Earthquake · reviewed by a seismologist
M 3.2ml
0km WNW of Pleasant Hill, CA
- When
- Magnitude
- M 3.2 (ml)
- Depth
- 14 km below the surface
- Felt
- 1802 reports · strongest reported intensity IV
- Nearest
- Contra Costa County, 10 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2405 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1802 people have reported feeling it to USGS.
How big was it?
This earthquake released about 1.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 150,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 6,900× the energy of this one
- Magna, Utah 2020 M 5.7 4,900× the energy of this one
- This earthquake M 3.2 about 1.1 tons of TNT
- Around the size people start to feel M 3.0 this one released 2.3× more
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 37.9482, -122.0618. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Contra Costa County, CA | 10 km (6 mi) | WNW of here | earthquakes near Contra Costa County |
| Alameda County, CA | 36 km (22 mi) | NNW of here | earthquakes near Alameda County |
| Solano County, CA | 37 km (23 mi) | SSW of here | earthquakes near Solano County |
| Marin County, CA | 61 km (38 mi) | E of here | earthquakes near Marin County |
| San Mateo County, CA | 65 km (41 mi) | NNE of here | earthquakes near San Mateo County |
| Napa County, CA | 66 km (41 mi) | SSE of here | earthquakes near Napa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 1.5 5km E of Vallejo, CA
- 1.9 4km SSE of Elmira, CA
- 1.8 5km NNW of Green Valley, CA
- 1.6 3km ESE of Hayward, CA
- 2.3 2km ENE of El Cerrito, CA
- 2.1 1km NNE of Piedmont, CA
- 2.2 10km SE of Livermore, CA
- 2.6 0km S of East Richmond Heights, CA
- 2.4 4km N of Lafayette, CA
- 1.7 4km N of Lafayette, CA
- 2.7 10km SE of Livermore, CA
- 2.4 2km E of Pacheco, CA
- 2.0 1km ESE of Pacheco, CA
- 1.9 5km NNW of San Leandro, CA
- 1.9 5km NE of Fairview, 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 68 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.