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United States · California

M1.7 Earthquake near Petrolia, California (United States)

UTC time: 2026-08-25 23:11:48 UTC Local time: —

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About this earthquake

On August 25, 2026 at 23:11 UTC, a magnitude M1.7 earthquake occurred near Petrolia, California (United States). With a focal depth of about 33 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 185 earthquakes, the strongest at M3.0.

Details

ID
ae1364dec30889c764ab0a7290f4d0f359ea621d
Magnitude
M1.7
Depth
33.1 km
UTC time
2026-08-25 23:11:48 UTC
Local time
—
Country
United States
State
California
City
Petrolia
County
Humboldt County
Village
Petrolia
Source
usgs
Coordinates
40.32067, -124.26800
Temperature
13.8°C

Depth profile

Depth profile Depth: 33.1 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 33.1 km
Shallow
33.1 km
33.1 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: 197 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Shasta
    Distance: 212 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Lassen Volcanic Center
    Distance: 234 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Medicine Lake
    Distance: 269 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Escanaba Segment
    Distance: 282 km ·Fissure vent(s) ·Elevation: -1'700 m ·Last eruption: -2260 ·United States
  • Jackson Segment
    Distance: 309 km ·Fissure vent(s) ·Elevation: -3'100 m ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Nuclear power plants

  • Humboldt Bay nuclear power plantUnited StatesPermanently shut downReactor units at site: 1
    47.0 kmStraight-line distance

Source: Global Energy Monitor · Global Nuclear Power Tracker · Dataset date: 2026-08

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

California

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 2.0 · 2,447 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

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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