Back to map
M1.1 Depth: 3.4 km

M1.1 Earthquake near Sonoma County, California (United States)

UTC time: 2026-08-04 03:39:01 UTC Local time: —

About this earthquake

A magnitude M1.1 earthquake was recorded near Sonoma County, California (United States) on August 4, 2026 at 03:39 UTC. The hypocenter lay relatively close to the surface at around 3 km, increasing how strongly it was felt. 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 163 earthquakes, the strongest at M3.1.

Map

Depth profile

Depth profile Depth: 3.4 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 3.4 km
Shallow
3.4 km
3.4 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: 22 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Lassen Volcanic Center
    Distance: 221 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Shasta
    Distance: 298 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Medicine Lake
    Distance: 333 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Mono Lake Volcanic Field
    Distance: 339 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Mono-Inyo Craters
    Distance: 346 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States

Historic earthquake map · United States

Open history map
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.

Share