Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Winters, CA
No earthquake was likely felt in Winters in the 24 hours to 11:02 pm PST (07:02 UTC). The last one was M 4.2, 88 km (55 mi) WNW, at 7:40 pm PDT on 28 July 2026, estimated intensity II (weak) in town; 240 felt reports to USGS. Every earthquake near Winters
This page: a magnitude 1.7 earthquake was recorded 20 km (13 mi) west of Winters, CA, at 3:25 am PST on 17 January 2026 (11:25 UTC), 7.7 km deep.
USGS: 20 km W of Winters, CA
89 km (55 mi) NNE of San Francisco, CA · 30 km (19 mi) NW of Vacaville, CA
- When
- 3:25 am PST on 17 January 2026 ()
- Where
- 20 km (13 mi) west of Winters, CA · earthquakes near Winters
- Magnitude
- M 1.7 (md)
- Depth
- 7.7 km below the surface
- Felt
- no reports yet
- Nearest
- Napa County, 12 km WSW
- Nearest mapped fault
- Hunting Creek-Berryessa fault system, 4 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 287 days ago
Earthquake alerts for Winters, CA
Get a notification in this browser when USGS records an earthquake near Winters, 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 Winters, 20 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: Esparto, Angwin, Yountville, Cottonwood, Deer Park, Saint Helena.
How big was it?
This earthquake released about 10 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 1,500,000× 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 95× the energy of this one
- This earthquake M 1.7 about 10 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 2 earthquakes of M5 or more within 50 km:
- 6.0 The 2014 South Napa, California Earthquake · 39 km SSW of this epicentre
- 5.4 South of Elmira, California · 39 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 38.5572, -122.1988. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Napa County, CA | 12 km (8 mi) | WSW | earthquakes near Napa County |
| Yolo County, CA | 29 km (18 mi) | ENE | earthquakes near Yolo County |
| Solano County, CA | 39 km (24 mi) | SE | earthquakes near Solano County |
| Sonoma County, CA | 63 km (39 mi) | W | earthquakes near Sonoma County |
| Sutter County, CA | 68 km (42 mi) | NE | earthquakes near Sutter County |
| Colusa County, CA | 69 km (43 mi) | N | earthquakes near Colusa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
28 earthquakes have been recorded within 50 km since this one.
- 1.7 1 km WSW of Anderson Springs, CA
- 1.7 6 km ENE of Vallejo, CA
- 1.5 7 km SSW of Calistoga, CA
- 2.1 13 km SE of Middletown, CA
- 2.3 9 km E of Lower Lake, CA
- 2.1 7 km E of Lower Lake, CA
- 2.1 7 km E of Lower Lake, CA
- 2.3 7 km SSW of Yountville, CA
- 1.7 7 km W of Kenwood, CA
- 1.6 3 km S of Anderson Springs, CA
- 2.5 4 km S of Anderson Springs, CA
- 2.5 3 km S of Anderson Springs, CA
- 2.4 1 km ENE of Larkfield-Wikiup, CA
- 1.7 6 km ENE of Vallejo, CA
- 2.0 6 km SE of Napa, 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.