Earthquake · reviewed by a seismologist
M 2.2md
1km NE of San Leandro, CA
- When
- Magnitude
- M 2.2 (md)
- Depth
- 3.3 km below the surface
- Felt
- 43 reports · strongest reported intensity III
- Nearest
- Alameda County, 23 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3111 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 43 people have reported feeling it to USGS.
How big was it?
This earthquake released about 69 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 220,000× the energy of this one
- Magna, Utah 2020 M 5.7 150,000× the energy of this one
- Around the size people start to feel M 3.0 14× the energy of this one
- This earthquake M 2.2 about 69 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 37.7348, -122.1473. 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 | 27 km (17 mi) | SW of here | earthquakes near Contra Costa County |
| San Mateo County, CA | 41 km (25 mi) | NNE of here | earthquakes near San Mateo County |
| Solano County, CA | 62 km (38 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 | 70 km (43 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
59 earthquakes have been recorded within 50 km since this one.
- 1.7 4km ESE of Union City, CA
- 1.5 4km NNW of Foster City, CA
- 2.2 3km ENE of Oakland, CA
- 2.1 2km ENE of San Ramon, CA
- 3.5 3km ENE of Oakland, CA
- 1.9 13km SE of Livermore, CA
- 1.8 2km ENE of San Ramon, CA
- 1.6 2km ENE of San Ramon, CA
- 1.9 3km WSW of Portola Valley, CA
- 2.0 3km W of Pittsburg, CA
- 2.0 7km NW of San Francisco Zoo, CA
- 1.5 1km ENE of Diablo, CA
- 2.5 2km ENE of Danville, CA
- 1.8 5km SSE of Portola Valley, CA
- 2.2 3km ESE of Berkeley, 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 1,600 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.