A little more info:
These stations are considered part of the Mono Lake volcanic field, even though they are some 40 km or so east of the actual lake.
The signal was received even stronger at LHV:
Here is the trace:
Here is a screenshot of that:
Here is a small res spectro of that:
Here is a waveform view of that:
Note the uneven spacing of the peaks. Mine blasts usually have more even spacing between the peaks.
Note the long duration of this event, lasting some 5 and a half minutes!
Note the lack of spectral banding in the spectro of it. Mine blasts tend to be missing frequencies in some bands, while the shorts peaks in these
clearly have all frequencies up to 25hz, more typical of seismic events.
I suppose it could be a mine blast, if the blast was very close to station. But then I would have to question why the spectro of this event registered
at HCK (the trace you all saw in the op), 21 km away from LHV, showed no spectral banding either. What I am saying is this thing appears to have the
power of a seismic event, and the spectral characteristics to match it.
I don't like it one bit. But I would be very happy, actually, if someone would provide good reasoning why and how this could be a mine blast.
Otherwise, I am not being left with much other of a choice. It may well be a long period volcanic event.
And if it is, then what is it doing so far north and east of the caldera and lake? To be exact, HCK is 29.5 km east of the eastern edge of Mono
Lake(ML), and LHV about 43 km northeast from the eastern edge of ML. To answer another poster's question, yes, it COULD be magma on the move. Then
again, it could be gas or water causing it too. This is why the pros really need to get on this, imo.
Just saying. I am not an expert in these things, and all I can do is speculate with what little knowledge of the situation I have.
And STILL no response back from my contact. That is becoming curious in itself.
edit on Tue Jun 26th 2012 by TrueAmerican because: (no reason