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USGSSeptember 3, 2026

M2.8 earthquake, 15 km SE of Petrolia, CA

A magnitude 2.8 earthquake was recorded 15 km SE of Petrolia, CA at a depth of 11 km, according to the U.S. Geological Survey. It was the 8,508th earthquake of magnitude 2.5 or more the USGS located in and near the U.S. in 2026, against 12,608 a year on average in 2016-2025.

M2.8

The notice

Issued by
U.S. Geological Survey
Area
15 km SE of Petrolia, CA
State
California
Magnitude
2.8 (duration magnitude)
Depth
11.3 km
Time
2026-09-03 16:54:30 UTC
Status
automatic solution (may be revised)
Epicentre
40.224, -124.175
Official source
U.S. Geological Survey: the notice at its source

Source: U.S. Geological Survey: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.