Earthquake · reviewed by a seismologist
M 2.9ml
Earthquake near Pittsburg, CA
No earthquake was likely felt in Pittsburg in the 24 hours to 1:21 pm PST (21:21 UTC). The last one was M 2.5, 15 km (9 mi) WSW, at 1:23 am PST on 2 November 2026, estimated intensity II (weak) in town; 39 felt reports to USGS. Every earthquake near Pittsburg
This page: a magnitude 2.9 earthquake was recorded 13 km (8 mi) north-northeast of Pittsburg, CA, at 8:37 am PDT on 4 April 2025 (15:37 UTC), 27 km deep. 33 people have reported feeling it to USGS.
USGS: 13 km NNE of Pittsburg, CA
14 km (9 mi) NNE of Pittsburg, CA · 64 km (40 mi) NE of San Francisco, CA
- When
- 8:37 am PDT on 4 April 2025 ()
- Where
- 13 km (8 mi) north-northeast of Pittsburg, CA · earthquakes near Pittsburg
- Magnitude
- M 2.9 (ml)
- Depth
- 27 km below the surface
- Felt
- 33 reports · strongest reported intensity III
- Nearest
- Solano County, 16 km NNW
- Nearest mapped fault
- Great Valley thrust fault system, 19 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 521 days ago
Earthquake alerts for Pittsburg, CA
Get a notification in this browser when USGS records an earthquake near Pittsburg, 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 19 km (12 mi) from the epicentre. In Pittsburg, 13 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: Pittsburg 13 km, intensity II · Rio Vista 14 km, intensity II · Antioch 15 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 720 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 21,000× the energy of this one
- Magna, Utah 2020 M 5.7 15,000× the energy of this one
- Around the size people start to feel M 3.0 1.3× the energy of this one
- This earthquake M 2.9 about 720 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 200 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 · 42 km WNW of this epicentre
- 5.8 The 1980 Livermore, California Earthquake · 34 km SSE of this epicentre
- 5.4 South of Elmira, California · 19 km NNW of this epicentre
- 5.4 9 km NE of Livermore, California · 45 km SSE of this epicentre
- 5.1 11 km E of Blackhawk, California · 37 km S 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 38.1385, -121.8472. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Solano County, CA | 16 km (10 mi) | NNW | earthquakes near Solano County |
| Contra Costa County, CA | 26 km (16 mi) | SSW | earthquakes near Contra Costa County |
| Alameda County, CA | 55 km (34 mi) | S | earthquakes near Alameda County |
| San Joaquin County, CA | 55 km (34 mi) | ESE | earthquakes near San Joaquin County |
| Sacramento County, CA | 56 km (35 mi) | NE | earthquakes near Sacramento County |
| Napa County, CA | 59 km (36 mi) | NW | earthquakes near Napa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
54 earthquakes have been recorded within 50 km since this one.
- 1.9 5 km WNW of Dublin, CA
- 1.7 3 km NNE of Dublin, CA
- 1.8 7 km E of Vallejo, CA
- 1.5 3 km SW of Clayton, CA
- 1.9 3 km ESE of Walnut Creek, CA
- 1.9 6 km SE of Moraga, CA
- 2.2 13 km SE of Suisun City, CA
- 2.7 6 km ESE of Clayton, CA
- 1.6 5 km E of Vallejo, CA
- 2.0 3 km WSW of Country Club, CA
- 2.1 4 km SE of Rodeo, CA
- 1.6 3 km SE of Rodeo, CA
- 3.2 2 km NW of Pinole, CA
- 1.5 3 km WSW of San Ramon, CA
- 1.7 2 km SSE of Danville, 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.