text:  ...not ask you about the swarming of quakes at Mammoth. Oh, boy. Yes, and they seem to come in waves, don't they? Yes, they do. It caused, again, a D-level alert from the USGS. They've had a number, in fact, one as strong as over four magnitude. So far, none of their alerts have turned out to be, you know... But one of these days, what's liable to happen there?