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M1.5 Depth: 15.0 km

M1.5 Earthquake near Concord, California (United States)

UTC time: 2026-08-04 21:46:44 UTC Local time: —

About this earthquake

On August 4, 2026 at 21:46 UTC, a magnitude M1.5 earthquake occurred near Concord, California (United States). With a focal depth of about 15 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: 166 earthquakes were recorded in the past 24 hours, the strongest reaching M3.7.

Map

Depth profile

Depth profile Depth: 15 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 15 km
Shallow
15 km
15 km — close to the regional average (15.5 km)
Regional average: 15.5 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: 128 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Mono Lake Volcanic Field
    Distance: 264 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Mono-Inyo Craters
    Distance: 265 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mammoth Mountain
    Distance: 267 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Lassen Volcanic Center
    Distance: 284 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Soda Lakes
    Distance: 325 km ·Maar(s) ·Elevation: 1'251 m ·United States

Historic earthquake map · United States

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Country statistics · United States

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

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