Earthquake · reviewed by a seismologist
M 1.6md
6km WNW of Mountain House, CA
- When
- Magnitude
- M 1.6 (md)
- Depth
- 12 km below the surface
- Felt
- no reports yet
- Nearest
- Alameda County, 31 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2879 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 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
- Around the size people start to feel M 3.0 120× the energy of this one
- This earthquake M 1.6 about 8.1 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 37.7945, -121.6140. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Alameda County, CA | 31 km (19 mi) | ENE of here | earthquakes near Alameda County |
| Contra Costa County, CA | 33 km (20 mi) | ESE of here | earthquakes near Contra Costa County |
| San Joaquin County, CA | 34 km (21 mi) | WSW of here | earthquakes near San Joaquin County |
| Stanislaus County, CA | 60 km (37 mi) | WNW of here | earthquakes near Stanislaus County |
| Solano County, CA | 60 km (37 mi) | SSE of here | earthquakes near Solano County |
| Santa Clara County, CA | 64 km (40 mi) | N 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
58 earthquakes have been recorded within 50 km since this one.
- 1.8 10km E of Alum Rock, CA
- 1.5 12km E of Blackhawk, CA
- 1.6 14km SSE of Livermore, CA
- 2.1 9km NNE of Alum Rock, CA
- 1.5 9km NNE of Alum Rock, CA
- 1.8 2km NE of San Leandro, CA
- 2.3 2km SSE of Concord, CA
- 2.0 3km E of Union City, CA
- 1.7 5km WNW of Sunol, CA
- 1.7 3km WNW of Diablo, CA
- 2.3 8km E of Alum Rock, CA
- 1.7 11km SE of Livermore, CA
- 1.6 5km SW of Pacheco, CA
- 2.7 3km NNE of San Ramon, CA
- 2.4 1km N of Vine Hill, 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.