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M1.1 Depth: -0.2 km

M1.1 Earthquake near 4 km S of Anderson Springs, CA (United States)

UTC time: 2025-10-21 04:30:48 UTC Local time: —

About this earthquake

On October 21, 2025 at 04:30 UTC, a magnitude M1.1 earthquake occurred near 4 km S of Anderson Springs, CA (United States). 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: 179 earthquakes were recorded in the past 24 hours, the strongest reaching M4.7.

Details

Magnitude
M1.1
Depth
-0.2 km
UTC time
2025-10-21 04:30:48 UTC
Local time
—
Country
United States
City
California
Source
usgs
Coordinates
38.74183, -122.68900
Temperature
18.4°C

Map

Depth profile

Depth profile Depth: -0.2 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km -0.2 km
Shallow
-0.2 km
0 km — shallower than the regional average (15.4 km)
Regional average: 15.4 km
Negative depth = focus above sea level (terrain elevation).
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: 26 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Lassen Volcanic Center
    Distance: 219 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Shasta
    Distance: 300 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Mono Lake Volcanic Field
    Distance: 329 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States
  • Medicine Lake
    Distance: 333 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Mono-Inyo Craters
    Distance: 336 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States

Historic earthquake map · United States

Open history map
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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