Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #0: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 4:57:29 AM (PDT) on Tuesday, September 30, 2025.
The magnitude 1.6 event occurred 3 km (2 miles) SSW of Belmont, CA.
The hypocentral depth is 1 km (0.50 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Tuesday, September 30, 2025 at 4:57:29 AM (PDT) Tuesday, September 30, 2025 at 11:57:29 (UTC) |
| Distance from |
Belmont, CA - 3 km (2 miles) SSW (207 degrees) San Carlos, CA - 3 km (2 miles) WSW (241 degrees) Emerald Lake Hills, CA - 4 km (2 miles) NW (324 degrees) Redwood City, CA - 5 km (3 miles) W (280 degrees) Highlands-Baywood Park, CA - 6 km (4 miles) SE (126 degrees) |
| Coordinates | 37 deg. 29.6 min. N (37.493N), 122 deg. 17.6 min. W (122.293W) |
| Depth | 0.80 km (0.50 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=12, Nph=12, Dmin=7.9 km, Rmss=0.09 sec, Erho=0.45 km, Erzz=3.18000007 km, Gp=145 degrees |
| Event ID# | nc75242956 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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