M2.8 Depth: 21.6 km

M2.8 Earthquake near 18 km WSW of Petrolia, CA (United States)

UTC time: 2026-05-27 09:23:57 UTC Local time: —

About this earthquake

A magnitude M2.8 earthquake was recorded near 18 km WSW of Petrolia, CA (United States) on May 27, 2026 at 09:23 UTC. The hypocenter lay relatively close to the surface at around 22 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 156 earthquakes were recorded in the past 24 hours, the strongest reaching M3.6.

Details

Magnitude

M2.8

Depth

21.6 km

UTC time

2026-05-27 09:23:57 UTC

Local time

—

Country

United States

Source

usgs

Coordinates

40.26783, -124.48333

Temperature

10.7°C

Map

Depth profile

Shallow

21.6 km

21.6 km — deeper than the regional average (15.9 km)

Regional average: 15.9 km

Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Volcanoes nearby

Clear Lake Volcanic Field

Distance: 206 km ·Volcanic field ·Elevation: 1'439 m ·United States
Shasta

Distance: 231 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
Lassen Volcanic Center

Distance: 253 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
Escanaba Segment

Distance: 267 km ·Fissure vent(s) ·Elevation: -1'700 m ·Last eruption: -2260 ·United States
Medicine Lake

Distance: 288 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
Jackson Segment

Distance: 300 km ·Fissure vent(s) ·Elevation: -3'100 m ·United States

Historic earthquake map · United States

Open history map

Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

Country overview

View earthquake KPIs, strongest and latest events, and averages for this country.

Stats (last 24h)

Global (24h)

656

Country (24h)