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Long Valley, California Earthquake
Released: 12/29/1997

Contact Information:
U.S. Department of the Interior, U.S. Geological Survey
Office of Communication
119 National Center
Reston, VA 20192
Diane Noserale 1-click interview
Phone: 703-648-4460 | FAX: 703-648-4466




A light earthquake, preliminary magnitude 4.1 according to the U.S. Geological Survey, occurred at 3:02 PM EST (12:02 PM local time) Monday, Dec 29, 1997. The epicenter is located 5 miles SE of Mammoth Lakes, or 33 miles WNW of Bishop, CA. The earthquake was preceded by four tremors with magnitudes in excess of 2.5. Recurring seismic unrest is common in this area as it is the site of an ancient volcanic caldera. The alert level remains green, indicating no immediate risk of volcanic eruption. The USGS will continue to monitor the site through a recently installed dense array of earthquake monitoring equipment. The USGS has received no reports of damage at this time.

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Note to editors: As more information is received and the data are further analyzed, we may issue updates or clarifications on this event.


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