Earthquake · reviewed by a seismologist
M 3.7mw
Earthquake near Yountville, CA
No earthquake was likely felt in Yountville in the 24 hours to 7:42 am PST (15:42 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 3.7 earthquake was recorded 6 km (4 mi) south-southwest of Yountville, CA, at 1:55 am PST on 17 February 2019 (09:55 UTC), 8.0 km deep. 3,571 people have reported feeling it to USGS.
USGS: 6km SSW of Yountville, CA
10 km (6 mi) NW of Napa, CA · 64 km (40 mi) N of San Francisco, CA
- When
- 1:55 am PST on 17 February 2019 ()
- Where
- 6 km (4 mi) south-southwest of Yountville, CA · earthquakes near Yountville
- Magnitude
- M 3.7 (mw)
- Depth
- 8.0 km below the surface
- Felt
- 3,571 reports · strongest reported intensity IV
- Measured shaking
- intensity V (ShakeMap)
- Nearest
- Napa County, 18 km NNE
- Nearest mapped fault
- West Napa fault, 3 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 2586 days ago
Earthquake alerts for Yountville, CA
Get a notification in this browser when USGS records an earthquake near Yountville, CA. No account or email needed.
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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 75 km (47 mi) from the epicentre. In Yountville, 6 km away, the estimate is intensity III (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.
Likely felt in: Agua Caliente 8 km, intensity III · Napa 12 km, intensity III · Kenwood 15 km, intensity III · Petaluma 25 km, intensity III · Angwin 25 km, intensity III · Rohnert Park 26 km, intensity III · Black Point-Green Point 28 km, intensity III · Santa Rosa 29 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 32,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
- Magna, Utah 2020 M 5.7 1,000× the energy of this one
- This earthquake M 3.7 about 5.4 tons of TNT
- Around the size people start to feel M 3.0 this one released 11× more
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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:
- 6.0 The 2014 South Napa, California Earthquake · 17 km SSE of this epicentre
- 5.4 South of Elmira, California · 44 km E of this epicentre
- 5.3 3 km E of Bloomfield, California · 36 km W of this epicentre
- 5.3 Northern California · 37 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 38.3515, -122.3983. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Napa County, CA | 18 km (11 mi) | NNE | earthquakes near Napa County |
| Solano County, CA | 41 km (26 mi) | ESE | earthquakes near Solano County |
| Marin County, CA | 45 km (28 mi) | SW | earthquakes near Marin County |
| Sonoma County, CA | 50 km (31 mi) | WNW | earthquakes near Sonoma County |
| Yolo County, CA | 56 km (35 mi) | NE | earthquakes near Yolo County |
| Contra Costa County, CA | 62 km (38 mi) | SE | earthquakes near Contra Costa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
14 earthquakes have been recorded within 50 km since this one.
- 1.9 7km N of Kenwood, CA
- 2.6 10km NNE of Napa, CA
- 2.9 4km N of Rodeo, CA
- 1.6 10km ESE of Black Point-Green Point, CA
- 2.5 9km ESE of Black Point-Green Point, CA
- 2.8 9km ESE of Black Point-Green Point, CA
- 2.2 6km SE of Calistoga, CA
- 1.9 7km NE of Healdsburg, CA
- 1.7 7km NNW of Kenwood, CA
- 1.9 6km W of Yountville, CA
- 2.4 1km N of Vine Hill, CA
- 2.0 1km NNE of Pacheco, CA
- 2.0 12km NE of Napa, CA
- 1.8 8km W of Yountville, 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.