Earthquake · reviewed by a seismologist
M 2.8md
11km S of The Geysers, CA
- When
- Magnitude
- M 2.8 (md)
- Depth
- 5.8 km below the surface
- Felt
- 6 reports · strongest reported intensity IV
- Nearest
- Sonoma County, 24 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2995 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.
How big was it?
This earthquake released about 450 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 34,000× the energy of this one
- Magna, Utah 2020 M 5.7 24,000× the energy of this one
- Around the size people start to feel M 3.0 2.1× the energy of this one
- This earthquake M 2.8 about 450 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 38.6810, -122.7380. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Sonoma County, CA | 24 km (15 mi) | NE of here | earthquakes near Sonoma County |
| Napa County, CA | 41 km (25 mi) | WNW of here | earthquakes near Napa County |
| Lake County, CA | 47 km (30 mi) | S of here | earthquakes near Lake County |
| Marin County, CA | 70 km (44 mi) | N of here | earthquakes near Marin County |
| Colusa County, CA | 70 km (44 mi) | SW of here | earthquakes near Colusa County |
| Yolo County, CA | 73 km (45 mi) | W of here | earthquakes near Yolo 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.
- 1.7 5km NW of The Geysers, CA
- 1.9 5km NNW of The Geysers, CA
- 1.6 12km ENE of Cloverdale, CA
- 1.9 7km WNW of The Geysers, CA
- 1.8 5km WNW of Cobb, CA
- 1.6 2km SSW of Anderson Springs, CA
- 1.9 2km ENE of The Geysers, CA
- 1.7 1km NW of The Geysers, CA
- 1.7 2km NNW of The Geysers, CA
- 1.8 7km NW of The Geysers, CA
- 1.8 4km WNW of Cobb, CA
- 2.3 4km WNW of Cobb, CA
- 1.6 6km WNW of The Geysers, CA
- 1.6 9km NW of The Geysers, CA
- 2.1 4km SW of Anderson Springs, 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 2,200 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.