Earthquake · reviewed by a seismologist
M 2.7md
12km NNE of Napa, CA
- When
- Magnitude
- M 2.7 (md)
- Depth
- 11 km below the surface
- Felt
- 33 reports · strongest reported intensity III
- Nearest
- Napa County, 16 km NW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2662 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 33 people have reported feeling it to USGS.
How big was it?
This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
- Magna, Utah 2020 M 5.7 32,000× the energy of this one
- Around the size people start to feel M 3.0 2.8× the energy of this one
- This earthquake M 2.7 about 340 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 38.3872, -122.2158. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Napa County, CA | 16 km (10 mi) | SE of here | earthquakes near Napa County |
| Solano County, CA | 28 km (17 mi) | WNW of here | earthquakes near Solano County |
| Yolo County, CA | 42 km (26 mi) | SW of here | earthquakes near Yolo County |
| Contra Costa County, CA | 57 km (35 mi) | NNW of here | earthquakes near Contra Costa County |
| Marin County, CA | 60 km (37 mi) | NE of here | earthquakes near Marin County |
| Sonoma County, CA | 64 km (40 mi) | ESE of here | earthquakes near Sonoma County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
21 earthquakes have been recorded within 50 km since this one.
- 2.0 9km N of Pittsburg, CA
- 1.8 11km N of Bay Point, CA
- 2.6 10km ESE of Hidden Valley Lake, CA
- 2.6 10km ESE of Hidden Valley Lake, CA
- 2.2 6km WSW of Yountville, CA
- 1.6 1km W of Concord, CA
- 1.9 9km W of Woodland, CA
- 2.3 11km NE of Winters, CA
- 1.7 18km E of Angwin, CA
- 1.5 13km E of Angwin, CA
- 1.9 12km NNE of Angwin, CA
- 1.6 11km ESE of Hidden Valley Lake, CA
- 1.5 13km ESE of Angwin, CA
- 1.5 2km NW of Roseland, CA
- 2.3 8km SW 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.