Earthquake · reviewed by a seismologist
M 2.6md
5km NNW of Diablo, CA
- When
- Magnitude
- M 2.6 (md)
- Depth
- 5.7 km below the surface
- Felt
- 86 reports · strongest reported intensity III
- Nearest
- Contra Costa County, 5 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3066 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 86 people have reported feeling it to USGS.
How big was it?
This earthquake released about 220 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 70,000× the energy of this one
- Magna, Utah 2020 M 5.7 50,000× the energy of this one
- Around the size people start to feel M 3.0 4.4× the energy of this one
- This earthquake M 2.6 about 220 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 37.8805, -121.9797. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Contra Costa County, CA | 5 km (3 mi) | SSW of here | earthquakes near Contra Costa County |
| Alameda County, CA | 27 km (17 mi) | NNW of here | earthquakes near Alameda County |
| Solano County, CA | 43 km (27 mi) | S of here | earthquakes near Solano County |
| San Mateo County, CA | 62 km (39 mi) | NNE of here | earthquakes near San Mateo County |
| San Joaquin County, CA | 62 km (39 mi) | W of here | earthquakes near San Joaquin County |
| Marin County, CA | 70 km (43 mi) | ESE of here | earthquakes near Marin 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.
- 2.9 12km SE of Suisun City, CA
- 2.9 15km ESE of Suisun City, CA
- 2.2 8km SE of Suisun City, CA
- 1.9 10km ESE of Black Point-Green Point, CA
- 3.7 10km ESE of Black Point-Green Point, CA
- 1.8 8km SE of Suisun City, CA
- 1.6 14km ENE of Milpitas, CA
- 1.5 5km NNE of Fremont, CA
- 1.8 3km E of Hayward, CA
- 1.9 3km NNE of Bay Point, CA
- 1.6 3km NW of Castro Valley, CA
- 2.9 2km NW of Castro Valley, CA
- 1.6 8km SSW of Brentwood, CA
- 1.9 7km SSW of Brentwood, CA
- 1.7 2km SE of Danville, 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 520 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.