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United States · California

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

UTC time: 2026-09-18 18:24:15 UTC Local time: —

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About this earthquake

On September 18, 2026 at 18:24 UTC, a magnitude M1.1 earthquake occurred near Sonoma County, California (United States). With a focal depth of about 3 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The event was recorded by USGS. United States: 186 earthquakes were recorded in the past 24 hours, the strongest reaching M4.8.

Details

ID
05b25d05eddc0ae6aa1c921e808934c514b8d7de
Magnitude
M1.1
Depth
3.4 km
UTC time
2026-09-18 18:24:15 UTC
Local time
—
Country
United States
State
California
City
Sonoma County
County
Sonoma County
Source
usgs
Coordinates
38.79984, -122.81167
Temperature
21.3°C

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 (15.2 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: 19 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Lassen Volcanic Center
    Distance: 219 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Shasta
    Distance: 295 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Medicine Lake
    Distance: 330 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Mono Lake Volcanic Field
    Distance: 341 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Mono-Inyo Craters
    Distance: 348 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Charles M. Schulz Sonoma County AirportUnited States · STS · KSTS
    32.3 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-18

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

California

Context for this earthquake

18 Sep 2025 – 18 Sep 2026 · M ≥ 2.0 · 2,413 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

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.

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