Unified Interior Regions

Mammoth Mountain summit from McCoy Station (halfway up) in the late summer.

Skyline above timberline is the Lassen domefield. Reading Peak, Bumpass Mountain, Mount, Crescent Crater, and hill 8283 are part of the Bumpass sequence. The flow of Kings Creek, Lassen Peak, and Chaos Crags are part of the Eagle Peak sequence. Hill 6975, Raker Peak, Fairfield Peak, Hat Mountain and Cinder Cone are vents the Twin Lakes sequence. Painted Dunes and Fantastic

Poster about the USGS Pacific Coastal and Marine Science Center's study from 2001-2004, on Englebright Dam and the science behind its removal.

CalVO's Stuart Wilkinson skis out to a remote seismic instrument in the Long Valley volcanic region to perform routine maintenance.

The stories in the May - June 2012 issue of Sound Waves:

https://archive.usgs.gov/archive/sites/soundwaves.usgs.gov/2012/06/

Gas Hydrates and Climate Warming—Why a Methane Catastrophe Is Unlikely 

Real-Time Mapping of Seawater and Atmospheric

California condors are one of the most endangered birds in North America. In the early 1990s, captive-bred condors were reintroduced into the wild in California. As of January 2010, about 190 condors now live in the wild and more reintroductions are being considered. To facilitate this, USGS researchers are assisting Fish and Wildlife Service in its condor research program

Map shows hazard zone for pyroclastic flows and surges around existing explosive vents along the Mono-Inyo Craters volcanic chain and from potential vents located in Long Valley's south moat.

Long Valley Caldera and domes viewed from the top of Mammoth Mountain. Mono Lake visible in upper left of photo.

The Long Valley Caldera was formed 760,000 years ago when 600 cubic kilometers (150 cubic miles) of magma (molten rock) was erupted over the period of six days. As the magma was ejected, the roof of the magma storage region collapsed forming a 17 by 32 km (9 by 18 mile), oval-shaped depression known as the Long Valley Caldera. The deposits from the large eruption are

The false-color aerial photo shows Cinder Cone and its related volcanic deposits as barren gray areas.

Poster about the USGS Pacific Coastal and Marine Science Center's oceanographic studies offshore of San Francisco Bay, from 1989-2003.