Earthquake · Reviewed by USGS

M3.9 earthquake 21 km N of Spencer, Idaho

A magnitude 3.9 earthquake struck 21 km N of Spencer, Idaho at Sep 8, 2025, 06:59 UTC, at a depth of 11 km. The epicentre was 88 km (55 mi) NNW of Rexburg.

Details

Magnitude	3.9 mwr
Time	Sep 8, 2025, 06:59 UTC
Depth	11.5 km
Coordinates	44.557, -112.219
Felt reports	0
Tsunami flag	None
Source	USGS event page

Fig. 1The epicentre and other earthquakes within 100 km, since the day before

01 — Nearby

Nearest cities

02 — Around it

Other earthquakes within 100 km

Other earthquakes within 100 km since the day before this event
Magnitude	Location	Distance	Depth	Time
1.1	46 km NW of Island Park, Idaho	37 km / 23 mi	depth 6 km	Oct 20, 10:12 UTC
1.1	4 km ESE of Hebgen Lake Estates, Montana	88 km / 55 mi	depth 12 km	Oct 17, 15:48 UTC
1.7	33 km NW of Lima, Montana	63 km / 39 mi	depth 4 km	Oct 14, 17:04 UTC
1.9	19 km NNE of Dillon, Montana	95 km / 59 mi	depth 9 km	Oct 13, 17:42 UTC
2.0	15 km NNE of Dillon, Montana	92 km / 57 mi	depth 11 km	Oct 12, 01:23 UTC
1.3	1 km WSW of Lima, Montana	32 km / 20 mi	depth 9 km	Oct 9, 10:38 UTC
1.4	28 km S of Ennis, Montana	72 km / 45 mi	depth -2 km	Oct 8, 19:18 UTC
1.0	4 km SSE of West Yellowstone, Montana	90 km / 56 mi	depth 13 km	Oct 7, 12:12 UTC
1.0	3 km NW of Lima, Montana	34 km / 21 mi	depth 10 km	Oct 5, 10:43 UTC
1.0	8 km NE of West Yellowstone, Montana	97 km / 60 mi	depth 11 km	Oct 4, 23:49 UTC
1.4	8 km NE of West Yellowstone, Montana	97 km / 60 mi	depth 11 km	Oct 4, 22:02 UTC
2.2	45 km NNE of Spencer, Idaho	29 km / 18 mi	depth 3 km	Oct 4, 18:36 UTC
1.0	17 km E of Lima, Montana	14 km / 9 mi	depth 1 km	Oct 1, 08:02 UTC
1.1	7 km ENE of Hebgen Lake Estates, Montana	92 km / 57 mi	depth 8 km	Sep 30, 08:58 UTC
1.7	29 km W of Hebgen Lake Estates, Montana	60 km / 37 mi	depth 11 km	Sep 26, 09:42 UTC
2.8	3 km ESE of Hebgen Lake Estates, Montana	87 km / 54 mi	depth 11 km	Sep 8, 07:21 UTC
2.7	48 km NE of Spencer, Idaho	35 km / 22 mi	depth 10 km	Jul 1, 23:44 UTC
3.3	18 km S of Lima, Montana	32 km / 20 mi	depth 8 km	Jul 1, 00:35 UTC
3.2	18 km N of Leadore, Idaho	96 km / 60 mi	depth 6 km	May 25, 19:38 UTC
2.8	19 km NE of Lima, Montana	25 km / 16 mi	depth 11 km	May 8, 08:16 UTC
2.9	30 km W of Hebgen Lake Estates, Montana	59 km / 37 mi	depth 10 km	Apr 5, 02:26 UTC
2.5	9 km NNE of Dillon, Montana	86 km / 53 mi	depth 5 km	Jan 26, 11:05 UTC
2.5	10 km NNE of Dillon, Montana	88 km / 54 mi	depth 10 km	Jan 24, 15:24 UTC
2.6	10 km W of Hebgen Lake Estates, Montana	74 km / 46 mi	depth 12 km	Jan 10, 18:06 UTC
2.6	24 km N of Spencer, Idaho	2 km / 1 mi	depth 10 km	Nov 5, 04:38 UTC

USGS can revise magnitude and location after the first report. See magnitude vs intensity and aftershocks.