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M1.8 Depth: 18.3 km

M1.8 Earthquake near 15 km WSW of Petrolia, CA (United States)

UTC time: 2025-12-06 23:12:22 UTC Local time: —

About this earthquake

On December 6, 2025 at 23:12 UTC, a magnitude M1.8 earthquake occurred near 15 km WSW of Petrolia, CA (United States). The hypocenter lay relatively close to the surface at around 18 km, increasing how strongly it was felt. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 233 earthquakes, the strongest at M5.1.

Details

Magnitude
M1.8
Depth
18.3 km
UTC time
2025-12-06 23:12:22 UTC
Local time
—
Country
United States
Source
usgs
Coordinates
40.29250, -124.45700
Temperature
11.9°C

Map

Depth profile

Depth profile Depth: 18.3 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 18.3 km
Shallow
18.3 km
18.3 km — close to the regional average (15.6 km)
Regional average: 15.6 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: 227 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: 268 km ·Fissure vent(s) ·Elevation: -1'700 m ·Last eruption: -2260 ·United States
  • Medicine Lake
    Distance: 284 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Jackson Segment
    Distance: 299 km ·Fissure vent(s) ·Elevation: -3'100 m ·United States

Historic earthquake map · United States

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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.

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