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United States · California

M3.9 Earthquake near Mendocino County, California (United States)

UTC time: 2026-09-26 03:42:49 UTC Local time: —

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About this earthquake

A magnitude M3.9 earthquake was recorded near Mendocino County, California (United States) on September 26, 2026 at 03:42 UTC. The hypocenter lay relatively close to the surface at around 9 km, increasing how strongly it was felt. Shaking of this size is frequently noticed but usually harmless.

The data is provided by USGS and cross-checked across seismological networks. United States: 156 earthquakes were recorded in the past 24 hours, the strongest reaching M3.9.

Details

ID
9688a0449edd12e0d72d967a75584b7e035131f1
Magnitude
M3.9
Depth
9.0 km
UTC time
2026-09-26 03:42:49 UTC
Local time
—
Country
United States
State
California
City
Mendocino County
County
Mendocino County
Source
usgs
Coordinates
39.00910, -123.47100
Temperature
12.1°C

Depth profile

Depth profile Depth: 9 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 9 km
Shallow
9 km
9 km — shallower 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: 61 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Lassen Volcanic Center
    Distance: 235 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Shasta
    Distance: 288 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Medicine Lake
    Distance: 332 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Soda Lakes
    Distance: 400 km ·Maar(s) ·Elevation: 1'251 m ·United States
  • Mono Lake Volcanic Field
    Distance: 402 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States

California

Context for this earthquake

26 Sep 2025 – 26 Sep 2026 · M ≥ 3.0 · 241 Catalogue entries

Of 240 other entries for this area and period, 44 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

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Historic earthquake map · United States

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