[Island Chris]

Brian, if it is a dike injection, like (I think) some of the 1980s were, you may see it getting shallower; let us know. I was at Long Valley in 1988 on a UCSB field trip with R. Bailey of USGS. Was a cool moment when we were sitting on the top of the hill overlooking a road intersection that at the time was the only escape road from Mammoth Mountain. The quakes got really shallow, and USGS really thought there would be an eruption. Lots of flack (threats?) from Real Estate interests. USGS may have moved their office from Bishop to Nevada because they thought there would be a big eruption. Or, this last may not be true.

I did a long reply to your reply below and accidentally deleted it; did not feel like retyping it...
Chris