Earthquake · automatic estimate, may change
M 1.6md
Earthquake near San Francisco, CA
No earthquake was likely felt in San Francisco in the 24 hours to 4:31 pm PST (00:31 UTC). The last one was M 2.6, 18 km (11 mi) ENE, at 6:23 pm PST on 1 November 2026, estimated intensity II (weak) in town; 114 felt reports to USGS. Every earthquake near San Francisco
This page: a magnitude 1.6 earthquake was recorded 14 km (9 mi) west of San Francisco, CA, at 8:22 pm PDT on 20 October 2025 (03:22 UTC), 7.6 km deep. The magnitude and location are an automatic first estimate and may change.
USGS: 8 km NW of San Francisco Zoo, CA
14 km (9 mi) W of San Francisco, CA · 13 km (8 mi) NW of Daly City, CA
- When
- 8:22 pm PDT on 20 October 2025 ()
- Where
- 14 km (9 mi) west of San Francisco, CA · earthquakes near San Francisco
- Magnitude
- M 1.6 (md)
- Depth
- 7.6 km below the surface
- Felt
- no reports yet
- Nearest
- Marin County, 34 km NNW
- Nearest mapped fault
- San Andreas fault, under 1 km from its surface trace — near is not the same as on
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 389 days ago
Earthquake alerts for San Francisco, CA
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This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 8 km (5 mi) from the epicentre. In San Francisco, 14 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Tamalpais Valley, Marin City, Tamalpais-Homestead Valley, Sausalito, Daly City, Broadmoor.
How big was it?
This earthquake released about 6.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,200,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
- Around the size people start to feel M 3.0 140× the energy of this one
- This earthquake M 1.6 about 6.8 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.5 on 2019-10-15 — about 22,000 times the energy of this one.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 7.9 The 1906 San Francisco, California Earthquake · 4 km SE of this epicentre
- 5.3 The 1957 San Francisco, California Earthquake · 15 km SE of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 37.7770, -122.5760. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Marin County, CA | 34 km (21 mi) | NNW | earthquakes near Marin County |
| San Francisco County, CA | 40 km (25 mi) | W | earthquakes near San Francisco County |
| San Mateo County, CA | 44 km (27 mi) | SSE | earthquakes near San Mateo County |
| Contra Costa County, CA | 57 km (35 mi) | ENE | earthquakes near Contra Costa County |
| Alameda County, CA | 60 km (37 mi) | ESE | earthquakes near Alameda County |
| Solano County, CA | 78 km (48 mi) | NE | earthquakes near Solano County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 2.5 6 km WNW of Bayview-Montalvin, CA
- 1.8 7 km S of Muir Beach, CA
- 1.9 3 km SE of Pacifica, CA
- 1.8 6 km NNW of Inverness, CA
- 2.3 2 km E of Berkeley, CA
- 1.5 2 km E of Berkeley, CA
- 1.9 4 km WSW of Alamo, CA
- 1.7 5 km SW of San Lorenzo, CA
- 2.9 2 km E of Piedmont, CA
- 1.5 2 km NNE of Millbrae, CA
- 1.7 6 km NW of San Francisco Zoo, CA
- 3.0 3 km SSW of Colma, CA
- 1.9 8 km S of Muir Beach, CA
- 1.6 3 km SSE of Pacifica, CA
- 2.3 2 km SE of Pacifica, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.