Wednesday, August 24, 2011

Virginia earthquake -- damage at Mineral


Now, I really don't know what to think about this earthquake.  If it was a shallow earthquake, I'm expecting some very high ground motions somewhere.  These people sound like they were hit with a 10 cm/s pulse, which I think is low.  They might all be on the footwall.  When someone goes on a hike they are bound to find places where trees were knocked down.

On the other hand, this earthquake could have been much deeper, which makes more sense to me.  The USGS has no instruments nearby and may be talking through their hat when they said it was shallow.  The felt zone is huge, and resembles the 1988 Saguenay earthquake.

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