PSN-L Email List Message

Subject: Re: Mystery event
From: Brad Douglas rez@..................
Date: Tue, 18 Sep 2007 20:27:17 -0700

On Tue, 2007-09-18 at 16:56 -0700, Bob Hancock wrote:
> I believe there are some physicists that follow this site.  I would like to
> know what they think about the energy involved to make a crater 30 meters
> across and 6 meters deep, and how that would translate into magnitude.

A 5m crater releases on the order of 4.2-4.6GJ of energy equivalent to a
Richter M2.

There is little literature on craters of this size, so a little
extrapolation is in order.  I would say a 30mx6m crater would generate
no more than a M3.

73, de Brad KB8UYR/6 


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