Long Valley Caldera | volcano

USA / California / Mammoth Lakes /
 volcano, caldera, draw only border
Large 10 x 19.8 mile (17 x 32 km) caldera (large volcanic collapse depression) formed during a huge eruption 760,000 years ago. This eruption was highly voluminous, with 144 cubic miles (600 cu. km) of rhyolite magma erupted in the form of massive pyroclastic flows (The Bishop Tuff) and extensive ashfall across much of the western US.

This area is closely monitored by the Long Valley Volcano Observatory.
Wikipedia article: http://en.wikipedia.org/wiki/Long_Valley_Caldera
Nearby cities:
Coordinates:   37°40'53"N   118°51'19"W

Comments

  • Discovery Channel has called the Long Valley Caldera a "supervolcano", one that could produce in excess of 1000 cubic kilometers of ejecta. An eruption on this scale could jeopardize the existence of humans.
  • Very dangerous volcano
This article was last modified 9 years ago