M3.9 earthquake 32 km WNW of Mackay, Idaho

Magnitude

3.9 (ML, local (Richter)), minor

Magnitude from

USGS National Earthquake Information Center

Local time

Fri, Oct 28, 1983, 12:42 PM MDT

UTC

1983-10-28 18:42:56 UTC

Depth

10.0 km (6.2 mi), shallow

Epicenter

44.004° N, 114.004° W

Region

Idaho

Tsunami flag

No

Status

Reviewed by a seismologist

Depth from

OPERATOR_ASSIGNED

• Sun Valley, IdahoPopulation 1,422. Forecast44 kmNE
• Jerome, IdahoPopulation 11,184. Forecast148 kmNNE
• Boise, IdahoPopulation 235,684. Forecast182 kmENE
• Calgary, CanadaPopulation 1,306,784. Forecast784 kmS

After

1. 3.623 km SSE of Challis, IdahoFri, Oct 28, 1:30 PM MDT · 15679 days ago · 10 km deep · 36 km away
2. 5.429 km NW of Mackay, IdahoFri, Oct 28, 1:51 PM MDT · 15679 days ago · 7 km deep · 11 km away
3. 3.733 km ESE of Clayton, IdahoFri, Oct 28, 2:19 PM MDT · 15679 days ago · 10 km deep · 19 km away
4. 4.024 km SSE of Challis, IdahoFri, Oct 28, 8:37 PM MDT · 15679 days ago · 10 km deep · 35 km away
5. 3.626 km SE of Challis, IdahoFri, Oct 28, 9:11 PM MDT · 15679 days ago · 10 km deep · 37 km away
6. 3.527 km E of Clayton, IdahoFri, Oct 28, 10:02 PM MDT · 15679 days ago · 10 km deep · 31 km away
7. 3.929 km E of Clayton, IdahoSat, Oct 29, 2:15 AM MDT · 15678 days ago · 10 km deep · 28 km away
8. 3.641 km SE of Challis, IdahoSat, Oct 29, 5:47 AM MDT · 15678 days ago · 10 km deep · 27 km away
9. 3.627 km WNW of Mackay, IdahoSat, Oct 29, 1:48 PM MDT · 15678 days ago · 10 km deep · 6 km away
10. 5.423 km E of Clayton, IdahoSat, Oct 29, 5:29 PM MDT · 15678 days ago · 9 km deep · 26 km away
11. 5.522 km E of Clayton, IdahoSat, Oct 29, 5:39 PM MDT · 15678 days ago · 10 km deep · 32 km away
12. 3.819 km ESE of Clayton, IdahoSat, Oct 29, 5:49 PM MDT · 15678 days ago · 10 km deep · 24 km away
13. 3.725 km SSE of Challis, IdahoSat, Oct 29, 7:07 PM MDT · 15678 days ago · 10 km deep · 35 km away
14. 4.334 km WNW of Mackay, IdahoSat, Oct 29, 7:24 PM MDT · 15678 days ago · 13 km deep · 9 km away
15. 4.216 km ESE of Clayton, IdahoSat, Oct 29, 7:59 PM MDT · 15678 days ago · 10 km deep · 28 km away
16. 4.014 km E of Clayton, IdahoSat, Oct 29, 8:54 PM MDT · 15678 days ago · 10 km deep · 34 km away
17. 3.924 km SE of Clayton, IdahoSat, Oct 29, 9:45 PM MDT · 15678 days ago · 10 km deep · 18 km away
18. 3.922 km ENE of Clayton, IdahoSun, Oct 30, 1:14 AM MDT · 15677 days ago · 10 km deep · 35 km away
19. 3.723 km E of Clayton, IdahoSun, Oct 30, 2:41 AM MST · 15677 days ago · 10 km deep · 34 km away
20. 3.624 km SSE of Challis, IdahoSun, Oct 30, 5:54 AM MST · 15677 days ago · 10 km deep · 34 km away
21. 3.837 km ESE of Clayton, IdahoSun, Oct 30, 10:49 AM MST · 15677 days ago · 10 km deep · 18 km away
22. 3.623 km SE of Challis, IdahoSun, Oct 30, 12:23 PM MST · 15677 days ago · 10 km deep · 41 km away
23. 3.524 km SE of Challis, IdahoSun, Oct 30, 4:56 PM MST · 15677 days ago · 10 km deep · 36 km away
24. 3.632 km E of Clayton, IdahoMon, Oct 31, 9:08 AM MST · 15676 days ago · 10 km deep · 28 km away
25. 3.735 km ESE of Clayton, IdahoTue, Nov 1, 6:50 AM MST · 15675 days ago · 11 km deep · 17 km away
26. 3.719 km E of Clayton, IdahoWed, Nov 2, 5:41 AM MST · 15674 days ago · 10 km deep · 30 km away
27. 4.225 km E of Clayton, IdahoWed, Nov 2, 4:43 PM MST · 15674 days ago · 5 km deep · 30 km away
28. 4.321 km E of Clayton, IdahoWed, Nov 2, 6:50 PM MST · 15674 days ago · 10 km deep · 34 km away
29. 3.415 km SSE of Challis, IdahoWed, Nov 2, 7:24 PM MST · 15674 days ago · 10 km deep · 43 km away
30. 3.921 km E of Clayton, IdahoWed, Nov 2, 7:59 PM MST · 15674 days ago · 10 km deep · 31 km away
31. 3.618 km E of Clayton, IdahoWed, Nov 2, 9:15 PM MST · 15674 days ago · 10 km deep · 32 km away
32. 3.517 km SE of Challis, IdahoWed, Nov 2, 9:47 PM MST · 15674 days ago · 10 km deep · 44 km away
33. 3.621 km ENE of Clayton, IdahoThu, Nov 3, 7:14 AM MST · 15673 days ago · 10 km deep · 36 km away
34. 3.626 km SSE of Challis, IdahoThu, Nov 3, 8:47 AM MST · 15673 days ago · 10 km deep · 33 km away
35. 3.535 km NW of Mackay, IdahoThu, Nov 3, 10:00 PM MST · 15673 days ago · 7 km deep · 16 km away
36. 3.530 km E of Clayton, IdahoFri, Nov 4, 12:08 AM MST · 15673 days ago · 8 km deep · 23 km away
37. 3.626 km E of Clayton, IdahoFri, Nov 4, 10:37 PM MST · 15672 days ago · 9 km deep · 25 km away
38. 3.531 km ESE of Clayton, IdahoSat, Nov 5, 10:36 AM MST · 15671 days ago · 11 km deep · 20 km away
39. 4.336 km ESE of Clayton, IdahoSun, Nov 6, 2:04 PM MST · 15670 days ago · 12 km deep · 16 km away
40. 3.837 km NW of Mackay, IdahoSun, Nov 6, 2:11 PM MST · 15670 days ago · 10 km deep · 16 km away
41. 3.527 km E of Clayton, IdahoTue, Nov 8, 4:32 PM MST · 15668 days ago · 7 km deep · 26 km away
42. 3.47 km ESE of Challis, IdahoWed, Nov 9, 2:25 AM MST · 15667 days ago · 10 km deep · 54 km away
43. 3.411 km W of Mackay, IdahoWed, Nov 9, 4:00 PM MST · 15667 days ago · 11 km deep · 23 km away
44. 3.629 km WNW of Mackay, IdahoMon, Nov 21, 12:11 PM MST · 15655 days ago · 10 km deep · 5 km away
45. 3.521 km E of Clayton, IdahoThu, Dec 1, 12:52 AM MST · 15645 days ago · 10 km deep · 33 km away
46. 3.310 km ESE of Challis, IdahoFri, Dec 2, 8:10 PM MST · 15644 days ago · 10 km deep · 54 km away
47. 3.540 km SE of Challis, IdahoSun, Dec 4, 7:13 PM MST · 15642 days ago · 10 km deep · 36 km away
48. 3.218 km SSE of Challis, IdahoMon, Dec 5, 4:51 AM MST · 15641 days ago · 10 km deep · 41 km away
49. 3.437 km NW of Mackay, IdahoWed, Dec 7, 9:24 PM MST · 15639 days ago · 10 km deep · 21 km away
50. 3.819 km E of Clayton, IdahoFri, Dec 9, 6:35 PM MST · 15637 days ago · 10 km deep · 31 km away
51. 4.019 km E of Clayton, IdahoSun, Dec 11, 12:58 PM MST · 15635 days ago · 10 km deep · 34 km away
52. 4.513 km SE of Challis, IdahoSun, Dec 11, 9:55 PM MST · 15635 days ago · 10 km deep · 48 km away
53. 3.213 km SE of Challis, IdahoSun, Dec 11, 10:11 PM MST · 15635 days ago · 10 km deep · 47 km away
54. 3.218 km ESE of Clayton, IdahoTue, Dec 13, 7:55 AM MST · 15633 days ago · 10 km deep · 28 km away
55. 3.626 km E of Clayton, IdahoTue, Dec 13, 10:13 AM MST · 15633 days ago · 10 km deep · 27 km away
56. 4.117 km SSE of Challis, IdahoWed, Dec 14, 11:13 PM MST · 15632 days ago · 10 km deep · 42 km away
57. 3.725 km E of Clayton, IdahoSat, Dec 17, 11:37 AM MST · 15629 days ago · 10 km deep · 27 km away
58. 3.528 km SE of Challis, IdahoMon, Dec 19, 4:31 AM MST · 15627 days ago · 10 km deep · 33 km away
59. 3.612 km SSE of Challis, IdahoMon, Dec 19, 10:27 AM MST · 15627 days ago · 10 km deep · 46 km away
60. 3.127 km E of Clayton, IdahoMon, Dec 19, 8:40 PM MST · 15627 days ago · 10 km deep · 24 km away

The first 60 of 65.

Before

1. 4.123 km E of Clayton, IdahoFri, Oct 28, 12:31 PM MDT · 15679 days ago · 10 km deep · 28 km away
2. 4.022 km E of Clayton, IdahoFri, Oct 28, 11:20 AM MDT · 15679 days ago · 10 km deep · 27 km away
3. 4.023 km SSE of Challis, IdahoFri, Oct 28, 9:54 AM MDT · 15679 days ago · 10 km deep · 36 km away
4. 3.722 km E of Clayton, IdahoFri, Oct 28, 9:27 AM MDT · 15679 days ago · 10 km deep · 31 km away
5. 4.331 km ESE of Clayton, IdahoFri, Oct 28, 9:14 AM MDT · 15679 days ago · 10 km deep · 20 km away
6. 6.9The 1983 Borah Peak Earthquake, IdahoFri, Oct 28, 8:06 AM MDT · 15679 days ago · 10 km deep · 13 km away · felt by 3
7. 3.620 km NW of Challis, IdahoWed, Oct 12, 1:37 AM MDT · 15695 days ago · 5 km deep · 78 km away

From the USGS Earthquake Hazards Program and its partner networks, event usp0001zca. Read Thu, Oct 1, 2026, 6:40 PM UTC.