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M1.0 Depth: 7.5 km

M1.0 Earthquake near Walnut Creek, California (United States)

UTC time: 2026-08-04 00:28:24 UTC Local time: —

About this earthquake

On August 4, 2026 at 00:28 UTC, a magnitude M1.0 earthquake occurred near Walnut Creek, California (United States). With a focal depth of about 7 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 171 earthquakes were recorded in the past 24 hours, the strongest reaching M3.1.

Map

Depth profile

Depth profile Depth: 7.5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 7.5 km
Shallow
7.5 km
7.5 km — shallower than 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: 139 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Mono-Inyo Craters
    Distance: 265 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mono Lake Volcanic Field
    Distance: 265 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Mammoth Mountain
    Distance: 266 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Lassen Volcanic Center
    Distance: 297 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Soda Lakes
    Distance: 332 km ·Maar(s) ·Elevation: 1'251 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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