Earthquake · automatic estimate, may change
M 1.6md
Earthquake near Ukiah, CA
No earthquake was likely felt in Ukiah in the 24 hours to 1:25 pm PST (21:25 UTC). The last one was M 1.5, 5 km (3 mi) E, at 3:26 am PST on 12 November 2026, estimated intensity II (weak) in town. Every earthquake near Ukiah
This page: a magnitude 1.6 earthquake was recorded 24 km (15 mi) northeast of Ukiah, CA, at 5:34 pm PDT on 1 October 2025 (00:34 UTC), 5.8 km deep. The magnitude and location are an automatic first estimate and may change.
USGS: 13 km SSW of Lake Pillsbury, CA
98 km (61 mi) NNW of Santa Rosa, CA
- When
- 5:34 pm PDT on 1 October 2025 ()
- Where
- 24 km (15 mi) northeast of Ukiah, CA · earthquakes near Ukiah
- Magnitude
- M 1.6 (md)
- Depth
- 5.8 km below the surface
- Felt
- no reports yet
- Nearest
- Lake County, 30 km SE
- Nearest mapped fault
- Bartlett Springs fault system, 8 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 408 days ago
Earthquake alerts for Ukiah, CA
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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 Ukiah, 24 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: Upper Lake, Redwood Valley, Talmage, Nice, North Lakeport, Lakeport.
How big was it?
This earthquake released about 7.1 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 2,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.1 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 180,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.2 6 km ESE of Talmage, California · 22 km SSW 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 39.2978, -123.0000. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake County, CA | 30 km (19 mi) | SE | earthquakes near Lake County |
| Mendocino County, CA | 41 km (25 mi) | WNW | earthquakes near Mendocino County |
| Glenn County, CA | 62 km (38 mi) | ENE | earthquakes near Glenn County |
| Colusa County, CA | 67 km (42 mi) | ESE | earthquakes near Colusa County |
| Sonoma County, CA | 86 km (54 mi) | S | earthquakes near Sonoma County |
| Napa County, CA | 106 km (66 mi) | SE | earthquakes near Napa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
50 earthquakes have been recorded within 50 km since this one.
- 1.8 8 km SE of Lake Pillsbury, CA
- 1.5 6 km ESE of Lake Pillsbury, CA
- 1.6 4 km SSE of Redwood Valley, CA
- 1.7 6 km ENE of Brooktrails, CA
- 1.5 8 km SE of Lake Pillsbury, CA
- 1.7 9 km NE of Talmage, CA
- 1.9 10 km NW of Redwood Valley, CA
- 1.8 7 km NNE of Cloverdale, CA
- 1.5 10 km ESE of Lake Pillsbury, CA
- 1.6 16 km SW of Lakeport, CA
- 2.6 16 km SW of Lakeport, CA
- 1.5 4 km NW of Redwood Valley, CA
- 1.6 4 km NW of Redwood Valley, CA
- 1.6 9 km SSE of Lake Pillsbury, CA
- 2.1 14 km ESE of Boonville, 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.