Brad Douglas wrote:
> 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.

Computing Projectile Size from Crater Diameter
http://www.lpl.arizona.edu/tekton/crater_p.html

Scientist Confirms Meteorite in Puno, Peru is a Chondrite
> http://www.livinginperu.com/news-4730-environmentnature-scientist-confirms-meteorite-in-puno-peru-is-a-chondrite

-- 
regards
Mark

__________________________________________________________

Public Seismic Network Mailing List (PSN-L)