Earthquake · automatic estimate, may change
M 2.6md
6 km W of Yountville, CA
- When
- Magnitude
- M 2.6 (md)
- Depth
- 8.3 km below the surface
- Felt
- 37 reports · strongest reported intensity III
- Nearest
- Napa County, 15 km NE
- Nearest mapped fault
- West Napa fault, 2 km from its surface trace — near is not the same as on
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 1 hour ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 37 people have reported feeling it to USGS.
How big was it?
This earthquake released about 220 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 68,000× the energy of this one
- Magna, Utah 2020 M 5.7 48,000× the energy of this one
- Around the size people start to feel M 3.0 4.3× the energy of this one
- This earthquake M 2.6 about 220 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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| felt reports | 36 | 37 | |
| felt reports | 32 | 36 | |
| felt reports | 31 | 32 | |
| felt reports | 28 | 31 | |
| felt reports | 23 | 28 | |
| reported intensity | 3.3 | 3.1 | |
| felt reports | 13 | 23 | |
| reported intensity | 3.1 | 3.3 | |
| felt reports | 2 | 13 | |
| reported intensity | not reported | 3.1 | |
| felt reports | not reported | 2 |
Where
Epicentre 38.3988, -122.4240. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Napa County, CA | 15 km (9 mi) | SW of here | earthquakes near Napa County |
| Solano County, CA | 45 km (28 mi) | WNW of here | earthquakes near Solano County |
| Sonoma County, CA | 46 km (29 mi) | ESE of here | earthquakes near Sonoma County |
| Marin County, CA | 48 km (30 mi) | NE of here | earthquakes near Marin County |
| Yolo County, CA | 55 km (34 mi) | SW of here | earthquakes near Yolo County |
| Contra Costa County, CA | 67 km (42 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
No further earthquakes have been recorded within 50 km since this one.
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 4.4 on 2022-09-14 — it released about 520 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.