3.1
Earthquake Details: 20 km N of Heron, Montana, United States
11/21/2025, 9:24:39 PM
A magnitude 3.1 earthquake occurred near 20 km N of Heron, Montana, United States on 11/21/2025 at 9:24:39 PM. The seismic event was recorded at a depth of 0 km. No tsunami warning was issued.
No Tsunami WarningStatus: reviewedType: mining explosion
Regional Seismicity
Technical Details
Depth0 km
Significance148
Latitude48.2428
Longitude-115.9180
Event IDus6000rpq0
Magnitude3.1
Updated:2/20/2026, 4:07:28 PM
External Resources
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Time & depth
- Local time
- 11/21/2025, 1:24:39 PM PST
- UTC
- 11/21/2025, 9:24:39 PM UTC
0 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
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: Feb 20, 2026, 04:07 PM 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.