Earthquake · reviewed by a seismologist
M 1.5md
Earthquake near Yountville, CA
No earthquake was likely felt in Yountville in the 24 hours to 10:12 pm PST (06:12 UTC). The last one was M 2.4, 19 km (12 mi) SSE, at 10:47 am PDT on 6 October 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Yountville
This page: a magnitude 1.5 earthquake was recorded 9 km (6 mi) east-southeast of Yountville, CA, at 12:27 am PST on 7 December 2022 (08:27 UTC), 8.6 km deep.
USGS: 9km ESE of Yountville, CA
10 km (6 mi) NNE of Napa, CA · 68 km (43 mi) NNE of San Francisco, CA
- When
- 12:27 am PST on 7 December 2022 ()
- Where
- 9 km (6 mi) east-southeast of Yountville, CA · earthquakes near Yountville
- Magnitude
- M 1.5 (md)
- Depth
- 8.6 km below the surface
- Felt
- no reports yet
- Nearest
- Napa County, 15 km NNW
- Nearest mapped fault
- Green Valley fault, 4 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1435 days ago
Earthquake alerts for Yountville, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 5 km (3 mi) from the epicentre. In Yountville, 9 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Napa, Green Valley, Sonoma, Boyes Hot Springs, Fetters Hot Springs-Agua Caliente, Agua Caliente.
How big was it?
This earthquake released about 5.4 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 2,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
- Around the size people start to feel M 3.0 180× the energy of this one
- This earthquake M 1.5 about 5.4 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.
For this area
The largest earthquake within 50 km since 2016 was M 4.4 on 2022-09-14 — about 22,000 times the energy of this one.
Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:
- 6.0 The 2014 South Napa, California Earthquake · 19 km SSW of this epicentre
- 5.4 South of Elmira, California · 33 km ESE of this epicentre
- 5.3 3 km E of Bloomfield, California · 48 km W of this epicentre
- 5.3 Northern California · 50 km W of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 38.3815, -122.2585. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Napa County, CA | 15 km (9 mi) | NNW | earthquakes near Napa County |
| Solano County, CA | 31 km (19 mi) | ESE | earthquakes near Solano County |
| Yolo County, CA | 45 km (28 mi) | NE | earthquakes near Yolo County |
| Marin County, CA | 56 km (35 mi) | SW | earthquakes near Marin County |
| Contra Costa County, CA | 58 km (36 mi) | SSE | earthquakes near Contra Costa County |
| Sonoma County, CA | 60 km (37 mi) | WNW | earthquakes near Sonoma County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 2.8 6km WNW of Allendale, CA
- 1.5 2km NNE of Pleasant Hill, CA
- 2.5 1km SSE of Larkfield-Wikiup, CA
- 1.9 2km SSE of Pacheco, CA
- 1.5 6km NNE of Kenwood, CA
- 1.7 5km E of Vallejo, 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.