Earthquake · reviewed by a seismologist
M 2.7md
12km SE of Talmage, CA
- When
- Magnitude
- M 2.7 (md)
- Depth
- 4.1 km below the surface
- Felt
- 25 reports · strongest reported intensity IV
- Nearest
- Lake County, 30 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1330 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 25 people have reported feeling it to USGS.
How big was it?
This earthquake released about 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
- Magna, Utah 2020 M 5.7 30,000× the energy of this one
- Around the size people start to feel M 3.0 2.6× the energy of this one
- This earthquake M 2.7 about 360 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.
Where
Epicentre 39.0417, -123.0855. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Lake County, CA | 30 km (19 mi) | WSW of here | earthquakes near Lake County |
| Mendocino County, CA | 53 km (33 mi) | SE of here | earthquakes near Mendocino County |
| Sonoma County, CA | 59 km (37 mi) | NNW of here | earthquakes near Sonoma County |
| Colusa County, CA | 75 km (46 mi) | WSW of here | earthquakes near Colusa County |
| Glenn County, CA | 86 km (53 mi) | SW of here | earthquakes near Glenn County |
| Napa County, CA | 89 km (55 mi) | NW of here | 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.
- 1.8 3km S of Anderson Springs, CA
- 1.8 3km SW of Anderson Springs, CA
- 1.6 8km W of Cobb, CA
- 1.9 6km NW of The Geysers, CA
- 1.6 8km NW of The Geysers, CA
- 1.5 6km W of Cobb, CA
- 1.8 5km WNW of The Geysers, CA
- 2.0 3km ENE of The Geysers, CA
- 1.5 1km N of The Geysers, CA
- 1.6 3km SE of The Geysers, CA
- 1.6 6km NW of The Geysers, CA
- 2.0 7km ESE of Willits, CA
- 1.9 8km NW of The Geysers, CA
- 1.5 3km NNW of The Geysers, CA
- 1.9 7km 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.
For this area
The largest earthquake within 50 km in our catalogue was M 5.1 on 2016-08-10 — it released about 3,600 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.