M1.8 Depth: 19.8 km

M1.8 Earthquake near 16 km WSW of Petrolia, CA (United States)

UTC time: 2025-05-28 18:17:46 UTC Local time: —

About this earthquake

A magnitude M1.8 earthquake was recorded near 16 km WSW of Petrolia, CA (United States) on May 28, 2025 at 18:17 UTC. With a focal depth of about 20 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 154 earthquakes were recorded in the past 24 hours, the strongest reaching M3.3.

Details

Magnitude

M1.8

Depth

19.8 km

UTC time

2025-05-28 18:17:46 UTC

Local time

—

Country

United States

Source

usgs

Coordinates

40.26400, -124.45267

Temperature

11.1°C

Map

Depth profile

Shallow

19.8 km

19.8 km — deeper than the regional average (15.2 km)

Regional average: 15.2 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: 204 km ·Volcanic field ·Elevation: 1'439 m ·United States
Shasta

Distance: 229 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
Lassen Volcanic Center

Distance: 251 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
Escanaba Segment

Distance: 269 km ·Fissure vent(s) ·Elevation: -1'700 m ·Last eruption: -2260 ·United States
Medicine Lake

Distance: 286 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
Jackson Segment

Distance: 302 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)

512

Country (24h)