M1.6 earthquake 4 km NNW of Challis, Idaho

Magnitude

1.6 (ML, local (Richter)), micro

Magnitude from

Montana Bureau of Mines and Geology

Local time

Tue, Sep 22, 2015, 4:50 AM MDT

UTC

2015-09-22 10:50:52 UTC

Depth

7.6 km (4.7 mi), shallow

Epicenter

44.545° N, 114.257° W

Region

Idaho

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 1.4 km in depth

Magnitude uncertainty

±0.11

Depth from

From location

Station coverage gap

69°

Stations used

12

• Challis, IdahoPopulation 1,043. Forecast5 kmNNW
• Boise, IdahoPopulation 235,684. Forecast187 kmNE
• Calgary, CanadaPopulation 1,306,784. Forecast723 kmS

After

1. 1.629 km N of Sun Valley, IdahoThu, Oct 1, 3:47 PM MDT · 4019 days ago · 7 km deep · 66 km away
2. 2.011 km SE of Challis, IdahoSun, Oct 4, 9:42 AM MDT · 4016 days ago · 6 km deep · 16 km away
3. 2.122 km WNW of Clayton, IdahoThu, Oct 8, 6:03 AM MDT · 4012 days ago · 7 km deep · 38 km away
4. 1.522 km WNW of Clayton, IdahoThu, Oct 8, 10:38 AM MDT · 4012 days ago · 4 km deep · 38 km away
5. 1.94 km NNW of Challis, IdahoThu, Oct 8, 11:46 AM MDT · 4012 days ago · -1 km deep · 0 km away
6. 2.014 km SE of Challis, IdahoSat, Oct 10, 2:21 AM MDT · 4010 days ago · 10 km deep · 19 km away · felt by 1
7. 1.929 km N of Sun Valley, IdahoSat, Oct 10, 7:28 PM MDT · 4010 days ago · 10 km deep · 66 km away
8. 1.814 km SE of Challis, IdahoSun, Oct 11, 4:14 PM MDT · 4009 days ago · 11 km deep · 19 km away
9. 1.632 km ESE of Clayton, IdahoTue, Oct 13, 9:27 AM MDT · 4007 days ago · 4 km deep · 44 km away
10. 2.113 km SE of Challis, IdahoMon, Oct 19, 11:31 AM MDT · 4001 days ago · 10 km deep · 18 km away
11. 1.722 km ESE of Challis, IdahoMon, Oct 19, 1:45 PM MDT · 4001 days ago · 9 km deep · 26 km away
12. 2.5southern IdahoMon, Oct 19, 1:46 PM MDT · 4001 days ago · 4 km deep · 19 km away
13. 2.07 km ESE of Challis, IdahoWed, Oct 21, 7:55 AM MDT · 3999 days ago · 9 km deep · 12 km away
14. 2.510 km ESE of Challis, IdahoWed, Oct 21, 11:57 PM MDT · 3999 days ago · 11 km deep · 14 km away
15. 3.08 km ESE of Challis, IdahoThu, Oct 22, 3:52 PM MDT · 3998 days ago · 7 km deep · 13 km away · felt by 1
16. 2.711 km NNW of Challis, IdahoSun, Oct 25, 12:34 PM MDT · 3995 days ago · 4 km deep · 6 km away · felt by 1
17. 2.110 km NNE of Stanley, IdahoMon, Oct 26, 7:32 AM MDT · 3994 days ago · -1 km deep · 56 km away
18. 2.411 km NNE of Stanley, IdahoThu, Oct 29, 10:22 AM MDT · 3991 days ago · 8 km deep · 56 km away
19. 1.615 km SE of Challis, IdahoSat, Oct 31, 5:26 AM MDT · 3989 days ago · 6 km deep · 20 km away
20. 1.914 km SE of Challis, IdahoSat, Oct 31, 6:58 AM MDT · 3989 days ago · 9 km deep · 19 km away
21. 1.832 km N of Mackay, IdahoMon, Nov 2, 1:28 AM MST · 3987 days ago · 10 km deep · 61 km away
22. 1.65 km NNW of Challis, IdahoMon, Nov 2, 1:36 AM MST · 3987 days ago · -3 km deep · 1 km away
23. 1.810 km NNE of Stanley, IdahoSun, Nov 8, 7:01 AM MST · 3981 days ago · -1 km deep · 56 km away
24. 1.626 km SSW of Clayton, IdahoMon, Nov 9, 12:30 PM MST · 3980 days ago · 14 km deep · 60 km away
25. 1.823 km NNW of Challis, IdahoTue, Nov 10, 8:17 AM MST · 3979 days ago · -3 km deep · 19 km away
26. 2.021 km NNW of Challis, IdahoSat, Nov 14, 8:10 AM MST · 3975 days ago · 4 km deep · 17 km away
27. 2.413 km ESE of Challis, IdahoMon, Nov 16, 7:02 PM MST · 3973 days ago · 11 km deep · 17 km away

Before

1. 1.8southern IdahoMon, Sep 21, 4:54 PM MDT · 4029 days ago · 10 km deep · 0 km away
2. 2.826 km W of Challis, IdahoMon, Sep 21, 7:18 AM MDT · 4029 days ago · 5 km deep · 24 km away
3. 1.914 km W of Clayton, IdahoMon, Sep 21, 3:51 AM MDT · 4029 days ago · 6 km deep · 41 km away
4. 1.513 km W of Clayton, IdahoSat, Sep 19, 1:56 PM MDT · 4031 days ago · 10 km deep · 42 km away
5. 2.013 km W of Clayton, IdahoSat, Sep 19, 7:40 AM MDT · 4031 days ago · 9 km deep · 42 km away
6. 3.310 km SE of Challis, IdahoThu, Sep 17, 8:02 PM MDT · 4033 days ago · 10 km deep · 15 km away · felt by 4
7. 2.030 km E of Clayton, IdahoWed, Sep 16, 4:15 PM MDT · 4034 days ago · 5 km deep · 41 km away
8. 1.913 km SE of Challis, IdahoMon, Sep 14, 4:36 AM MDT · 4036 days ago · 13 km deep · 18 km away
9. 2.524 km NW of Clayton, IdahoThu, Sep 10, 3:22 PM MDT · 4040 days ago · 8 km deep · 37 km away
10. 2.524 km SE of Challis, IdahoWed, Sep 9, 1:02 AM MDT · 4041 days ago · 10 km deep · 29 km away
11. 2.411 km SE of Challis, IdahoMon, Sep 7, 1:45 PM MDT · 4043 days ago · 11 km deep · 16 km away
12. 1.912 km ESE of Challis, IdahoSun, Sep 6, 6:09 PM MDT · 4044 days ago · 4 km deep · 17 km away
13. 2.138 km NE of Yellow Pine, IdahoFri, Sep 4, 6:24 AM MDT · 4046 days ago · 5 km deep · 96 km away
14. 1.515 km SE of Challis, IdahoWed, Sep 2, 3:24 AM MDT · 4048 days ago · 7 km deep · 20 km away
15. 1.636 km SSW of Salmon, IdahoWed, Sep 2, 1:06 AM MDT · 4048 days ago · 10 km deep · 41 km away
16. 1.913 km SE of Challis, IdahoWed, Sep 2, 12:00 AM MDT · 4049 days ago · 9 km deep · 18 km away
17. 2.615 km SE of Challis, IdahoTue, Sep 1, 8:51 PM MDT · 4049 days ago · 5 km deep · 21 km away
18. 2.712 km SE of Challis, IdahoTue, Sep 1, 8:48 PM MDT · 4049 days ago · 6 km deep · 17 km away
19. 2.315 km SE of Challis, IdahoTue, Sep 1, 4:05 PM MDT · 4049 days ago · 7 km deep · 20 km away
20. 2.711 km SE of Challis, IdahoTue, Sep 1, 7:16 AM MDT · 4049 days ago · 5 km deep · 16 km away · felt by 1

From the USGS Earthquake Hazards Program and its partner networks, event mb80098874. Read Fri, Oct 2, 2026, 5:45 PM UTC.