M1.7 earthquake 16 km SSE of Augusta, Montana

Magnitude

1.7 (ML, local (Richter)), micro

Magnitude from

Montana Bureau of Mines and Geology

Local time

Thu, Jul 26, 2018, 8:18 PM MDT

UTC

2018-07-27 02:18:37 UTC

Depth

4.6 km (2.9 mi), shallow

Epicenter

47.361° N, 112.291° W

Region

Montana

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.1 km horizontally, 1.9 km in depth

Magnitude uncertainty

±0.38

Depth from

From location

Station coverage gap

235°, poorly surrounded by stations

Stations used

17

• Fairfield, MontanaPopulation 733. Forecast37 kmSW
• Great Falls, MontanaPopulation 59,638. Forecast76 kmWSW
• Lethbridge, CanadaPopulation 103,197. Forecast263 kmS
• Calgary, CanadaPopulation 1,306,784. Forecast430 kmSSE

After

1. 1.814 km SSE of Craig, MontanaSat, Jul 28, 3:43 PM MDT · 2990 days ago · 10 km deep · 55 km away
2. 2.115 km SSE of Craig, MontanaSat, Jul 28, 8:11 PM MDT · 2990 days ago · 12 km deep · 55 km away
3. 1.615 km SE of Lincoln, MontanaSun, Jul 29, 6:04 PM MDT · 2989 days ago · 13 km deep · 57 km away
4. 1.54 km SSE of Lincoln, MontanaThu, Aug 2, 2:28 PM MDT · 2986 days ago · 19 km deep · 57 km away
5. 1.710 km ENE of Ovando, MontanaTue, Aug 7, 1:21 AM MDT · 2981 days ago · 5 km deep · 65 km away
6. 1.614 km SSE of Craig, MontanaThu, Aug 9, 1:21 AM MDT · 2979 days ago · 9 km deep · 55 km away
7. 2.47 km NNE of Drummond, MontanaFri, Aug 10, 8:21 AM MDT · 2978 days ago · 8 km deep · 93 km away
8. 2.616 km SE of Lincoln, MontanaSat, Aug 11, 10:53 PM MDT · 2976 days ago · 15 km deep · 58 km away · felt by 1
9. 1.715 km SE of Lincoln, MontanaMon, Aug 13, 10:54 PM MDT · 2974 days ago · 14 km deep · 59 km away
10. 2.415 km SE of Lincoln, MontanaThu, Aug 16, 2:58 PM MDT · 2972 days ago · 12 km deep · 58 km away
11. 2.013 km ESE of Lincoln, MontanaThu, Aug 16, 8:43 PM MDT · 2971 days ago · 14 km deep · 55 km away
12. 1.513 km ESE of Lincoln, MontanaMon, Aug 20, 6:22 AM MDT · 2968 days ago · 14 km deep · 53 km away
13. 1.713 km ESE of Lincoln, MontanaMon, Aug 20, 8:06 PM MDT · 2967 days ago · 15 km deep · 54 km away
14. 1.715 km SE of Lincoln, MontanaTue, Aug 21, 2:35 PM MDT · 2967 days ago · 13 km deep · 58 km away
15. 1.915 km SE of Lincoln, MontanaSat, Aug 25, 5:11 PM MDT · 2962 days ago · 13 km deep · 57 km away
16. 1.510 km ESE of Lincoln, MontanaSun, Aug 26, 10:10 PM MDT · 2961 days ago · 13 km deep · 54 km away
17. 1.611 km ESE of Lincoln, MontanaMon, Aug 27, 2:11 AM MDT · 2961 days ago · 12 km deep · 54 km away
18. 1.610 km ESE of Lincoln, MontanaMon, Aug 27, 5:11 AM MDT · 2961 days ago · 13 km deep · 54 km away
19. 2.410 km ESE of Lincoln, MontanaMon, Aug 27, 5:38 PM MDT · 2960 days ago · 12 km deep · 55 km away
20. 1.811 km ESE of Lincoln, MontanaThu, Aug 30, 12:43 AM MDT · 2958 days ago · 13 km deep · 54 km away
21. 1.611 km ESE of Lincoln, MontanaThu, Aug 30, 12:48 AM MDT · 2958 days ago · 13 km deep · 54 km away
22. 1.510 km ESE of Lincoln, MontanaSat, Sep 1, 6:20 AM MDT · 2956 days ago · 12 km deep · 54 km away
23. 2.213 km SE of Lincoln, MontanaTue, Sep 4, 9:56 AM MDT · 2953 days ago · 10 km deep · 57 km away
24. 2.526 km ENE of Seeley Lake, MontanaFri, Sep 7, 11:28 PM MDT · 2949 days ago · 22 km deep · 67 km away
25. 1.932 km NE of Seeley Lake, MontanaFri, Sep 7, 11:31 PM MDT · 2949 days ago · 21 km deep · 64 km away
26. 1.814 km SE of Lincoln, MontanaSun, Sep 9, 8:49 AM MDT · 2948 days ago · 15 km deep · 58 km away
27. 2.214 km ESE of Lincoln, MontanaMon, Sep 10, 6:41 AM MDT · 2947 days ago · 16 km deep · 56 km away
28. 1.933 km NE of Seeley Lake, MontanaThu, Sep 13, 8:41 PM MDT · 2943 days ago · 19 km deep · 63 km away
29. 1.814 km SE of Lincoln, MontanaFri, Sep 14, 1:54 AM MDT · 2943 days ago · 15 km deep · 57 km away
30. 1.714 km SE of Lincoln, MontanaWed, Sep 19, 1:59 AM MDT · 2938 days ago · 13 km deep · 57 km away
31. 1.714 km ESE of Lincoln, MontanaThu, Sep 20, 11:08 AM MDT · 2937 days ago · 16 km deep · 56 km away
32. 2.012 km ESE of Lincoln, MontanaSat, Sep 22, 7:42 PM MDT · 2934 days ago · 13 km deep · 55 km away
33. 2.716 km ESE of Lincoln, MontanaSun, Sep 23, 9:50 PM MDT · 2933 days ago · 11 km deep · 54 km away · felt by 1

Before

1. 1.715 km SE of Lincoln, MontanaWed, Jul 25, 6:15 AM MDT · 2994 days ago · 14 km deep · 58 km away
2. 2.013 km WNW of Bynum, MontanaWed, Jul 25, 4:05 AM MDT · 2994 days ago · 6 km deep · 77 km away
3. 2.015 km SE of Lincoln, MontanaFri, Jul 20, 6:40 AM MDT · 2999 days ago · 15 km deep · 57 km away
4. 2.413 km ESE of Lincoln, MontanaTue, Jul 17, 9:13 AM MDT · 3002 days ago · 12 km deep · 54 km away
5. 1.925 km WSW of Augusta, MontanaThu, Jul 12, 9:17 AM MDT · 3007 days ago · 24 km deep · 34 km away
6. 1.613 km SE of Lincoln, MontanaTue, Jul 3, 7:15 AM MDT · 3016 days ago · 6 km deep · 56 km away
7. 2.013 km ESE of Lincoln, MontanaTue, Jul 3, 2:30 AM MDT · 3016 days ago · 11 km deep · 55 km away
8. 2.213 km SE of Lincoln, MontanaTue, Jul 3, 2:17 AM MDT · 3016 days ago · 9 km deep · 57 km away
9. 1.813 km ESE of Lincoln, MontanaTue, Jul 3, 2:17 AM MDT · 3016 days ago · 10 km deep · 56 km away
10. 1.713 km SE of Lincoln, MontanaTue, Jul 3, 1:28 AM MDT · 3016 days ago · 7 km deep · 56 km away
11. 1.914 km SE of Lincoln, MontanaMon, Jul 2, 3:37 PM MDT · 3016 days ago · 13 km deep · 58 km away
12. 1.815 km SE of Lincoln, MontanaWed, Jun 27, 11:50 AM MDT · 3022 days ago · 15 km deep · 58 km away

From the USGS Earthquake Hazards Program and its partner networks, event mb80303679. Read Mon, Oct 5, 2026, 8:38 AM UTC.