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M2.3 Depth: 18.2 km

M2.3 Earthquake near Alameda, California (United States)

UTC time: 2026-08-21 11:38:49 UTC Local time: —

About this earthquake

A magnitude M2.3 earthquake was recorded near Alameda, California (United States) on August 21, 2026 at 11:38 UTC. With a focal depth of about 18 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 205 earthquakes, the strongest at M3.7.

Details

Magnitude
M2.3
Depth
18.2 km
UTC time
2026-08-21 11:38:49 UTC
Local time
—
Country
United States
State
California
City
Alameda
County
Alameda County
Source
usgs
Coordinates
37.72483, -122.26133
Temperature
13.8°C

Map

Depth profile

Depth profile Depth: 18.2 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 18.2 km
Shallow
18.2 km
18.2 km — close to the regional average (15.4 km)
Regional average: 15.4 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: 284 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mammoth Mountain
    Distance: 284 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono Lake Volcanic Field
    Distance: 285 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Lassen Volcanic Center
    Distance: 314 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Soda Lakes
    Distance: 356 km ·Maar(s) ·Elevation: 1'251 m ·United States

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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