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United States · Wyoming

M3.1 Earthquake near Sweetwater County, Wyoming (United States)

UTC time: 2026-08-21 07:09:25 UTC Local time: —

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About this earthquake

A magnitude M3.1 earthquake was recorded near Sweetwater County, Wyoming (United States) on August 21, 2026 at 07:09 UTC. Earthquakes of this magnitude are often felt but rarely cause damage.

The event was recorded by USGS. United States: over the past 24 hours, QuakeMap24 logged 186 earthquakes, the strongest at M4.1.

Details

ID
bb716549ab7dfb3f39d11b5e7e76c0c48a0c8520
Magnitude
M3.1
Depth
-3.3 km
UTC time
2026-08-21 07:09:25 UTC
Local time
—
Country
United States
State
Wyoming
City
Sweetwater County
County
Sweetwater County
Source
usgs
Coordinates
41.57650, -109.88766
Temperature
19.3°C

Depth profile

Depth profile Depth: -3.3 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km -3.3 km
Shallow
-3.3 km
0 km — shallower than the regional average (15.2 km)
Regional average: 15.2 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

  • Hell's Half Acre
    Distance: 299 km ·Shield ·Elevation: 1'632 m ·Last eruption: -3250 ·United States
  • Wapi Lava Field
    Distance: 310 km ·Shield ·Elevation: 1'597 m ·Last eruption: -300 ·United States
  • Dotsero
    Distance: 321 km ·Maar ·Elevation: 2'230 m ·Last eruption: -2200 ·United States
  • Craters of the Moon
    Distance: 357 km ·Volcanic field ·Elevation: 2'005 m ·Last eruption: -130 ·United States
  • Black Rock Desert
    Distance: 365 km ·Volcanic field ·Elevation: 1'800 m ·Last eruption: 1290 ·United States
  • Black Butte Crater Lava Field
    Distance: 408 km ·Shield ·Elevation: 1'478 m ·Last eruption: -8180 ·United States

United States

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 1,428 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

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Historic earthquake map · United States

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Country statistics · United States

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