Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Temelec, CA
No earthquake was likely felt in Temelec in the 24 hours to 5:02 am PST (13:02 UTC). The last one was M 2.4, 21 km (13 mi) E, at 10:47 am PDT on 6 October 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Temelec
This page: a magnitude 1.7 earthquake was recorded 7 km (4 mi) west of Temelec, CA, at 7:15 am PDT on 21 August 2025 (14:15 UTC), 8.4 km deep.
USGS: 7 km W of Temelec, CA
6 km (4 mi) ENE of Petaluma, CA · 55 km (34 mi) NNW of San Francisco, CA
- When
- 7:15 am PDT on 21 August 2025 ()
- Where
- 7 km (4 mi) west of Temelec, CA · earthquakes near Temelec
- Magnitude
- M 1.7 (md)
- Depth
- 8.4 km below the surface
- Felt
- no reports yet
- Nearest
- Marin County, 28 km SW
- Nearest mapped fault
- Rodgers Creek fault, 2 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 441 days ago
Earthquake alerts for Temelec, CA
Get a notification in this browser when USGS records an earthquake near Temelec, CA. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 9 km (6 mi) from the epicentre. In Temelec, 7 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.
Likely felt in: Petaluma 7 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
- Around the size people start to feel M 3.0 99× the energy of this one
- This earthquake M 1.7 about 9.6 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 4.4 on 2022-09-14 — about 12,000 times the energy of this one.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 6.0 The 2014 South Napa, California Earthquake · 23 km ESE of this epicentre
- 5.3 3 km E of Bloomfield, California · 22 km WNW of this epicentre
- 5.3 Northern California · 24 km WNW 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 38.2575, -122.5665. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Marin County, CA | 28 km (17 mi) | SW | earthquakes near Marin County |
| Napa County, CA | 35 km (22 mi) | NE | earthquakes near Napa County |
| Sonoma County, CA | 43 km (27 mi) | NW | earthquakes near Sonoma County |
| Solano County, CA | 55 km (34 mi) | E | earthquakes near Solano County |
| Contra Costa County, CA | 66 km (41 mi) | SE | earthquakes near Contra Costa County |
| San Francisco County, CA | 72 km (45 mi) | SW | earthquakes near San Francisco County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
30 earthquakes have been recorded within 50 km since this one.
- 1.7 6 km ENE of Vallejo, CA
- 1.6 10 km ESE of Black Point-Green Point, CA
- 2.1 6 km SW of Kenwood, CA
- 1.6 8 km NNW of Lafayette, CA
- 1.6 7 km NNW of Lafayette, CA
- 1.5 7 km NNW of Lafayette, CA
- 2.9 7 km N of Orinda, CA
- 2.4 4 km SW of Monte Rio, CA
- 2.1 3 km ENE of Stinson Beach, CA
- 2.8 8 km NNW of Lafayette, CA
- 2.3 7 km NNW of Lafayette, CA
- 2.1 8 km ENE of Vallejo, CA
- 1.6 6 km ESE of Santa Venetia, CA
- 2.1 1 km SW of Vallejo, CA
- 2.2 11 km SE of Temelec, 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.