Hi Jon,
 
     The Guatemala quake signal was suprisingly  small for a 6.8 - 6.9  
event. I registered about 2.5 to 3 times the  background level, that's for a 
vertical broadband operating at 0.1 to 0.05 Hz  2nd order Butterworth.
I note that Beal School recorded nothing and the BGS is not  particularly 
great in amplitude for an event of this magnitude at a distance of  10500Km.
 
Regards Martin



   





Hi Jon,
 
     The Guatemala quake signal was suprisingl=
y=20
small for a 6.8 - 6.9  event. I registered about 2.5 to 3 times the=20
background level, that's for a vertical broadband operating at 0.1 to 0.05 H=
z=20
2nd order Butterworth.
I note that Beal School recorded nothing and the BGS is not=20
particularly great in amplitude for an event of this magnitude at a distance=
 of=20
10500Km.
 
Regards Martin