USGS Volcano Hazards Program Volcano Update

The real-time computer system located eight small earthquakes in the vicinity of Long Valley caldera since the last update at 9:17 AM (PST) on November 5. Four were located in the south moat of the caldera beneath the west end of the airport (6 miles east of Mammoth Lakes). They occurred between 3:26 PM and 4:56 PM on the 5th. The largest was the magnitude M=1.1 earthquake at 4:56 PM. The remaining four were located in the Sierra Nevada south of the caldera. The larges of these was a M=1.0 earthquake at 3:35 PM on the 5th located 11 miles SW of Tom's Place.