Earthquake · reviewed by a seismologist
M 1.9md
Earthquake near Walnut Creek, CA
No earthquake was likely felt in Walnut Creek in the 24 hours to 4:44 am PST (12:44 UTC). The last one was M 2.1, 4 km (2 mi) N, at 4:05 am PST on 8 November 2026, estimated intensity II (weak) in town; 3 felt reports to USGS. Every earthquake near Walnut Creek
This page: a magnitude 1.9 earthquake was recorded 5 km (3 mi) east-southeast of Walnut Creek, CA, at 7:25 pm PST on 26 December 2025 (03:25 UTC), 10 km deep. 1 person has reported feeling it to USGS.
USGS: 5 km ESE of Walnut Creek, CA
in Walnut Creek, CA · 38 km (24 mi) ENE of San Francisco, CA
- When
- 7:25 pm PST on 26 December 2025 ()
- Where
- 5 km (3 mi) east-southeast of Walnut Creek, CA · earthquakes near Walnut Creek
- Magnitude
- M 1.9 (md)
- Depth
- 10 km below the surface
- Felt
- 1 report · strongest reported intensity III
- Nearest
- Contra Costa County, 6 km ENE
- Nearest mapped fault
- Calaveras fault, 7 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 158 days ago
Earthquake alerts for Walnut Creek, 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 10 km (6 mi) from the epicentre. In Walnut Creek, 5 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: Walnut Creek 5 km, intensity II · Alamo 5 km, intensity II · Pleasant Hill 7 km, intensity II · Danville 8 km, intensity II · Concord 9 km, intensity II · Lafayette 10 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
- Magna, Utah 2020 M 5.7 600,000× the energy of this one
- Around the size people start to feel M 3.0 53× the energy of this one
- This earthquake M 1.9 about 18 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 8,200 times the energy of this one.
Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:
- 6.0 The 2014 South Napa, California Earthquake · 44 km NW of this epicentre
- 5.8 The 1980 Livermore, California Earthquake · 22 km ESE of this epicentre
- 5.4 South of Elmira, California · 46 km NNE of this epicentre
- 5.4 9 km NE of Livermore, California · 31 km ESE of this epicentre
- 5.3 The 1957 San Francisco, California Earthquake · 49 km WSW 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 37.8945, -122.0090. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Contra Costa County, CA | 6 km (4 mi) | ENE | earthquakes near Contra Costa County |
| Alameda County, CA | 29 km (18 mi) | SSE | earthquakes near Alameda County |
| Solano County, CA | 42 km (26 mi) | N | earthquakes near Solano County |
| San Mateo County, CA | 62 km (39 mi) | SSW | earthquakes near San Mateo County |
| San Joaquin County, CA | 65 km (40 mi) | E | earthquakes near San Joaquin County |
| Marin County, CA | 67 km (42 mi) | WNW | earthquakes near Marin County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
48 earthquakes have been recorded within 50 km since this one.
- 1.6 3 km ESE of San Ramon, CA
- 1.6 1 km WSW of Pittsburg, CA
- 1.7 3 km NE of Oakland, CA
- 1.7 7 km SSW of Livermore, CA
- 3.0 15 km N of Pittsburg, CA
- 1.6 14 km N of Pittsburg, CA
- 1.9 4 km SE of San Ramon, CA
- 1.6 2 km ESE of Berkeley, CA
- 1.5 2 km E of Berkeley, CA
- 1.5 11 km SE of Livermore, CA
- 1.6 11 km SE of Livermore, CA
- 1.6 13 km SE of Livermore, CA
- 1.7 11 km SE of Livermore, CA
- 1.7 7 km E of Clayton, CA
- 2.5 7 km SW of Antioch, 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.