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 1:56:55 AM (PDT) on Monday, April 20, 2026.
The magnitude 1.3 event occurred 4 km (2 miles) ESE of San Ramon, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.3 - duration magnitude (Md) |
| Time | Monday, April 20, 2026 at 1:56:55 AM (PDT) Monday, April 20, 2026 at 8:56:55 (UTC) |
| Distance from |
San Ramon, CA - 4 km (2 miles) ESE (109 degrees) Blackhawk, CA - 6 km (4 miles) SSW (203 degrees) Dublin, CA - 7 km (5 miles) N (360 degrees) Danville, CA - 8 km (5 miles) SE (136 degrees) Diablo, CA - 8 km (5 miles) SSE (165 degrees) |
| Coordinates | 37 deg. 46.1 min. N (37.769N), 121 deg. 56.2 min. W (121.936W) |
| Depth | 6.33 km (3.90 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=30, Nph=32, Dmin=2.0 km, Rmss=0.11 sec, Erho=0.21 km, Erzz=0.4 km, Gp=44 degrees |
| Event ID# | nc75348467 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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