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M1.0 Depth: 6.5 km

M1.0 Earthquake near 33 km S of Mammoth, Wyoming (United States)

UTC time: 2025-12-16 19:21:19 UTC Local time: —

About this earthquake

On December 16, 2025 at 19:21 UTC, a magnitude M1.0 earthquake occurred near 33 km S of Mammoth, Wyoming (United States). The hypocenter lay relatively close to the surface at around 6 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 226 earthquakes, the strongest at M5.3.

Details

Magnitude
M1.0
Depth
6.5 km
UTC time
2025-12-16 19:21:19 UTC
Local time
—
Country
United States
City
Wyoming
Source
usgs
Coordinates
44.67750, -110.68333
Temperature
0.2°C

Map

Depth profile

Depth profile Depth: 6.5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 6.5 km
Shallow
6.5 km
6.5 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

  • Hell's Half Acre
    Distance: 193 km ·Shield ·Elevation: 1'632 m ·Last eruption: -3250 ·United States
  • Craters of the Moon
    Distance: 268 km ·Volcanic field ·Elevation: 2'005 m ·Last eruption: -130 ·United States
  • Wapi Lava Field
    Distance: 285 km ·Shield ·Elevation: 1'597 m ·Last eruption: -300 ·United States
  • Black Butte Crater Lava Field
    Distance: 338 km ·Shield ·Elevation: 1'478 m ·Last eruption: -8180 ·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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