Earthquake · reviewed by a seismologist
M 1.5md
Earthquake near Crockett, CA
No earthquake was likely felt in Crockett in the 24 hours to 3:44 am PST (11:44 UTC). The last one was M 1.8, 10 km (6 mi) NNE, at 11:09 am PST on 4 November 2026, estimated intensity II (weak) in town. Every earthquake near Crockett
This page: a magnitude 1.5 earthquake was recorded 3 km (2 mi) south of Crockett, CA, at 6:53 pm PST on 30 January 2019 (02:53 UTC), 7.4 km deep.
USGS: 3km S of Crockett, CA
10 km (6 mi) SSE of Vallejo, CA · 33 km (20 mi) NE of San Francisco, CA
- When
- 6:53 pm PST on 30 January 2019 ()
- Where
- 3 km (2 mi) south of Crockett, CA · earthquakes near Crockett
- Magnitude
- M 1.5 (md)
- Depth
- 7.4 km below the surface
- Felt
- no reports yet
- Nearest
- Contra Costa County, 25 km ESE
- Nearest mapped fault
- Concord fault, 12 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 2833 days ago
Earthquake alerts for Crockett, CA
Get a notification in this browser when USGS records an earthquake near Crockett, 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 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 7 km (4 mi) from the epicentre. In Crockett, 3 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: Crockett 3 km, intensity II · Benicia 5 km, intensity II · Martinez 7 km, intensity II · Hercules 7 km, intensity II. Estimated for each town centre; each link is that town's own record.
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 2018-01-04 — about 21,000 times the energy of this one.
Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:
- 7.9 The 1906 San Francisco, California Earthquake · 43 km SW of this epicentre
- 6.0 The 2014 South Napa, California Earthquake · 23 km NNW of this epicentre
- 5.8 The 1980 Livermore, California Earthquake · 44 km ESE of this epicentre
- 5.4 South of Elmira, California · 41 km NE of this epicentre
- 5.3 The 1957 San Francisco, California Earthquake · 46 km SSW 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 38.0242, -122.2092. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Contra Costa County, CA | 25 km (16 mi) | ESE | earthquakes near Contra Costa County |
| Solano County, CA | 36 km (22 mi) | NE | earthquakes near Solano County |
| Marin County, CA | 47 km (29 mi) | W | earthquakes near Marin County |
| Alameda County, CA | 49 km (31 mi) | SSE | earthquakes near Alameda County |
| Napa County, CA | 55 km (34 mi) | N | earthquakes near Napa County |
| San Mateo County, CA | 69 km (43 mi) | SSW | earthquakes near San Mateo County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 2.1 6km SSW of Yountville, CA
- 1.6 2km S of Alamo, CA
- 2.2 3km ESE of Berkeley, CA
- 1.9 4km SE of Rodeo, CA
- 1.7 1km N of East Richmond Heights, CA
- 2.0 5km N of San Leandro, CA
- 1.8 3km S of Alamo, CA
- 1.7 4km ESE of American Canyon, CA
- 3.4 2km NE of Pacheco, CA
- 1.5 2km W of Crockett, CA
- 2.0 5km WSW of Yountville, CA
- 1.9 4km NE of Vallejo, CA
- 2.0 6km WSW of Colma, CA
- 1.5 3km ESE of Rodeo, CA
- 1.5 12km E of Blackhawk, 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.