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M1.3 Depth: 12.4 km

M1.3 Earthquake near 4 km SW of Alamo, CA (United States)

UTC time: 2025-12-19 21:33:12 UTC Local time: —

About this earthquake

A magnitude M1.3 earthquake was recorded near 4 km SW of Alamo, CA (United States) on December 19, 2025 at 21:33 UTC. The hypocenter lay relatively close to the surface at around 12 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: over the past 24 hours, QuakeMap24 logged 214 earthquakes, the strongest at M3.9.

Details

Magnitude
M1.3
Depth
12.4 km
UTC time
2025-12-19 21:33:12 UTC
Local time
—
Country
United States
City
California
Source
usgs
Coordinates
37.83017, -122.06800
Temperature
15.5°C

Map

Depth profile

Depth profile Depth: 12.4 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 12.4 km
Shallow
12.4 km
12.4 km — shallower than the regional average (15.7 km)
Regional average: 15.7 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: 141 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Mono-Inyo Craters
    Distance: 267 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mono Lake Volcanic Field
    Distance: 267 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Mammoth Mountain
    Distance: 268 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Lassen Volcanic Center
    Distance: 300 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Soda Lakes
    Distance: 335 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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