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M1.9 Depth: 30.8 km

M1.9 Earthquake near 21 km ESE of Petrolia, CA (United States)

UTC time: 2025-09-17 13:40:14 UTC Local time: —

About this earthquake

A magnitude M1.9 earthquake was recorded near 21 km ESE of Petrolia, CA (United States) on September 17, 2025 at 13:40 UTC. With a focal depth of about 31 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. 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: 173 earthquakes were recorded in the past 24 hours, the strongest reaching M3.9.

Details

Magnitude
M1.9
Depth
30.8 km
UTC time
2025-09-17 13:40:14 UTC
Local time
—
Country
United States
City
California
Source
usgs
Coordinates
40.30250, -124.03700
Temperature
14.7°C

Map

Depth profile

Depth profile Depth: 30.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 30.8 km
Shallow
30.8 km
30.8 km — deeper than the regional average (15.4 km)
Regional average: 15.4 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: 184 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Shasta
    Distance: 198 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Lassen Volcanic Center
    Distance: 215 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Medicine Lake
    Distance: 254 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Escanaba Segment
    Distance: 302 km ·Fissure vent(s) ·Elevation: -1'700 m ·Last eruption: -2260 ·United States
  • Jackson Segment
    Distance: 325 km ·Fissure vent(s) ·Elevation: -3'100 m ·United States

Historic earthquake map · United States

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Country statistics · United States

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

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