Mono Lake Volcanic Field

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Map shows the potential thickness of tephra on the ground from futu...
December 31, 2012

Map shows the potential thickness of tephra on the ground from futu...

Map shows the potential thickness of tephra on the ground from future eruptions in the Long Valley area.

Mono Lake from Mount Dana, California, United States
December 7, 2010

Mono Lake from Mount Dana, California, United States

Mono Lake is a large, shallow, saline lake in Mono County, California, formed at least 760,000 years ago. It is a terminal lake which means that under natural conditions, evaporation from the lake surface typically is the entire component of lake outflow. If you look closely you will see salt deposits left onshore as the water level has declined to serve the water needs of

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Mono Lake from the Mono Visitor Center (west shore). Negit island i...
December 31, 2007

Mono Lake from the Mono Visitor Center (west shore). Negit island i...

Mono Lake from the Mono Visitor Center (west shore). Negit island is in the middle left and the north part of Paoha is on the right.

Mono Crater viewpoint toward the north with Panam Crater and Poaha ...
June 11, 2007

Mono Crater with Panam Crater and Poaha Island in Mono Lake

Altered rocks in an area of diffuse CO2 upflow on the west side of North Coulee an approximately 660 year old dome in the Mono Craters volcanic chain. Mono Lake and Paoha Island also shown.

Diagram showing Mono-Inyo eruptions in the past 8,000 years
December 31, 1998

Diagram showing Mono-Inyo eruptions in the past 8,000 years

Diagram showing location and timing of the Mono-Inyo eruptions in the past 8,000 years.

Negit Island in Mono Lake, California....
December 31, 1987

Negit Island in Mono Lake, CA.

This high aerial view of Negit Island is toward the southwest. Three separate vents each erupted individual dacite lava flows to form three parallel elongate flows. The vents are located on the highest parts of the flows. The northwest edge of Paoha Island is visible in upper left.

Pahoa Island in Mono Lake, California.
December 31, 1987

Pahoa Island in Mono Lake, CA.

This aerial view toward the south shows the northeastern side of Paoha Island in Mono Lake, California; the Mono Craters and Sierra Nevada are in the far distance. The north (bottom of photo) and east (left side of island) tips of the island consist of craters and lava flows that may have erupted as recently as A.D. 1720-1850.

Negit Island in Mono Lake, California.
December 31, 1978

Negit Island in Mono Lake, CA viewed toward the NW.

Negit Island in Mono Lake, California viewed toward the NW. The three parallel dacite lava flows that form the island are clearly visible.

Mono Lake in the Sierra Nevada Mountains of California. Panum Crate...
December 31, 1868

Mono Lake in the Sierra Nevada Mountains of CA

Photo taken during the U.S. Geological Exploration of the Fortieth Parallel (King Survey).

Map shows hazard zone for pyroclastic flows and surges around exist...

Map shows hazard zone for pyroclastic flows and surges around exist...

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.