Earthquake · reviewed by a seismologist
M 2.1md
10km NW of Rio Vista, CA
- When
- Magnitude
- M 2.1 (md)
- Depth
- 22 km below the surface
- Felt
- no reports yet
- Nearest
- Solano County, 15 km WNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2679 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 38 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 5.8 390,000× the energy of this one
- Magna, Utah 2020 M 5.7 280,000× the energy of this one
- Around the size people start to feel M 3.0 25× the energy of this one
- This earthquake M 2.1 about 38 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 38.2145, -121.7855. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Solano County, CA | 15 km (9 mi) | ESE of here | earthquakes near Solano County |
| Contra Costa County, CA | 36 km (22 mi) | NNE of here | earthquakes near Contra Costa County |
| Sacramento County, CA | 47 km (29 mi) | SW of here | earthquakes near Sacramento County |
| Yolo County, CA | 53 km (33 mi) | S of here | earthquakes near Yolo County |
| San Joaquin County, CA | 55 km (34 mi) | NW of here | earthquakes near San Joaquin County |
| Napa County, CA | 57 km (36 mi) | SE of here | 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.
- 2.1 0km W of Pleasant Hill, CA
- 4.5 1km SSE of Pleasant Hill, CA
- 2.5 1km S of Pleasant Hill, CA
- 1.7 1km SSW of Pleasant Hill, CA
- 1.9 4km SSW of Vallejo, CA
- 1.6 3km SW of Clayton, CA
- 2.3 3km NE of Orinda, CA
- 1.8 3km WNW of Lafayette, CA
- 1.8 3km NE of Orinda, CA
- 1.9 3km NE of Orinda, CA
- 1.9 3km NE of Orinda, CA
- 1.9 3km NE of Orinda, CA
- 2.2 3km NE of Orinda, CA
- 1.6 2km WNW of Pittsburg, CA
- 1.7 3km E of Alamo, 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.