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Largest earthquakes in or near Sweet Grass, Montana, USA, on record since 1900 - list, stats and map

Updated: Aug 17, 2022 01:53 GMT -
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Quakes since 1900:

  • 1 quake above magnitude 7
  • 6 quakes between magnitude 6 and 7
  • 15 quakes between magnitude 5 and 6
  • 81 quakes between magnitude 4 and 5
  • 451 quakes between magnitude 3 and 4
Since 1900, Sweet Grass has had 1 quake of magnitude 7.3, 6 quakes between 6.0 and 7.0, 15 quakes between 5.0 and 6.0, 81 quakes between 4.0 and 5.0, and 451 quakes between 3.0 and 4.0. See all quakes in the past 24 hours!

Latest quake: Mag. 3.9 | Wyoming, 17 mi NE of West Yellowstone, Gallatin County, Montana, USA -

Strongest quake: Mag. 7.3 | 6.4 mi NW of West Yellowstone, Gallatin County, Montana, USA -

Quakes in nearby regions

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Showing quakes since 1900, magnitude 3 or higher (554 quakes):
Date and timeMag
Depth
Nearest volcano (distance)LocationDetailsMap
Sep 18, 2022 6:55 am (GMT -6) (Sep 18, 2022 12:55 GMT)
3.9

10.3 km
41 km (25 mi)Wyoming, 17 mi northeast of West Yellowstone, Gallatin County, Montana, USA 5 reportsMore
Aug 31, 2022 7:33 pm (GMT -6) (Sep 1, 2022 01:33 GMT)
3.3

9.6 km
20 km (12 mi)54 mi north of Jackson, Teton County, Wyoming, USA More
Aug 26, 2022 3:25 pm (GMT -6) (Aug 26, 2022 21:25 GMT)
3.0

8.8 km
41 km (25 mi)Wyoming, 17 mi northeast of West Yellowstone, Gallatin County, Montana, USA More
Aug 25, 2022 11:51 pm (GMT -6) (Aug 26, 2022 05:51 GMT)
3.1

12 km
40 km (25 mi)Wyoming, 17 mi northeast of West Yellowstone, Gallatin County, Montana, USA More
Aug 25, 2022 9:35 pm (GMT -6) (Aug 26, 2022 03:35 GMT)
3.1

9.6 km
41 km (25 mi)Wyoming, 17 mi northeast of West Yellowstone, Gallatin County, Montana, USA More
Jul 30, 2022 1:44 am (GMT -6) (Jul 30, 2022 07:44 GMT)
3.0

8.1 km
41 km (25 mi)Wyoming, 17 mi northeast of West Yellowstone, Gallatin County, Montana, USA 1 reportMore
May 11, 2022 7:32 am (GMT -6) (May 11, 2022 13:32 GMT)
4.2

14 km
61 km (38 mi)47 mi west of Cody, Park County, Wyoming, USA 21 reportsMore
Dec 17, 2021 12:53 am (GMT -7) (Dec 17, 2021 07:53 GMT)
3.1

1.7 km
182 km (113 mi)31 mi northwest of Bozeman, Gallatin County, Montana, USA 4 reportsMore
Sep 3, 2021 11:51 pm (GMT -6) (Sep 4, 2021 05:51 GMT)
3.0

5.5 km
31 km (19 mi)Wyoming, 34 mi east of West Yellowstone, Gallatin County, Montana, USA 3 reportsMore
Aug 20, 2021 11:00 am (GMT -6) (Aug 20, 2021 17:00 GMT)
3.1

9.4 km
45 km (28 mi)12 mi northeast of West Yellowstone, Gallatin County, Montana, USA More
Jul 16, 2021 6:45 pm (GMT -6) (Jul 17, 2021 00:45 GMT)
3.6

6.4 km
28 km (17 mi)Wyoming, 91 mi southeast of Bozeman, Gallatin County, Montana, USA 4 reportsMore
Jul 16, 2021 1:44 pm (GMT -6) (Jul 16, 2021 19:44 GMT)
3.2

7.1 km
27 km (17 mi)65 Km SSE of Mammoth, Wyoming 1 reportMore
Jul 16, 2021 8:12 am (GMT -6) (Jul 16, 2021 14:12 GMT)
3.1

7.2 km
29 km (18 mi)66 Km SSE of Mammoth, Wyoming 2 reportsMore
Jul 16, 2021 12:54 GMT
3.0

6.9 km
28 km (17 mi)66 Km SSE of Mammoth, Wyoming More
Jun 28, 2021 8:02 am (GMT -6) (Jun 28, 2021 14:02 GMT)
3.1

10.9 km
41 km (25 mi)17 Km NE of West Yellowstone, Montana More
Jan 6, 2021 8:38 am (GMT -7) (Jan 6, 2021 15:38 GMT)
3.2

4.7 km
35 km (22 mi)26 Km S of Mammoth, Wyoming, USA 1 reportMore
Nov 25, 2020 5:58 am (GMT -7) (Nov 25, 2020 12:58 GMT)
3.1

7.5 km
52 km (32 mi)8.7 mi north of West Yellowstone, Gallatin County, Montana, USA More
May 29, 2020 10:39 GMT
3.1

9.6 km
35 km (22 mi)25 km ENE of West Yellowstone, Montana (USA) More
2020-02-29 06:06:32 -07:00 (Feb 29, 2020 13:06 GMT)
3.9

6.4 km
80 km (50 mi)66 mi south of Bozeman, Gallatin County, Montana 5 reportsMore
2019-12-15 05:32:52 -07:00 (Dec 15, 2019 12:32 GMT)
3.5

16 km
38 km (24 mi)25km WSW of Old Faithful Geyser, Wyoming (USA) More
2019-12-14 19:09:29 -07:00 (Dec 15, 2019 02:09 GMT)
3.2

3.3 km
19 km (12 mi)23km NE of Old Faithful Geyser, Wyoming (USA) More
Show more
Estimated combined seismic energy released: 7.9 x 1015 joules (2207 gigawatt hours, equivalent to 1.9 x 106 tons of TNT or 118.7 atomic bombs!) | about seismic energy

Latest seismic signals

Seismic station: Red Lodge, Montana, USA (RLMT/US network) | Show on map | Station Info
Seismic station Red Lodge, Montana, USA: seismogram of vertical movement last 60 minutes (source: IRIS/BUD)
Seismogram (vertical component) last 60 minutes. Source: IRIS query builder webtool
Show more

Earthquake Catalog - Look up past earthquakes

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Sweet Grass Earthquake FAQ

When was the latest earthquake in Sweet Grass?

The last earthquake in Sweet Grass occurred 11 weeks ago: Moderate mag. 3.9 earthquake - Wyoming, 17 mi northeast of West Yellowstone, Gallatin County, Montana, USA, on Sunday, Sep 18, 2022 at 6:55 am (GMT -6).

How many quakes were there in Sweet Grass since 1900?

Since 1900, Sweet Grass, Montana, USA had 554 quakes up to magnitude 7.3.

What was the strongest quake in Sweet Grass since 1900?

The strongest earthquake in Sweet Grass since 1900 occurred 63 years ago: Major magnitude 7.3 earthquake - 6.4 mi northwest of West Yellowstone, Gallatin County, Montana, USA, on Tuesday, August 18, 1959 at 06:37 GMT.

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