INGV, USGS and EMSC data, with the source next to every number.Sources and limits
1.0

Earthquake M 1.0 in the area of Big Sky, Montana, 21 October 2026, 10:23 UTC

Recorded 6 d ago. Updated 12:23.

Magnitude
ml 1.0
Time (UTC)
10:23:30
Depth
13 km
Coordinates
45.231 N 111.284 W
Source
USGS
Last revision
12:23

Map: OpenStreetMap contributors data, OpenMapTiles tiles.

What it means

Summary from the source data

An earthquake of magnitude 1.0 was recorded at a depth of 13 km, near Big Sky, on 21/10 at 10:23 UTC. The data is preliminary and may be updated.

The hypocentre is shallow, at a depth of 13 km.

Quakes of this size are very frequent and are usually not felt by people.

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