Earthquake · reviewed by a seismologist
M 2.1md
Earthquake near Talmage, CA
Yes: an earthquake was likely felt in Talmage in the last 24 hours. M 1.5, 10 km (6 mi) NNE of Talmage, at 12:31 pm PST on 11 November 2026 (20:31 UTC); the estimated shaking in Talmage was intensity II (weak). Every earthquake near Talmage
This page: a magnitude 2.1 earthquake was recorded 17 km (11 mi) south of Talmage, CA, at 4:33 pm PDT on 26 August 2020 (23:33 UTC), less than 1 km deep. 4 people have reported feeling it to USGS.
USGS: 17km S of Talmage, CA
- When
- 4:33 pm PDT on 26 August 2020 ()
- Where
- 17 km (11 mi) south of Talmage, CA · earthquakes near Talmage
- Magnitude
- M 2.1 (md)
- Depth
- -0.6 km below the surface
- Felt
- 4 reports · strongest reported intensity IV
- Nearest
- Lake County, 36 km ENE
- Nearest mapped fault
- Maacama fault, 6 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 2262 days ago
Earthquake alerts for Talmage, CA
Get a notification in this browser when USGS records an earthquake near Talmage, 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 17 km (11 mi) from the epicentre. In Talmage, 17 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: Lakeport, Ukiah, Boonville, Cloverdale, North Lakeport, Kelseyville.
How big was it?
This earthquake released about 44 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 340,000× the energy of this one
- Magna, Utah 2020 M 5.7 240,000× the energy of this one
- Around the size people start to feel M 3.0 22× the energy of this one
- This earthquake M 2.1 about 44 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 30,000 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 · 16 km NNE 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 38.9788, -123.1330. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake County, CA | 36 km (23 mi) | ENE | earthquakes near Lake County |
| Sonoma County, CA | 54 km (33 mi) | SSE | earthquakes near Sonoma County |
| Mendocino County, CA | 57 km (35 mi) | NNW | earthquakes near Mendocino County |
| Colusa County, CA | 80 km (50 mi) | ENE | earthquakes near Colusa County |
| Napa County, CA | 87 km (54 mi) | SE | earthquakes near Napa County |
| Glenn County, CA | 94 km (58 mi) | NE | earthquakes near Glenn County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 1.5 10km ESE of Willits, CA
- 2.2 3km NW of Anderson Springs, CA
- 1.5 7km NW of The Geysers, CA
- 3.0 21km NNW of Boonville, CA
- 1.5 2km W of Cobb, CA
- 1.7 4km NW of The Geysers, CA
- 1.8 7km NW of The Geysers, CA
- 1.5 5km S of Lake Pillsbury, CA
- 1.8 2km NW of The Geysers, CA
- 1.7 8km NW of The Geysers, CA
- 1.9 10km ESE of Willits, CA
- 1.6 11km ESE of Willits, CA
- 1.6 11km ESE of Willits, CA
- 1.6 10km ESE of Willits, CA
- 2.6 11km ESE of Willits, 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.