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M1.6 Depth: 14.2 km

M1.6 Earthquake near 18 km NE of Greenhorn, CA (United States)

UTC time: 2025-12-18 13:46:46 UTC Local time: —

About this earthquake

On December 18, 2025 at 13:46 UTC, a magnitude M1.6 earthquake occurred near 18 km NE of Greenhorn, CA (United States). With a focal depth of about 14 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The data is provided by USGS and cross-checked across seismological networks. United States: 193 earthquakes were recorded in the past 24 hours, the strongest reaching M5.8.

Details

Magnitude
M1.6
Depth
14.2 km
UTC time
2025-12-18 13:46:46 UTC
Local time
—
Country
United States
City
California
Source
usgs
Coordinates
40.00650, -120.58383
Temperature
3.1°C

Map

Depth profile

Depth profile Depth: 14.2 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 14.2 km
Shallow
14.2 km
14.2 km — close to the regional average (15.9 km)
Regional average: 15.9 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

  • Lassen Volcanic Center
    Distance: 95 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Soda Lakes
    Distance: 155 km ·Maar(s) ·Elevation: 1'251 m ·United States
  • Medicine Lake
    Distance: 196 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Shasta
    Distance: 207 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Clear Lake Volcanic Field
    Distance: 220 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Mono Lake Volcanic Field
    Distance: 260 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·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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