Earthquake · reviewed by a seismologist
M 2.0md
Earthquake near Napa, CA
No earthquake was likely felt in Napa in the 24 hours to 10:24 pm PST (06:24 UTC). The last one was M 2.4, 6 km (3 mi) SE, at 10:47 am PDT on 6 October 2026, estimated intensity III (weak) in town; 1 felt report to USGS. Every earthquake near Napa
This page: a magnitude 2.0 earthquake was recorded 12 km (7 mi) northeast of Napa, CA, at 9:41 pm PST on 27 February 2019 (05:41 UTC), 8.3 km deep. 1 person has reported feeling it to USGS.
USGS: 12km NE of Napa, CA
13 km (8 mi) ENE of Napa, CA · 68 km (42 mi) NNE of San Francisco, CA
- When
- 9:41 pm PST on 27 February 2019 ()
- Where
- 12 km (7 mi) northeast of Napa, CA · earthquakes near Napa
- Magnitude
- M 2.0 (md)
- Depth
- 8.3 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Napa County, 21 km NW
- Nearest mapped fault
- Green Valley fault, 2 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 2814 days ago
Earthquake alerts for Napa, 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 14 km (9 mi) from the epicentre. In Napa, 12 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.
Likely felt in: Napa 12 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 35 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 440,000× the energy of this one
- Magna, Utah 2020 M 5.7 310,000× the energy of this one
- Around the size people start to feel M 3.0 28× the energy of this one
- This earthquake M 2.0 about 35 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 6.0 The 2014 South Napa, California Earthquake · 20 km SW of this epicentre
- 5.4 South of Elmira, California · 25 km ESE 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 38.3615, -122.1742. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Napa County, CA | 21 km (13 mi) | NW | earthquakes near Napa County |
| Solano County, CA | 23 km (14 mi) | ESE | earthquakes near Solano County |
| Yolo County, CA | 43 km (26 mi) | NNE | earthquakes near Yolo County |
| Contra Costa County, CA | 53 km (33 mi) | SSE | earthquakes near Contra Costa County |
| Marin County, CA | 61 km (38 mi) | SW | earthquakes near Marin County |
| Sonoma County, CA | 68 km (42 mi) | WNW | earthquakes near Sonoma County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
38 earthquakes have been recorded within 50 km since this one.
- 2.2 3km WSW of American Canyon, CA
- 1.9 2km NNW of Crockett, CA
- 1.7 7km N of Kenwood, CA
- 2.4 11km NNE of Napa, CA
- 2.1 2km WNW of Vallejo, CA
- 2.7 12km NNE of Napa, CA
- 1.6 8km NNW of Bay Point, CA
- 1.6 14km E of Angwin, CA
- 1.5 8km NNW of Bay Point, CA
- 2.1 10km NW of Rio Vista, CA
- 1.7 14km E of Angwin, CA
- 1.9 2km NW of Crockett, CA
- 2.1 6km SSW of Yountville, CA
- 1.9 4km SE of Rodeo, CA
- 3.2 4km SSW 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.