Earthquake · reviewed by a seismologist
M 1.5md
4km SW of Glen Ellen, CA
- When
- Magnitude
- M 1.5 (md)
- Depth
- 4.9 km below the surface
- Felt
- no reports yet
- Nearest
- Napa County, 28 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1976 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 5.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.7 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 38.3385, -122.5677. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Napa County, CA | 28 km (18 mi) | SW of here | earthquakes near Napa County |
| Marin County, CA | 36 km (22 mi) | NNE of here | earthquakes near Marin County |
| Sonoma County, CA | 37 km (23 mi) | ESE of here | earthquakes near Sonoma County |
| Solano County, CA | 55 km (34 mi) | W of here | earthquakes near Solano County |
| Yolo County, CA | 69 km (43 mi) | WSW of here | earthquakes near Yolo County |
| Contra Costa County, CA | 71 km (44 mi) | NW of here | earthquakes near Contra Costa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
42 earthquakes have been recorded within 50 km since this one.
- 1.6 11km ENE of Yountville, CA
- 1.9 7km ESE of Roseland, CA
- 1.7 3km SE of The Geysers, CA
- 1.6 8km SW of Calistoga, CA
- 1.6 10km ESE of Angwin, CA
- 1.8 10km ESE of Angwin, CA
- 1.5 14km E of Angwin, CA
- 1.9 10km ESE of Angwin, CA
- 1.7 12km ESE of Angwin, CA
- 1.7 14km E of Angwin, CA
- 3.6 11km ESE of Angwin, CA
- 1.8 14km E of Angwin, CA
- 1.6 15km E of Angwin, CA
- 1.8 12km ENE of Angwin, CA
- 1.6 6km SSW of Calistoga, 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.