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United States · California

M2.1 Earthquake near Alameda County, California (United States)

UTC time: 2026-09-10 22:00:38 UTC Local time: —

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About this earthquake

On September 10, 2026 at 22:00 UTC, a magnitude M2.1 earthquake occurred near Alameda County, California (United States). The hypocenter lay relatively close to the surface at around 10 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The data is provided by USGS and cross-checked across seismological networks. United States: 184 earthquakes were recorded in the past 24 hours, the strongest reaching M5.2.

Details

ID
b2dfa6437e798d4420829762fa57145c144b494b
Magnitude
M2.1
Depth
9.8 km
UTC time
2026-09-10 22:00:38 UTC
Local time
—
Country
United States
State
California
City
Alameda County
County
Alameda County
Source
usgs
Coordinates
37.70917, -121.96300
Temperature
31.5°C

Depth profile

Depth profile Depth: 9.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 9.8 km
Shallow
9.8 km
9.8 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: 157 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Mammoth Mountain
    Distance: 258 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono-Inyo Craters
    Distance: 258 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mono Lake Volcanic Field
    Distance: 260 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Lassen Volcanic Center
    Distance: 312 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Soda Lakes
    Distance: 336 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
    22.7 kmStraight-line distance
  • Buchanan FieldUnited States · CCR · KCCR
    32.3 kmStraight-line distance
  • San Carlos AirportUnited States · SQL · KSQL
    33.4 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-16

Nuclear power plants

  • Vallecitos nuclear power plantUnited StatesPermanently shut downReactor units at site: 1
    15.6 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

16 Sep 2025 – 16 Sep 2026 · M ≥ 2.0 · 2,413 Catalogue entries

Of 2,412 other entries for this area and period, 1,932 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

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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