Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Crockett, CA
No earthquake was likely felt in Crockett in the 24 hours to 3:00 am PST (11:00 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 1.6 earthquake was recorded in Crockett, CA, at 3:50 pm PDT on 14 June 2020 (22:50 UTC), 7.0 km deep.
USGS: 2km NNW of Crockett, CA
6 km (4 mi) SE of Vallejo, CA · 36 km (23 mi) NNE of San Francisco, CA
- When
- 3:50 pm PDT on 14 June 2020 ()
- Where
- in Crockett, CA · earthquakes near Crockett
- Magnitude
- M 1.6 (md)
- Depth
- 7.0 km below the surface
- Felt
- no reports yet
- Nearest
- Contra Costa County, 29 km SE
- Nearest mapped fault
- Green Valley fault, 11 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 2340 days ago
Earthquake alerts for Crockett, 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 9 km (6 mi) from the epicentre. 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 in town, intensity II · Vallejo 5 km, intensity II · Benicia 6 km, intensity II · Hercules 8 km, intensity II · Martinez 9 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
- Around the size people start to feel M 3.0 120× the energy of this one
- This earthquake M 1.6 about 8.1 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 4.5 on 2019-10-15 — about 18,000 times the energy of this one.
Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:
- 7.9 The 1906 San Francisco, California Earthquake · 46 km SW of this epicentre
- 6.0 The 2014 South Napa, California Earthquake · 18 km NNW of this epicentre
- 5.8 The 1980 Livermore, California Earthquake · 47 km ESE of this epicentre
- 5.4 South of Elmira, California · 38 km NE of this epicentre
- 5.1 11 km E of Blackhawk, California · 48 km SE 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 38.0665, -122.2202. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Contra Costa County, CA | 29 km (18 mi) | SE | earthquakes near Contra Costa County |
| Solano County, CA | 33 km (21 mi) | NE | earthquakes near Solano County |
| Marin County, CA | 46 km (29 mi) | W | earthquakes near Marin County |
| Napa County, CA | 50 km (31 mi) | N | earthquakes near Napa County |
| Alameda County, CA | 54 km (33 mi) | SSE | earthquakes near Alameda County |
| Yolo County, CA | 74 km (46 mi) | NNE | earthquakes near Yolo County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
46 earthquakes have been recorded within 50 km since this one.
- 1.5 5km N of Dublin, CA
- 1.7 6km SW of Yountville, CA
- 2.1 6km SSW of Yountville, CA
- 1.6 6km ESE of Santa Venetia, CA
- 1.8 5km NNE of Black Point-Green Point, CA
- 1.5 4km SSE of Brentwood, CA
- 1.7 2km SW of Clayton, CA
- 1.7 6km W of Brentwood, CA
- 2.3 3km ENE of San Ramon, CA
- 2.5 2km ENE of San Leandro, CA
- 2.6 2km ENE of Pleasant Hill, CA
- 2.3 6km W of Glen Ellen, CA
- 2.4 2km E of Berkeley, CA
- 2.6 4km ESE of Berkeley, CA
- 2.1 4km ESE of Berkeley, 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.