Earthquake · reviewed by a seismologist
M 1.9md
7km WSW of Kenwood, CA
- When
- Magnitude
- M 1.9 (md)
- Depth
- 7.8 km below the surface
- Felt
- 2 reports · strongest reported intensity II
- Nearest
- Napa County, 28 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2230 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.
How big was it?
This earthquake released about 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
- Magna, Utah 2020 M 5.7 540,000× the energy of this one
- Around the size people start to feel M 3.0 48× the energy of this one
- This earthquake M 1.9 about 20 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 38.3863, -122.6142. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Napa County, CA | 28 km (18 mi) | WSW of here | earthquakes near Napa County |
| Sonoma County, CA | 31 km (19 mi) | ESE of here | earthquakes near Sonoma County |
| Marin County, CA | 39 km (24 mi) | NNE of here | earthquakes near Marin County |
| Solano County, CA | 60 km (37 mi) | WNW of here | earthquakes near Solano County |
| Yolo County, CA | 70 km (43 mi) | WSW of here | earthquakes near Yolo County |
| Contra Costa County, CA | 78 km (48 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
33 earthquakes have been recorded within 50 km since this one.
- 2.9 2km NE of The Geysers, CA
- 2.2 3km NW of Anderson Springs, CA
- 1.5 2km W of Cobb, CA
- 1.7 4km NW of The Geysers, CA
- 1.8 2km NW of The Geysers, CA
- 2.6 4km SE of Larkfield-Wikiup, CA
- 1.9 6km WNW of The Geysers, CA
- 1.5 8km WNW of Yountville, CA
- 2.2 3km SW of Anderson Springs, CA
- 1.6 6km ESE of Santa Rosa, CA
- 1.7 2km ENE of The Geysers, CA
- 1.7 2km NW of The Geysers, CA
- 2.3 4km NW of The Geysers, CA
- 1.8 4km SSE of The Geysers, CA
- 1.7 6km E of Santa Rosa, 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 3,200 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.