Recent Earthquakes in California and Nevada


== PRELIMINARY EARTHQUAKE REPORT ==

U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California


Version #2: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 9:40:13 AM (PDT) on Sunday, April 4, 2021.
The magnitude 1.0 event occurred 30 km (19 miles) NW of Chester, CA.
The hypocentral depth is 3 km ( 2 miles).


Magnitude 1.0 - duration magnitude (Md)
Time Sunday, April 4, 2021 at 9:40:13 AM (PDT)
Sunday, April 4, 2021 at 16:40:13 (UTC)
Distance from Chester, CA - 30 km (19 miles) NW (307 degrees)
Shingletown, CA - 31 km (20 miles) E (94 degrees)
Burney, CA - 47 km (29 miles) SSE (165 degrees)
Greenville, CA - 61 km (38 miles) NW (308 degrees)
Palo Cedro, CA - 62 km (38 miles) E (99 degrees)
Coordinates 40 deg. 28.3 min. N (40.471N), 121 deg. 31.1 min. W (121.518W)
Depth 2.51 km (1.6 miles)
Quality Good
Location Quality Parameters Nst=6, Nph=8, Dmin=0.8 km, Rmss=0.03 sec, Erho=0.52 km, Erzz=0.34 km, Gp=129 degrees
Event ID# nc73545495
Additional Information Map

For more information, see https://earthquake.usgs.gov

[ Index map || Big earthquake list || All earthquake list || Glossary of terms || Top page ]
[ Did you feel it? || ShakeMaps || Relative2Me ]
[ Data Sources ]

Special maps
Long Valley || Los Angeles || San Francisco

Data Sources
US and World - USGS/NEIC = National Earthquake Information Center
Northern California - UCB = University of California, Berkeley
Southern California - Caltech = California Institute of Technology
Nevada - UNR = University of Nevada, Reno
Offshore = West Coast & Alaska Tsunami Warning Center
...all members of the Advanced National Seismic System (ANSS)