:10:47 PM 
Subject: Earthquake 

Hi, 

Just heard on the BBC 10 p.m. news that there has been an earthquake on the East Coast of USA. 
They said offices in D.C. were evacuated, and that it was felt as far as Boston. 

Everybody O.K. ? 

Brian 
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