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United States · California

M4.2 Earthquake near San Ramon, California (United States)

UTC time: 2026-02-02 15:01:13 UTC Local time: —

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About this earthquake

On February 2, 2026 at 15:01 UTC, a magnitude M4.2 earthquake occurred near San Ramon, California (United States). With a focal depth of about 9 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this magnitude are clearly felt; minor damage to vulnerable buildings is possible.

The event was recorded by SCEDC. United States: 157 earthquakes were recorded in the past 24 hours, the strongest reaching M5.0.

Details

ID
311bfc8cbd75da215dacd4560a5fa61345ae0569
Magnitude
M4.2
Depth
9.4 km
UTC time
2026-02-02 15:01:13 UTC
Local time
—
Country
United States
State
California
City
San Ramon
County
Contra Costa County
Source
scedc
Coordinates
37.76000, -121.93700
Temperature
12.6°C

Depth profile

Depth profile Depth: 9.4 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 9.4 km
Shallow
9.4 km
9.4 km — shallower than the regional average (15.3 km)
Regional average: 15.3 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: 153 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Mono-Inyo Craters
    Distance: 256 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mammoth Mountain
    Distance: 256 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono Lake Volcanic Field
    Distance: 257 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Lassen Volcanic Center
    Distance: 306 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Soda Lakes
    Distance: 330 km ·Maar(s) ·Elevation: 1'251 m ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Oakland San Francisco Bay AirportUnited States · OAK · KOAK
    25.4 kmStraight-line distance
  • Buchanan FieldUnited States · CCR · KCCR
    27.6 kmStraight-line distance
  • San Carlos AirportUnited States · SQL · KSQL
    39.0 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-05

Nuclear power plants

  • Vallecitos nuclear power plantUnited StatesPermanently shut downReactor units at site: 1
    18.8 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 ≥ 3.0 · 239 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

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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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