1.8
Earthquake Details: 5 km E of Butte, Montana
Aug 18, 2026, 19:02:37
A magnitude 1.8 earthquake occurred near 5 km E of Butte, Montana on Aug 18, 2026 at 19:02:37. The seismic event was recorded at a depth of -2 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Quarry blast
Regional Seismicity
Technical Details
Depth-2 km
Significance49
Latitude46.0092
Longitude-112.4685
Event IDmb90205528
Magnitude1.8
Updated:Aug 20, 2026, 19:37:40 UTC
External Resources
View on USGS Official SiteLoading map...
Time & depth
- Local time
- Aug 18, 2026, 13:02:37 MDT
- UTC
- Aug 18, 2026, 19:02:37 UTC
-2 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: Aug 20, 2026, 19:37 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.