3.7
Earthquake Details: 22 km SSW of Mammoth, Wyoming
Oct 28, 2025, 13:22:28
A magnitude 3.7 earthquake occurred near 22 km SSW of Mammoth, Wyoming on Oct 28, 2025 at 13:22:28. The seismic event was recorded at a depth of 7.16 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
Technical Details
Depth7.16 km
Significance214
Latitude44.8020
Longitude-110.8453
Event IDuu80120481
Magnitude3.7
Updated:Jan 15, 2026, 22:46:59 UTC
External Resources
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Time & depth
- Local time
- Oct 28, 2025, 07:22:28 MDT
- UTC
- Oct 28, 2025, 13:22:28 UTC
7.16 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
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Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Jan 15, 2026, 22:46 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0. CC BY 4.0
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies. CC BY 4.0
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.