Earthquake · reviewed by a seismologist
M 3.0ml
3km NNE of San Leandro, CA
- When
- Magnitude
- M 3.0 (ml)
- Depth
- 7.6 km below the surface
- Felt
- 707 reports · strongest reported intensity IV
- Nearest
- Alameda County, 23 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1211 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 707 people have reported feeling it to USGS.
How big was it?
This earthquake released about 990 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 340,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
- Magna, Utah 2020 M 5.7 11,000× the energy of this one
- This earthquake M 3.0 about 990 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 37.7492, -122.1433. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Alameda County, CA | 23 km (14 mi) | WNW of here | earthquakes near Alameda County |
| Contra Costa County, CA | 25 km (16 mi) | SW of here | earthquakes near Contra Costa County |
| San Mateo County, CA | 42 km (26 mi) | NNE of here | earthquakes near San Mateo County |
| Solano County, CA | 60 km (37 mi) | SSW of here | earthquakes near Solano County |
| Marin County, CA | 63 km (39 mi) | ESE of here | earthquakes near Marin County |
| Santa Clara County, CA | 71 km (44 mi) | NW of here | earthquakes near Santa Clara County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
47 earthquakes have been recorded within 50 km since this one.
- 1.7 4km SW of Vallejo, CA
- 2.2 4km E of Walnut Creek, CA
- 1.7 5km E of Walnut Creek, CA
- 1.6 14km SSE of Livermore, CA
- 1.7 14km SSE of Livermore, CA
- 1.7 14km NE of Alum Rock, CA
- 1.8 4km SSE of Highlands-Baywood Park, CA
- 2.1 6km NNE of San Leandro, CA
- 2.2 6km SSW of Antioch, CA
- 1.9 1km SSE of Diablo, CA
- 1.6 4km NNW of Diablo, CA
- 1.6 3km N of Danville, CA
- 1.6 2km E of Union City, CA
- 2.2 2km ENE of Union City, CA
- 2.3 11km ENE of Milpitas, 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 150 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.