[irised] wells nevada record, station SHMT

[Craig Messerman]

Hi All,
I'm attaching our record of the Wells quake. My students are analyzing it this week, but the arrival interpretation is difficult. The first motion seems to be the low amplitude waves that arrive at 14:19:18, but then a very distinct and stronger  phase arrives just 21 seconds later, too soon to be an S.  Could be PP? If that's the case then the S arrival seems buried between that phase and the surface arrivals. We haven't had the chance until now to work with such a close and recent event, so if anyone could take a look and advise, we'd appreciate it.

Craig Messerman
Sentinel High School, Missoula, Montana


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