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United States · California

M1.8 Earthquake near Sonoma County, California (United States)

UTC time: 2026-09-18 02:12:09 UTC Local time: —

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About this earthquake

A magnitude M1.8 earthquake was recorded near Sonoma County, California (United States) on September 18, 2026 at 02:12 UTC. With a focal depth of about 8 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: over the past 24 hours, QuakeMap24 logged 146 earthquakes, the strongest at M6.5.

Details

ID
cffd17f8944bdc29f4b023d6ef3b2cde1324ea9d
Magnitude
M1.8
Depth
7.7 km
UTC time
2026-09-18 02:12:09 UTC
Local time
—
Country
United States
State
California
City
Sonoma County
County
Sonoma County
Source
usgs
Coordinates
38.49450, -122.55566
Temperature
19.4°C

Depth profile

Depth profile Depth: 7.7 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 7.7 km
Shallow
7.7 km
7.7 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: 56 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Lassen Volcanic Center
    Distance: 240 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Mono Lake Volcanic Field
    Distance: 313 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Mono-Inyo Craters
    Distance: 318 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mammoth Mountain
    Distance: 323 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Shasta
    Distance: 326 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Charles M. Schulz Sonoma County AirportUnited States · STS · KSTS
    22.5 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 · 2,412 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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