PSN-L Email List Message

Subject: Re: frost quakes
From: jonfr@.........
Date: Fri, 11 Feb 2011 21:53:14 -0000


Hi,

Frost quakes look like normal earthquake. But weaker and might lack the p
and s wave.

I did see few hundred of them earlier this winter in Iceland. There was a
swarm of them taking place close to my Hekla sensors.

Regards,
Jón Frímann.

> 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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