PSN-L Email List Message

Subject: frost quakes
From: Thomas Dick dickthomas01@.............
Date: Fri, 11 Feb 2011 15:50:36 -0600

Here in the Midwest they are talking about booming sounds caused by what 
the news people are calling frost quakes. Has anyone recorded one of 
these? What does it look like? I have recorded "things" on my 
instruments that I can positively identify as the ice cracking on my 
lake but this is new.

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