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United States · California

M1.3 Earthquake near Diablo, California (United States)

UTC time: 2026-10-31 14:20:38 UTC Local time: —

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About this earthquake

A magnitude M1.3 earthquake was recorded near Diablo, California (United States) on October 31, 2026 at 14:20 UTC. With a focal depth of about 17 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: 195 earthquakes were recorded in the past 24 hours, the strongest reaching M4.3.

Details

ID
7c9c1a08c901ca88905fe77f11c5383001f628c8
Magnitude
M1.3
Depth
17.1 km
UTC time
2026-10-31 14:20:38 UTC
Local time
—
Country
United States
State
California
City
Diablo
County
Contra Costa County
Village
Diablo
Source
usgs
Coordinates
37.83900, -121.95300
Temperature
9.7°C

Depth profile

Depth profile Depth: 17.1 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 17.1 km
Shallow
17.1 km
17.1 km — close to 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: 145 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Mono-Inyo Craters
    Distance: 257 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mono Lake Volcanic Field
    Distance: 257 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Mammoth Mountain
    Distance: 258 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: 326 km ·Maar(s) ·Elevation: 1'251 m ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Buchanan FieldUnited States · CCR · KCCR
    19.1 kmStraight-line distance
  • Oakland San Francisco Bay AirportUnited States · OAK · KOAK
    27.0 kmStraight-line distance
  • San Francisco International AirportUnited States · SFO · KSFO
    44.4 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-31

Nuclear power plants

  • Vallecitos nuclear power plantUnited StatesPermanently shut downReactor units at site: 1
    27.3 kmStraight-line distance

Source: Global Energy Monitor · Global Nuclear Power Tracker · Dataset date: 2026-08

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

05 Oct 2025 – 05 Oct 2026 · M ≥ 2.0 · 2,447 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

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