Earthquake · reviewed by a seismologist
M 2.5md
12km ESE of Angwin, CA
- When
- Magnitude
- M 2.5 (md)
- Depth
- -0.2 km below the surface
- Felt
- 5 reports · strongest reported intensity III
- Nearest
- Napa County, 5 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1794 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.
How big was it?
This earthquake released about 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 80,000× the energy of this one
- Magna, Utah 2020 M 5.7 57,000× the energy of this one
- Around the size people start to feel M 3.0 5.1× the energy of this one
- This earthquake M 2.5 about 190 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 38.5483, -122.3130. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Napa County, CA | 5 km (3 mi) | NNE of here | earthquakes near Napa County |
| Yolo County, CA | 39 km (24 mi) | WSW of here | earthquakes near Yolo County |
| Solano County, CA | 45 km (28 mi) | NW of here | earthquakes near Solano County |
| Sonoma County, CA | 53 km (33 mi) | E of here | earthquakes near Sonoma County |
| Marin County, CA | 67 km (42 mi) | NE of here | earthquakes near Marin County |
| Colusa County, CA | 70 km (44 mi) | S of here | earthquakes near Colusa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
33 earthquakes have been recorded within 50 km since this one.
- 1.8 3km ENE of The Geysers, CA
- 1.8 6km W of Allendale, CA
- 1.6 10km WNW of Calistoga, CA
- 2.2 5km E of Vallejo, CA
- 1.8 3km SW of Anderson Springs, CA
- 1.6 5km E of Vallejo, CA
- 2.3 1km NNW of The Geysers, CA
- 1.5 7km S of Calistoga, CA
- 1.6 2km NW of The Geysers, CA
- 2.2 1km NW of The Geysers, CA
- 1.7 2km SW of Cobb, CA
- 1.9 2km WNW of Cobb, CA
- 1.7 3km SW of Angwin, CA
- 1.8 8km NNE of Black Point-Green Point, CA
- 1.8 10km NNE of Windsor, 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 4.2 on 2018-01-18 — it released about 340 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.