Earthquake · reviewed by a seismologist
M 3.1ml
3km ESE of Cloverdale, CA
- When
- Magnitude
- M 3.1 (ml)
- Depth
- 1.3 km below the surface
- Felt
- 179 reports · strongest reported intensity IV
- Nearest
- Sonoma County, 31 km S
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1264 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 179 people have reported feeling it to USGS.
How big was it?
This earthquake released about 1,600 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 210,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 9,400× the energy of this one
- Magna, Utah 2020 M 5.7 6,700× the energy of this one
- This earthquake M 3.1 about 1,600 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.7× more
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 38.7967, -122.9833. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Sonoma County, CA | 31 km (19 mi) | N of here | earthquakes near Sonoma County |
| Lake County, CA | 40 km (25 mi) | SSW of here | earthquakes near Lake County |
| Napa County, CA | 66 km (41 mi) | WNW of here | earthquakes near Napa County |
| Colusa County, CA | 77 km (48 mi) | WSW of here | earthquakes near Colusa County |
| Mendocino County, CA | 81 km (50 mi) | SSE of here | earthquakes near Mendocino County |
| Marin County, CA | 85 km (53 mi) | NNW of here | earthquakes near Marin 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 6km WNW of Cobb, CA
- 1.6 8km NW of The Geysers, CA
- 1.9 14km S of Talmage, CA
- 1.9 3km W of Cobb, CA
- 1.9 1km NW of The Geysers, CA
- 2.5 8km NW of The Geysers, CA
- 1.8 7km WNW of Cobb, CA
- 1.9 6km W of Cobb, CA
- 1.8 7km WNW of Cobb, CA
- 1.8 7km WNW of Cobb, CA
- 1.6 7km W of Cobb, CA
- 1.6 7km WNW of Cobb, CA
- 1.6 2km SW of Cobb, CA
- 1.8 2km SSW of Cobb, CA
- 2.8 6km 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 5.0 on 2016-12-14 — it released about 620 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.