Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Talmage, CA
Yes: an earthquake was likely felt in Talmage in the last 24 hours. M 1.5, 3 km (2 mi) NE of Talmage, at 3:26 am PST on 12 November 2026 (11:26 UTC); the estimated shaking in Talmage was intensity II (weak). Every earthquake near Talmage
This page: a magnitude 1.7 earthquake was recorded 3 km (2 mi) east-northeast of Talmage, CA, at 5:38 pm PDT on 2 October 2021 (00:38 UTC), 8.9 km deep.
USGS: 3km ENE of Talmage, CA
86 km (54 mi) NNW of Santa Rosa, CA
- When
- 5:38 pm PDT on 2 October 2021 ()
- Where
- 3 km (2 mi) east-northeast of Talmage, CA · earthquakes near Talmage
- Magnitude
- M 1.7 (md)
- Depth
- 8.9 km below the surface
- Felt
- no reports yet
- Nearest
- Lake County, 34 km E
- Nearest mapped fault
- Maacama fault, 3 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 1864 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 9 km (6 mi) from the epicentre. In Talmage, 3 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.
Likely felt in: Ukiah 6 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 12 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 1,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 900,000× the energy of this one
- Around the size people start to feel M 3.0 80× the energy of this one
- This earthquake M 1.7 about 12 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 110,000 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 · 5 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 39.1442, -123.1405. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake County, CA | 34 km (21 mi) | E | earthquakes near Lake County |
| Mendocino County, CA | 41 km (26 mi) | NW | earthquakes near Mendocino County |
| Sonoma County, CA | 71 km (44 mi) | SSE | earthquakes near Sonoma County |
| Colusa County, CA | 78 km (48 mi) | E | earthquakes near Colusa County |
| Glenn County, CA | 81 km (51 mi) | NE | earthquakes near Glenn County |
| Napa County, CA | 100 km (62 mi) | SE | earthquakes near Napa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
46 earthquakes have been recorded within 50 km since this one.
- 2.9 7km W of Cobb, CA
- 1.6 6km W of Cobb, CA
- 1.8 8km NNW of Redwood Valley, CA
- 1.7 8km W of Cobb, CA
- 1.7 5km W of Cobb, CA
- 1.9 6km WNW of The Geysers, CA
- 1.9 6km WNW of The Geysers, CA
- 1.8 14km ESE of Lake Pillsbury, CA
- 2.7 5km WNW of The Geysers, CA
- 1.9 10km NE of Navarro Head, CA
- 1.7 8km W of Cobb, CA
- 2.0 3km WNW of Cobb, CA
- 2.4 4km NW of The Geysers, CA
- 1.6 7km WNW of Cobb, CA
- 1.7 9km NW of The Geysers, 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.