It was at Cloud Peak's Cordero rojo coal mine, 18 miles south of Gillette,
a surface explosion with a magnitude of ~ 4.5, shortly after 11am.

On Tue, May 1, 2012 at 9:01 PM, Thomas Dick wro=
te:

>  On 5/1/2012 9:41 PM, Randall Pratt wrote:
>
> ** **
>
> This must have been some blast!  I=92m 365 miles east and clearly picked =
it
> up.  I=92ve never seen one in the years I have been recording here.  As y=
ou
> can see in the file I posted it doesn=92t really look like a quake.  The =
P is
> not distinct and all the energy is high freq.  I haven=92t been able to
> contact my son who lives in Gillette to get his thoughts.  I stopped my
> helicorder web update to keep the image on the web page between the ****
> Mexico**** quakes for reference.  http://mit.midco.net/rpratt****
>
> ** **
>
> Randy****
>
> ** **
>  ****
>
> I got good copy here in Evansville, IN as well......busy day!!!!
>
It was at Cloud Peak's Cordero rojo coal mine, 18 miles south of Gillet=
te,
a surface explosion with a magnitude of ~ 4.5, shortly after 11am.<=
br>
On Tue, May 1, 2012 at 9:01 PM, Thomas Di=
ck <dickthomas01@.............> wrote:


 =20
   =20
 =20
  

    On 5/1/2012 9:41 PM, Randall Pratt wrote:
    

     =20
     =20
      
        
         =20
         =20
          

            
This must have been some blast!=A0
                  I=92m 365 miles
                  east and clearly picked it up.=A0 I=92ve never seen one i=
n
                  the years I
                  have been recording here.=A0 As you can see in the file
                  I posted it doesn=92t
                  really look like a quake. =A0The P is not distinct and
                  all the energy is
                  high freq. =A0I haven=92t been able to contact my son who
                  lives in
                  Gillette to get his thoughts.=A0 I stopped my helicorder
                  web update to keep
                  the image on the web page between the Mexic=
o
                  quakes for reference.=A0 http://mit.midco.net/rpratt
            
=A0
            
Randy
            
=A0
          
        
    I got good copy here in Evansville, IN as well......busy day!!!!