Earthquake · reviewed by a seismologist
M 4.1mw
Earthquake near Bay Point, CA
No earthquake was likely felt in Bay Point in the 24 hours to 2:44 am PST (10:44 UTC). The last one was M 2.1, 13 km (8 mi) SW, at 4:05 am PST on 8 November 2026, estimated intensity II (weak) in town; 3 felt reports to USGS. Every earthquake near Bay Point
This page: a magnitude 4.1 earthquake was recorded 7 km (4 mi) northwest of Bay Point, CA, at 5:07 am PDT on 2 June 2022 (12:07 UTC), 18 km deep. 5,794 people have reported feeling it to USGS.
USGS: 7km NW of Bay Point, CA
12 km (7 mi) N of Concord, CA · 49 km (30 mi) NE of San Francisco, CA
- When
- 5:07 am PDT on 2 June 2022 ()
- Where
- 7 km (4 mi) northwest of Bay Point, CA · earthquakes near Bay Point
- Magnitude
- M 4.1 (mw)
- Depth
- 18 km below the surface
- Felt
- 5,794 reports · strongest reported intensity IV
- Measured shaking
- intensity IV (ShakeMap)
- USGS impact alert
- green
- Tsunami
- USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
- Nearest
- Contra Costa County, 18 km SSE
- Nearest mapped fault
- Concord fault, 9 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 660 days ago
Earthquake alerts for Bay Point, CA
Get a notification in this browser when USGS records an earthquake near Bay Point, 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 light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.
At this magnitude and depth, people at rest would likely notice it out to about 106 km (66 mi) from the epicentre. In Bay Point, 7 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: Concord 11 km, intensity III · Pacheco 12 km, intensity III · Pittsburg 12 km, intensity III · Martinez 13 km, intensity III · Benicia 14 km, intensity III · Pleasant Hill 15 km, intensity III · Crockett 18 km, intensity III · Suisun 18 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 24 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 6,900× the energy of this one
- Mineral, Virginia 2011 M 5.8 310× the energy of this one
- Magna, Utah 2020 M 5.7 220× the energy of this one
- This earthquake M 4.1 about 24 tons of TNT
- Around the size people start to feel M 3.0 this one released 51× 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
The largest earthquake within 50 km since 2016 was M 4.5 on 2019-10-15 — about 3 times the energy of this one.
Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:
- 6.0 The 2014 South Napa, California Earthquake · 31 km WNW of this epicentre
- 5.8 The 1980 Livermore, California Earthquake · 34 km SE of this epicentre
- 5.4 South of Elmira, California · 27 km NNE of this epicentre
- 5.4 9 km NE of Livermore, California · 45 km SE of this epicentre
- 5.1 11 km E of Blackhawk, California · 36 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 38.0765, -122.0077. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Contra Costa County, CA | 18 km (11 mi) | SSE | earthquakes near Contra Costa County |
| Solano County, CA | 22 km (14 mi) | NNE | earthquakes near Solano County |
| Alameda County, CA | 48 km (30 mi) | S | earthquakes near Alameda County |
| Napa County, CA | 55 km (34 mi) | NNW | earthquakes near Napa County |
| Marin County, CA | 65 km (40 mi) | W | earthquakes near Marin County |
| San Joaquin County, CA | 66 km (41 mi) | ESE | earthquakes near San Joaquin County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 1.7 2km WNW of Concord, CA
- 2.1 2km NNE of San Leandro, CA
- 1.7 4km WNW of Dublin, CA
- 1.5 7km E of Santa Venetia, CA
- 1.9 8km WSW of Mountain House, CA
- 2.1 6km NW of Bay Point, CA
- 1.9 2km ENE of Berkeley, CA
- 1.6 6km SSW of Suisun City, CA
- 1.8 2km SE of Pacheco, CA
- 1.7 3km ESE of Berkeley, CA
- 2.0 3km ESE of Berkeley, CA
- 1.7 5km E of Vallejo, CA
- 2.4 3km ESE of Berkeley, CA
- 2.9 3km ESE of Berkeley, CA
- 2.7 4km E of Sonoma, 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.