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 7:04:54 AM (PDT) on Tuesday, August 18, 2026.
The magnitude 1.7 event occurred 7 km (4 miles) SSE of Portola Valley, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Tuesday, August 18, 2026 at 7:04:54 AM (PDT) Tuesday, August 18, 2026 at 14:04:54 (UTC) |
| Distance from |
Portola Valley, CA - 7 km (4 miles) SSE (149 degrees) Los Altos Hills, CA - 7 km (5 miles) SW (225 degrees) Loyola, CA - 9 km (5 miles) WSW (256 degrees) Los Altos, CA - 9 km (6 miles) SW (231 degrees) West Menlo Park, CA - 11 km (7 miles) S (177 degrees) |
| Coordinates | 37 deg. 19.9 min. N (37.332N), 122 deg. 11.8 min. W (122.197W) |
| Depth | 8.83 km (5.50 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=16, Nph=16, Dmin=3.2 km, Rmss=0.16 sec, Erho=0.56 km, Erzz=0.75999999 km, Gp=93 degrees |
| Event ID# | nc75420587 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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