Earthquake · reviewed by a seismologist
M 2.7md
2km SSE of Crockett, CA
- When
- Magnitude
- M 2.7 (md)
- Depth
- 10 km below the surface
- Felt
- 611 reports · strongest reported intensity III
- Nearest
- Contra Costa County, 26 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1826 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 611 people have reported feeling it to USGS.
How big was it?
This earthquake released about 390 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 39,000× the energy of this one
- Magna, Utah 2020 M 5.7 28,000× the energy of this one
- Around the size people start to feel M 3.0 2.5× the energy of this one
- This earthquake M 2.7 about 390 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 38.0395, -122.2047. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Contra Costa County, CA | 26 km (16 mi) | WNW of here | earthquakes near Contra Costa County |
| Solano County, CA | 34 km (21 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 | 51 km (31 mi) | NNW of here | earthquakes near Alameda County |
| Napa County, CA | 53 km (33 mi) | SSE of here | earthquakes near Napa County |
| San Mateo County, CA | 71 km (44 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
48 earthquakes have been recorded within 50 km since this one.
- 3.3 7km S of Muir Beach, CA
- 2.6 0km E of San Pablo, CA
- 2.6 1km WNW of Bay Point, CA
- 1.9 2km NNE of San Leandro, CA
- 1.6 2km NW of Bay Point, CA
- 1.7 2km E of Berkeley, CA
- 1.8 2km SE of Pacheco, CA
- 1.6 3km ESE of Pacheco, CA
- 2.5 0km SE of Rollingwood, CA
- 1.6 0km SE of Rollingwood, CA
- 2.1 4km ESE of Hayward, CA
- 2.1 4km WNW of Dublin, CA
- 1.7 4km WNW of Dublin, CA
- 1.7 4km WNW of Dublin, CA
- 2.3 4km WNW of Dublin, 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 4.5 on 2019-10-15 — it released about 380 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.