Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Redwood Valley, CA
Yes: an earthquake was likely felt in Redwood Valley in the last 24 hours. M 1.8, 9 km (5 mi) N of Redwood Valley, at 10:23 pm PST on 10 November 2026 (06:23 UTC); the estimated shaking in Redwood Valley was intensity II (weak). Every earthquake near Redwood Valley
This page: a magnitude 1.6 earthquake was recorded 8 km (5 mi) northwest of Redwood Valley, CA, at 8:51 pm PDT on 15 August 2026 (03:51 UTC), 6.8 km deep.
USGS: 8 km NW of Redwood Valley, CA
- When
- 8:51 pm PDT on 15 August 2026 ()
- Where
- 8 km (5 mi) northwest of Redwood Valley, CA · earthquakes near Redwood Valley
- Magnitude
- M 1.6 (md)
- Depth
- 6.8 km below the surface
- Felt
- no reports yet
- Nearest
- Mendocino County, 20 km NW
- Nearest mapped fault
- Maacama fault, 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 77 days ago
Earthquake alerts for Redwood Valley, CA
Get a notification in this browser when USGS records an earthquake near Redwood Valley, 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 8 km (5 mi) from the epicentre. In Redwood Valley, 8 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: Willits, Brooktrails, Ukiah, Talmage.
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 5.6 on 2026-06-24 — about 1,100,000 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 · 27 km SSE 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 39.3157, -123.2687. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Mendocino County, CA | 20 km (12 mi) | NW | earthquakes near Mendocino County |
| Lake County, CA | 51 km (31 mi) | ESE | earthquakes near Lake County |
| Glenn County, CA | 81 km (50 mi) | ENE | earthquakes near Glenn County |
| Colusa County, CA | 90 km (56 mi) | E | earthquakes near Colusa County |
| Sonoma County, CA | 93 km (58 mi) | SSE | earthquakes near Sonoma County |
| Napa County, CA | 121 km (75 mi) | SE | earthquakes near Napa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 3.4 14 km N of Brooktrails, CA
- 1.5 9 km NW of Redwood Valley, CA
- 1.7 2 km WNW of Lake Pillsbury, CA
- 1.5 11 km N of Brooktrails, CA
- 1.8 7 km NW of North Lakeport, CA
- 1.4 8 km SE of Willits, CA
- 2.1 17 km NE of Nice, CA
- 1.5 9 km NW of Redwood Valley, CA
- 2.2 10 km W of Boonville, CA
- 1.7 16 km NNE of Brooktrails, CA
- 2.2 6 km N of Redwood Valley, CA
- 1.0 1 km NNW of Redwood Valley, CA
- 1.5 11 km N of Redwood Valley, CA
- 2.1 10 km W of Boonville, CA
- 2.2 15 km N of Brooktrails, 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.