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Click here for more info on the Long Valley volcano monitoring effort.

#### Data Sources:

Northern California - USGS = U.S. Geological Survey, Menlo Park
Northern California - UCB = University of California, Berkeley
Southern California - USGS = U.S. Geological Survey, Pasadena
Southern California - Caltech = California Institute of Technology
Nevada - UNR = University of Nevada, Reno
Washington, Oregon - UW = University of Washington
Hawaii - HVO = U.S. Geological Survey, Hawaii Volcano Observatory