California Volcano Observatory (Q3348375)

Summary from English Wikipedia (enwiki)

The California Volcano Observatory (CalVO) is the volcano observatory that monitors the volcanic and geologic activity of California and Nevada. It is a part of the Volcano Hazards Program of the United States Geological Survey, a scientific agency of the United States government.

Wikidata location: 37.7000, -118.8700 view on OSM or edit on OSM

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observatory (Q62832) landuse=observatory, man_made=observatory