USGS Volcano Hazards Program Volcano Update

The real-time computer system located two small earthquakes in the vicinity of Long Valley caldera since the last update at 10:04 AM (PST) on November 21. A magnitude M=1.6 earthquake at 6:00 AM was located in the Sierra Nevada south of the caldera (14 miles WSW of Tom's Place), and M=0.8 earthquake at 9:40 AM was located beneath Mammoth Mountain, both on the 22nd.