Earthquake · reviewed by a seismologist
M 1.9md
5km W of Glen Ellen, CA
- When
- Magnitude
- M 1.9 (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 1965 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 600,000× the energy of this one
- Magna, Utah 2020 M 5.7 420,000× the energy of this one
- Around the size people start to feel M 3.0 38× the energy of this one
- This earthquake M 1.9 about 25 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 38.3668, -122.5925. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Napa County, CA | 28 km (17 mi) | SW of here | earthquakes near Napa County |
| Sonoma County, CA | 34 km (21 mi) | ESE of here | earthquakes near Sonoma County |
| Marin County, CA | 38 km (23 mi) | NNE of here | earthquakes near Marin County |
| Solano County, CA | 58 km (36 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 | 75 km (47 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
37 earthquakes have been recorded within 50 km since this one.
- 1.8 12km ENE of Angwin, CA
- 1.6 6km SSW of Calistoga, CA
- 2.4 2km SW of Anderson Springs, CA
- 1.9 1km NNW of Crockett, CA
- 1.7 5km E of Vallejo, CA
- 1.7 1km ESE of The Geysers, CA
- 1.8 6km ESE of Santa Rosa, CA
- 1.6 14km E of Angwin, CA
- 2.0 7km S of Anderson Springs, CA
- 1.7 11km E of Hidden Valley Lake, CA
- 1.6 2km N of The Geysers, CA
- 1.5 12km E of Angwin, CA
- 1.6 13km ESE of Angwin, CA
- 1.6 14km ESE of Angwin, CA
- 2.1 10km ESE of Angwin, 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 2,500 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.