Earthquake · reviewed by a seismologist
M 1.7md
7 km W of San Ramon, California
- When
- Magnitude
- M 1.7 (md)
- Depth
- 14 km below the surface
- Felt
- no reports yet
- Nearest
- Alameda County, 19 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3265 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 89× the energy of this one
- This earthquake M 1.7 about 11 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 37.7707, -122.0573. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Alameda County, CA | 19 km (12 mi) | NW of here | earthquakes near Alameda County |
| Contra Costa County, CA | 19 km (12 mi) | SSW of here | earthquakes near Contra Costa County |
| San Mateo County, CA | 48 km (30 mi) | NE of here | earthquakes near San Mateo County |
| Solano County, CA | 56 km (35 mi) | S of here | earthquakes near Solano County |
| Marin County, CA | 68 km (42 mi) | ESE of here | earthquakes near Marin County |
| Santa Clara County, CA | 69 km (43 mi) | NNW 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
49 earthquakes have been recorded within 50 km since this one.
- 1.6 10km NNE of Alum Rock, CA
- 1.7 4km SW of Stanford, CA
- 2.3 3km N of San Leandro, CA
- 1.5 5km E of Vallejo, CA
- 1.9 3km N of San Leandro, CA
- 2.4 2km E of Berkeley, CA
- 1.5 9km SE of Livermore, CA
- 1.6 2km E of Hayward, CA
- 4.4 2km SE of Berkeley, CA
- 3.9 8km ENE of Alum Rock, CA
- 2.7 0km SW of Pacheco, CA
- 1.5 8km SSE of Rio Vista, CA
- 2.3 2km NW of Pittsburg, CA
- 1.6 5km NNW of Pacifica, CA
- 2.2 5km NNW of Pacifica, 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.
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.