Earthquake · Reviewed by USGS
M1.0 earthquake 8 km SE of Big Sky, Montana
A magnitude 1.0 earthquake struck 8 km SE of Big Sky, Montana at Oct 21, 2026, 10:23 UTC, at a depth of 13 km. The epicentre was 53 km (33 mi) SSW of Bozeman.
Details
| Magnitude | 1.0 ml |
|---|---|
| Time | Oct 21, 2026, 10:23 UTC |
| Depth | 12.9 km |
| Coordinates | 45.231, -111.284 |
| Felt reports | 0 |
| Tsunami flag | None |
| Source | USGS event page |
02 — Around it
Other earthquakes within 100 km
| Magnitude | Location | Distance | Depth | Time |
|---|---|---|---|---|
| 2.4 | 20 km SW of Whitehall, Montana | 98 km / 61 mi | depth 2 km | |
| 1.2 | 24 km SSE of Mammoth, Wyoming | 77 km / 48 mi | depth 7 km | |
| 1.1 | 6 km SSW of Toston, Montana | 100 km / 62 mi | depth 2 km | |
| 2.3 | 6 km SSW of Toston, Montana | 100 km / 62 mi | depth 1 km | |
| 1.7 | 7 km S of Toston, Montana | 98 km / 61 mi | depth 5 km |
USGS can revise magnitude and location after the first report. See magnitude vs intensity and aftershocks.