Earthquake · reviewed by a seismologist
M 1.8md
Earthquake near Willows, CA
No earthquake was likely felt in Willows in the 24 hours to 9:10 pm PST (05:10 UTC). The last one was M 4.0, 65 km (40 mi) W, at 5:01 am PDT on 28 October 2026, estimated intensity II (weak) in town; 14 felt reports to USGS. Every earthquake near Willows
This page: a magnitude 1.8 earthquake was recorded 49 km (30 mi) west-northwest of Willows, CA, at 6:49 pm PDT on 14 April 2025 (01:49 UTC), 7.5 km deep. 1 person has reported feeling it to USGS.
USGS: 5 km SW of Alder Springs, CA
- When
- 6:49 pm PDT on 14 April 2025 ()
- Where
- 49 km (30 mi) west-northwest of Willows, CA · earthquakes near Willows
- Magnitude
- M 1.8 (md)
- Depth
- 7.5 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Glenn County, 30 km E
- Nearest mapped fault
- Bartlett Springs fault system, 19 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 574 days ago
Earthquake alerts for Willows, CA
Get a notification in this browser when USGS records an earthquake near Willows, 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 12 km (7 mi) from the epicentre. In Willows, 49 km away, the estimate is intensity I (not felt). 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.
How big was it?
This earthquake released about 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
- Magna, Utah 2020 M 5.7 660,000× the energy of this one
- Around the size people start to feel M 3.0 59× the energy of this one
- This earthquake M 1.8 about 16 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 5.1 on 2016-08-10 — about 80,000 times the energy of this one.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
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 39.6138, -122.7543. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Glenn County, CA | 30 km (19 mi) | E | earthquakes near Glenn County |
| Lake County, CA | 56 km (35 mi) | S | earthquakes near Lake County |
| Mendocino County, CA | 62 km (39 mi) | WSW | earthquakes near Mendocino County |
| Colusa County, CA | 66 km (41 mi) | SE | earthquakes near Colusa County |
| Tehama County, CA | 72 km (45 mi) | NE | earthquakes near Tehama County |
| Butte County, CA | 99 km (61 mi) | E | earthquakes near Butte County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
42 earthquakes have been recorded within 50 km since this one.
- 1.9 12 km N of Upper Lake, CA
- 1.9 13 km SSW of Lake Pillsbury, CA
- 1.7 15 km W of Lake Pillsbury, CA
- 1.7 18 km NE of Upper Lake, CA
- 1.7 17 km SE of Lake Pillsbury, CA
- 1.6 21 km NW of Alder Springs, CA
- 1.6 21 km NW of Alder Springs, CA
- 1.9 20 km NW of Alder Springs, CA
- 1.9 16 km E of Lake Pillsbury, CA
- 1.8 6 km SE of Lake Pillsbury, CA
- 1.5 9 km WNW of Alder Springs, CA
- 1.7 18 km N of Stony Gorge Reservoir, CA
- 1.9 39 km NE of Covelo, CA
- 1.7 20 km NW of Alder Springs, CA
- 1.6 13 km of Lake Pillsbury, 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.