"I have learned through bitter experience... that these decisions are not to be made lightly. Back a few years ago I would have bet you a million bucks...that Mammoth Mountain was about to go up. We began to talk about the possibility of putting that town on alert. Thank God the mountain didn't go up, but the damage had already been done.
The word leaked out that the U.S.G.S. Had expressed concern. So the tourists panicked and stayed away. The real estate values plummeted, and the town nearly went bankrupt. Consequently, I'm now a lot more cautious...when it comes to even talking about putting a town on alert. "
At this point because it has calmed in the last 10 hours I wouldn't expect them to go to yellow alert. But you make a very good point that they will hold back.
But I don't know the timing of the serge movement of the Magma in the caldera. I don't know when it will return to the west end of the caldera. At that point we will see another increase in quakes.