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United States · California

M3.4 Earthquake near Trinity County, California (United States)

UTC time: 2026-08-08 15:33:22 UTC Local time: —

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About this earthquake

On August 8, 2026 at 15:33 UTC, a magnitude M3.4 earthquake occurred near Trinity County, California (United States). 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 event was recorded by USGS. United States: 202 earthquakes were recorded in the past 24 hours, the strongest reaching M3.9.

Details

ID
214a2eac98be4236dcc1b10814aad1c5294209f4
Magnitude
M3.4
Depth
8.5 km
UTC time
2026-08-08 15:33:22 UTC
Local time
—
Country
United States
State
California
City
Trinity County
County
Trinity County
Source
usgs
Coordinates
40.02767, -123.44267
Temperature
22.7°C

Depth profile

Depth profile Depth: 8.5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 8.5 km
Shallow
8.5 km
8.5 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: 131 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Lassen Volcanic Center
    Distance: 172 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Shasta
    Distance: 186 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Medicine Lake
    Distance: 237 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Crater Lake
    Distance: 343 km ·Caldera ·Elevation: 2'487 m ·Last eruption: -2850 ·United States
  • Escanaba Segment
    Distance: 359 km ·Fissure vent(s) ·Elevation: -1'700 m ·Last eruption: -2260 ·United States

California

Context for this earthquake

24 Sep 2025 – 24 Sep 2026 · M ≥ 3.0 · 240 Catalogue entries

Of 239 other entries for this area and period, 115 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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