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United States · California

M3.4 Earthquake near San Ramon, California (United States)

UTC time: 2026-01-30 18:33:10 UTC Local time: —

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About this earthquake

On January 30, 2026 at 18:33 UTC, a magnitude M3.4 earthquake occurred near San Ramon, California (United States). The hypocenter lay relatively close to the surface at around 6 km, increasing how strongly it was felt. Shaking of this size is frequently noticed but usually harmless.

The data is provided by ISC and cross-checked across seismological networks. United States: 157 earthquakes were recorded in the past 24 hours, the strongest reaching M3.3.

Details

ID
2e41545279c7cee1840049a1acb00623506c42e0
Magnitude
M3.4
Depth
6.0 km
UTC time
2026-01-30 18:33:10 UTC
Local time
—
Country
United States
State
California
City
San Ramon
County
Contra Costa County
Source
isc
Coordinates
37.75000, -121.93900
Temperature
12.1°C

Depth profile

Depth profile Depth: 6 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 6 km
Shallow
6 km
6 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: 154 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: 307 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Soda Lakes
    Distance: 331 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
    25.0 kmStraight-line distance
  • Buchanan FieldUnited States · CCR · KCCR
    28.6 kmStraight-line distance
  • San Carlos AirportUnited States · SQL · KSQL
    38.1 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-11-05

Nuclear power plants

  • Vallecitos nuclear power plantUnited StatesPermanently shut downReactor units at site: 1
    17.9 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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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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