Long Valley Volcano - John Seach
California, USA

37.70 N, 118.87 W
summit elevation 3390 m
Caldera

Volcanic Features of Long Valley
Mammoth Mountain, Mammoth Lakes, Glass Mountain, Biship Tuff.
Ground deformation continued at Long Valley in 1999 and earthquake swarms registered in 1998.
The M 7.9 Denali Fault earthquake of 3 November 2002, caused 60 small earthquakes in Long Valley.
This is the third time that a distant earthquake has affected the caldera.
In April 2006 three skiiers were asphyxiated by poisonous gas after falling into a volcanic fissure.

Eruptions of Long Valley
90,000 years ago (Glass Mountain)
 

Long Valley Volcano
www.volcanolive.com
Copyright John Seach