Earthquake · reviewed by a seismologist
M 1.5md
3km S of Crockett, CA
- When
- Magnitude
- M 1.5 (md)
- Depth
- 7.4 km below the surface
- Felt
- no reports yet
- Nearest
- Contra Costa County, 25 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2787 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
- Around the size people start to feel M 3.0 180× the energy of this one
- This earthquake M 1.5 about 5.4 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 38.0242, -122.2092. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Contra Costa County, CA | 25 km (16 mi) | WNW of here | earthquakes near Contra Costa County |
| Solano County, CA | 36 km (22 mi) | SW of here | earthquakes near Solano County |
| Marin County, CA | 47 km (29 mi) | E of here | earthquakes near Marin County |
| Alameda County, CA | 49 km (31 mi) | NNW of here | earthquakes near Alameda County |
| Napa County, CA | 55 km (34 mi) | S of here | earthquakes near Napa County |
| San Mateo County, CA | 69 km (43 mi) | NNE of here | earthquakes near San Mateo County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 2.1 6km SSW of Yountville, CA
- 1.6 2km S of Alamo, CA
- 2.2 3km ESE of Berkeley, CA
- 1.9 4km SE of Rodeo, CA
- 1.7 1km N of East Richmond Heights, CA
- 2.0 5km N of San Leandro, CA
- 1.8 3km S of Alamo, CA
- 1.7 4km ESE of American Canyon, CA
- 3.4 2km NE of Pacheco, CA
- 1.5 2km W of Crockett, CA
- 2.0 5km WSW of Yountville, CA
- 1.9 4km NE of Vallejo, CA
- 2.0 6km WSW of Colma, CA
- 1.5 3km ESE of Rodeo, CA
- 1.5 12km E of Blackhawk, 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 4.4 on 2018-01-04 — it released about 21,000 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.