I felt it too in Western PA. Some observations; it was a back and forth motion with a period of about .6 seconds. I have felt the rumbling of trains, truck, and cranes, These have a higher frequency that is more of a rumbling, about 10 hertz or so. The earth quake produced no plaster cracks, brick wall cracks or the like. I must have had a long wavelength and the local distortions were minimal. It moved very fast for a low frequency wave so the wavelength must have been miles in length.
Some reported an up and down motion first before the shaking. I did not detect an up and down motion. This was a first time for me also. Frank Z -----Original Message----- From: Roarty, Francis X <[email protected]> To: vortex-l <[email protected]> Sent: Tue, Aug 23, 2011 10:45 am Subject: [Vo]:my first earthquake Didn’t think I would ever feel an earthquake in NJ but my entire office was shaking and I thought my peers were just having a go at me by rocking cabinets on either side of my cube. If that 5.8 was centered all the way down near Richmond I can’t imagine how it still felt so strong up here.
