Earthquake · automatic estimate, may change
M 2.5md
Earthquake near Patterson, CA
No earthquake was likely felt in Patterson in the 24 hours to 4:00 am PST (12:00 UTC). The last one was M 2.9, 29 km (18 mi) W, at 9:44 am PDT on 31 October 2026, estimated intensity II (weak) in town. Every earthquake near Patterson
This page: a magnitude 2.5 earthquake was recorded 14 km (9 mi) west-southwest of Patterson, CA, at 1:44 am PDT on 14 October 2025 (08:44 UTC), 3.6 km deep. 5 people have reported feeling it to USGS. The magnitude and location are an automatic first estimate and may change.
USGS: 14 km WSW of Patterson, CA
49 km (31 mi) ENE of San Jose, CA · 34 km (21 mi) SW of Modesto, CA
- When
- 1:44 am PDT on 14 October 2025 ()
- Where
- 14 km (9 mi) west-southwest of Patterson, CA · earthquakes near Patterson
- Magnitude
- M 2.5 (md)
- Depth
- 3.6 km below the surface
- Felt
- 5 reports · strongest reported intensity IV
- Nearest
- Stanislaus County, 29 km ENE
- Nearest mapped fault
- Great Valley thrust fault system, 9 km from its surface trace — near is not the same as on
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 315 days ago
Earthquake alerts for Patterson, CA
Get a notification in this browser when USGS records an earthquake near Patterson, 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 22 km (14 mi) from the epicentre. In Patterson, 14 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: Patterson 14 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 80,000× the energy of this one
- Magna, Utah 2020 M 5.7 57,000× the energy of this one
- Around the size people start to feel M 3.0 5.1× the energy of this one
- This earthquake M 2.5 about 190 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 5.1 on 2022-10-25 — about 6,200 times the energy of this one.
Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:
- 6.5 Near Morgan Hill, California · 47 km SW of this epicentre
- 6.2 Near San Jose, California · 48 km WSW of this epicentre
- 6.2 The 1984 Morgan Hill, California Earthquake · 38 km WSW of this epicentre
- 5.8 The 1979 Coyote Lake, California Earthquake · 42 km SSW of this epicentre
- 5.7 15 km NE of East Foothills, California · 36 km W 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 37.4298, -121.2808. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Stanislaus County, CA | 29 km (18 mi) | ENE | earthquakes near Stanislaus County |
| Santa Clara County, CA | 43 km (27 mi) | WSW | earthquakes near Santa Clara County |
| Merced County, CA | 56 km (35 mi) | ESE | earthquakes near Merced County |
| San Joaquin County, CA | 56 km (35 mi) | N | earthquakes near San Joaquin County |
| Alameda County, CA | 61 km (38 mi) | WNW | earthquakes near Alameda County |
| Santa Cruz County, CA | 79 km (49 mi) | SW | earthquakes near Santa Cruz County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
47 earthquakes have been recorded within 50 km since this one.
- 1.6 20 km WSW of Patterson, CA
- 2.2 9 km E of Alum Rock, CA
- 1.8 9 km E of Alum Rock, CA
- 1.9 9 km E of Alum Rock, CA
- 2.7 2 km ESE of San Martin, CA
- 1.7 12 km ESE of Livermore, CA
- 2.3 5 km NNE of Alum Rock, CA
- 2.1 8 km NE of Alum Rock, CA
- 1.9 28 km WSW of Westley, CA
- 2.0 8 km ENE of Gilroy, CA
- 2.4 23 km ENE of Alum Rock, CA
- 1.9 9 km E of Alum Rock, CA
- 1.7 7 km SSW of Livermore, CA
- 1.8 23 km ENE of Alum Rock, CA
- 3.0 23 km ENE of Alum Rock, 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.