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M5.1 Depth: 16.0 km

M5.1 Earthquake near Lassen County (United States)

UTC time: 2025-12-31 05:49:32 UTC Local time: —
M5.1 earthquake near Lassen County on Dec 31, 2025 — map of epicenter and shaking intensity | QuakeMap24
M5.1 Earthquake near Lassen County (United States) · 2025-12-31 05:49:32 UTC

About this earthquake

A magnitude M5.1 earthquake was recorded near Lassen County (United States) on December 31, 2025 at 05:49 UTC. With a focal depth of about 16 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this magnitude can damage poorly built structures.

The event was recorded by USGS. United States: 197 earthquakes were recorded in the past 24 hours, the strongest reaching M4.3.

Details

Magnitude
M5.1
Depth
16.0 km
UTC time
2025-12-31 05:49:32 UTC
Local time
—
Country
United States
City
Lassen County
Source
usgs
Coordinates
40.55400, -120.59730
Temperature
-0.4°C

Map

Depth profile

Depth profile Depth: 16 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 16 km
Shallow
16 km
16 km — close to 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

Nearby population centers

Distances are straight-line distances from the epicenter. Population data: GeoNames.

PlaceDistanceDirectionPopulation
Susanville16.0 kmS15'247
Reno132.0 kmSE264'165
Sacramento232.4 kmS524'943

GeoNames · CC BY 4.0

Volcanoes nearby

  • Lassen Volcanic Center
    Distance: 77 km ·Stratovolcano ·Elevation: 3'187 m ·Last eruption: 1917 ·United States
  • Medicine Lake
    Distance: 142 km ·Shield ·Elevation: 2'412 m ·Last eruption: 1060 ·United States
  • Shasta
    Distance: 164 km ·Stratovolcano ·Elevation: 4'317 m ·Last eruption: 1250 ·United States
  • Soda Lakes
    Distance: 186 km ·Maar(s) ·Elevation: 1'251 m ·United States
  • Clear Lake Volcanic Field
    Distance: 256 km ·Volcanic field ·Elevation: 1'439 m ·United States
  • Crater Lake
    Distance: 294 km ·Caldera ·Elevation: 2'487 m ·Last eruption: -2850 ·United States

Subsequent earthquakes nearby

Events recorded after this earthquake within 150 km. They are not automatically classified as aftershocks.

First 6 hours8
First 24 hours10
First 72 hours13
Strongest subsequent eventM4.9
M4.92025-12-31 05:49:36 UTC9.1 kmNorthern California M2.42025-12-31 05:59:06 UTC9.0 kmNORTHERN CALIFORNIA M2.52025-12-31 05:59:07 UTC5.9 km13 km N of Susanville, CA M2.12025-12-31 06:07:22 UTC5.6 km14 km N of Susanville, CA M2.12025-12-31 07:14:53 UTC4.7 km13 km N of Susanville, CA M2.22025-12-31 07:32:10 UTC6.0 km14 km N of Susanville, CA M2.12025-12-31 07:51:25 UTC5.4 km14 km N of Susanville, CA M2.12025-12-31 08:25:18 UTC6.3 km12 km N of Susanville, CA M2.02025-12-31 12:57:33 UTC6.9 km15 km N of Susanville, CA M2.62026-01-01 02:43:04 UTC76.4 km22 km SE of Burney, CA M2.02026-01-02 02:31:31 UTC7.0 km14 km NNW of Susanville, CA M1.92026-01-02 18:03:49 UTC5.3 km14 km N of Susanville, CA

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#1
Earlier events M≥44
Earlier events M≥51
Compared since2025-12-29

The QuakeMap24 comparison dataset begins on 2024-03-23. Earlier earthquakes may not be included.

Strongest earlier events

M5.02025-12-31 05:49:31 UTC6.4 kmNORTHERN CALIFORNIA M4.72025-12-29 00:41:20 UTC22.9 kmNorthern California M4.72025-12-29 00:41:14 UTC8.1 km15 km NNW of Susanville, CA M4.72025-12-29 00:41:13 UTC8.8 kmNORTHERN CALIFORNIA

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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