Earthquake · reviewed by a seismologist
M 1.9md
2km ENE of Berkeley, CA
- When
- Magnitude
- M 1.9 (md)
- Depth
- 8.5 km below the surface
- Felt
- no reports yet
- Nearest
- Contra Costa County, 27 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1465 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
- Magna, Utah 2020 M 5.7 500,000× the energy of this one
- Around the size people start to feel M 3.0 45× the energy of this one
- This earthquake M 1.9 about 21 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 37.8777, -122.2532. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Contra Costa County, CA | 27 km (17 mi) | W of here | earthquakes near Contra Costa County |
| Alameda County, CA | 39 km (24 mi) | NW of here | earthquakes near Alameda County |
| Marin County, CA | 47 km (29 mi) | ESE of here | earthquakes near Marin County |
| Solano County, CA | 51 km (32 mi) | SSW of here | earthquakes near Solano County |
| San Mateo County, CA | 53 km (33 mi) | NNE of here | earthquakes near San Mateo County |
| Napa County, CA | 70 km (44 mi) | S of here | earthquakes near Napa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 1.7 5km E of Vallejo, CA
- 2.6 8km WSW of Muir Beach, CA
- 1.7 5km NNE of Diablo, CA
- 2.9 5km NNE of Diablo, CA
- 1.7 3km NW of Diablo, CA
- 2.1 2km E of Berkeley, CA
- 1.7 5km WNW of Dublin, CA
- 1.9 7km ESE of Pleasanton, CA
- 1.7 5km E of Vallejo, CA
- 2.4 5km NNE of Diablo, CA
- 1.9 4km ENE of San Ramon, CA
- 1.7 3km SW of El Cerrito, CA
- 2.7 2km SSW of Alamo, CA
- 1.6 2km W of Walnut Creek, CA
- 1.7 11km N of Bay Point, 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 6,900 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.