California earthquakes

M3.7 earthquake 36 km E of Hydesville, CA

A magnitude 3.7 earthquake struck 36 km E of Hydesville, CA on Mon, Sep 7, 2026, 2:44 PM PDT (21:44 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M3.8 20 km WSW of Petrolia, CA. This one was a foreshock.

Hydesville forecast More in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.7 (mw), minor
Local time: Mon, Sep 7, 2026, 2:44 PM PDT
UTC: 2026-09-07 21:44:24 UTC
Depth: 24.3 km (15.1 mi), shallow
Epicenter: 40.563° N, 123.678° W
Region: California
Felt reports: 15
Strongest shaking: III, weak shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: III, weak shaking
Peak ground acceleration: 0.3% of gravity
Peak ground velocity: 0.1 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

15 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking. If you felt it, tell the USGS: every report sharpens the shaking map.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Moment magnitude: 3.7 Mw

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.2 km horizontally, 0.6 km in depth
Depth from: From location
Station coverage gap: 20°
Stations used: 66

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 27 since this one and 43 in the 30 days before it.

After

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc75431397 (also filed as us7000tez0). Read Tue, Sep 22, 2026, 10:23 PM UTC.