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Similar Cascades Volcano Observatory, Mono–Inyo Craters, Panum Crater, Glass Mountain, Coso Volcanic Field | ||
The Long Valley Observatory is the volcano observatory that monitors the volcanic and geologic activity of the Long Valley Caldera of Eastern California.
The volcano observatory is east of the Sierra Nevada in Mono County, California. It is a part of the Volcano Hazards Program of the United States Geological Survey, a scientific agency of the United States government.
References
Long Valley Observatory Wikipedia(Text) CC BY-SA