M3.5 earthquake 40 km SE of Challis, Idaho

Magnitude

3.5 (ML, local (Richter)), minor

Magnitude from

USGS National Earthquake Information Center

Local time

Sun, Dec 4, 1983, 7:13 PM MST

UTC

1983-12-05 02:13:27 UTC

Depth

10.0 km (6.2 mi), shallow

Epicenter

44.302° N, 113.816° W

Region

Idaho

Tsunami flag

No

Status

Reviewed by a seismologist

Depth from

OPERATOR_ASSIGNED

• Challis, IdahoPopulation 1,043. Forecast40 kmSE
• Rexburg, IdahoPopulation 27,663. Forecast170 kmWNW
• Boise, IdahoPopulation 235,684. Forecast206 kmENE
• Calgary, CanadaPopulation 1,306,784. Forecast751 kmS

After

1. 3.218 km SSE of Challis, IdahoMon, Dec 5, 4:51 AM MST · 15642 days ago · 10 km deep · 25 km away
2. 3.437 km NW of Mackay, IdahoWed, Dec 7, 9:24 PM MST · 15639 days ago · 10 km deep · 15 km away
3. 3.819 km E of Clayton, IdahoFri, Dec 9, 6:35 PM MST · 15638 days ago · 10 km deep · 28 km away
4. 4.019 km E of Clayton, IdahoSun, Dec 11, 12:58 PM MST · 15636 days ago · 10 km deep · 27 km away
5. 4.513 km SE of Challis, IdahoSun, Dec 11, 9:55 PM MST · 15635 days ago · 10 km deep · 27 km away
6. 3.213 km SE of Challis, IdahoSun, Dec 11, 10:11 PM MST · 15635 days ago · 10 km deep · 27 km away
7. 3.218 km ESE of Clayton, IdahoTue, Dec 13, 7:55 AM MST · 15634 days ago · 10 km deep · 30 km away
8. 3.626 km E of Clayton, IdahoTue, Dec 13, 10:13 AM MST · 15634 days ago · 10 km deep · 22 km away
9. 4.117 km SSE of Challis, IdahoWed, Dec 14, 11:13 PM MST · 15632 days ago · 10 km deep · 27 km away
10. 3.725 km E of Clayton, IdahoSat, Dec 17, 11:37 AM MST · 15630 days ago · 10 km deep · 23 km away
11. 3.528 km SE of Challis, IdahoMon, Dec 19, 4:31 AM MST · 15628 days ago · 10 km deep · 15 km away
12. 3.612 km SSE of Challis, IdahoMon, Dec 19, 10:27 AM MST · 15628 days ago · 10 km deep · 31 km away
13. 3.127 km E of Clayton, IdahoMon, Dec 19, 8:40 PM MST · 15627 days ago · 10 km deep · 22 km away
14. 3.832 km ESE of Clayton, IdahoTue, Dec 20, 7:54 PM MST · 15626 days ago · 10 km deep · 26 km away
15. 3.325 km SE of Challis, IdahoTue, Dec 20, 11:33 PM MST · 15626 days ago · 10 km deep · 15 km away
16. 3.635 km NW of Mackay, IdahoSun, Dec 25, 2:49 AM MST · 15622 days ago · 10 km deep · 20 km away
17. 3.421 km SSE of Challis, IdahoSun, Dec 25, 5:23 AM MST · 15622 days ago · 10 km deep · 22 km away
18. 4.425 km E of Clayton, IdahoTue, Dec 27, 5:21 AM MST · 15620 days ago · 10 km deep · 21 km away
19. 3.625 km E of Clayton, IdahoTue, Dec 27, 1:19 PM MST · 15620 days ago · 10 km deep · 23 km away
20. 4.024 km E of Clayton, IdahoWed, Dec 28, 1:16 AM MST · 15619 days ago · 11 km deep · 22 km away
21. 3.328 km SSE of Challis, IdahoWed, Dec 28, 8:44 PM MST · 15618 days ago · 10 km deep · 18 km away
22. 3.816 km SE of Challis, IdahoThu, Dec 29, 9:05 AM MST · 15618 days ago · 10 km deep · 23 km away
23. 3.622 km E of Clayton, IdahoSat, Dec 31, 5:10 AM MST · 15616 days ago · 10 km deep · 24 km away
24. 3.433 km E of Clayton, IdahoSun, Jan 1, 5:27 AM MST · 15615 days ago · 10 km deep · 14 km away
25. 3.0southern IdahoTue, Jan 3, 2:30 AM MST · 15613 days ago · 10 km deep · 24 km away
26. 3.323 km E of Clayton, IdahoTue, Jan 3, 2:40 AM MST · 15613 days ago · 10 km deep · 23 km away
27. 3.213 km SSE of Challis, IdahoWed, Jan 4, 7:02 PM MST · 15611 days ago · 10 km deep · 29 km away
28. 4.024 km E of Clayton, IdahoWed, Jan 11, 12:35 AM MST · 15605 days ago · 10 km deep · 22 km away
29. 3.219 km E of Clayton, IdahoSat, Jan 14, 5:05 PM MST · 15602 days ago · 10 km deep · 27 km away
30. 4.523 km S of Clayton, IdahoTue, Jan 24, 2:07 PM MST · 15592 days ago · 10 km deep · 57 km away
31. 3.029 km NW of Challis, IdahoSat, Jan 28, 8:22 PM MST · 15587 days ago · 10 km deep · 68 km away
32. 3.18 km NNW of Challis, IdahoSun, Jan 29, 12:03 AM MST · 15587 days ago · 10 km deep · 47 km away
33. 3.431 km NW of Mackay, IdahoSun, Jan 29, 5:05 AM MST · 15587 days ago · 10 km deep · 24 km away
34. 3.235 km NW of Challis, IdahoMon, Jan 30, 8:24 PM MST · 15585 days ago · 10 km deep · 74 km away
35. 3.230 km ESE of Clayton, IdahoTue, Jan 31, 1:25 AM MST · 15585 days ago · 10 km deep · 20 km away
36. 3.735 km NNW of Challis, IdahoTue, Jan 31, 4:45 AM MST · 15585 days ago · 10 km deep · 73 km away
37. 3.031 km NW of Challis, IdahoTue, Jan 31, 9:50 AM MST · 15585 days ago · 10 km deep · 71 km away
38. 3.429 km NW of Challis, IdahoWed, Feb 1, 6:18 AM MST · 15584 days ago · 10 km deep · 69 km away
39. 3.128 km NNW of Challis, IdahoWed, Feb 1, 9:12 AM MST · 15584 days ago · 10 km deep · 66 km away
40. 3.25 km NNE of Challis, IdahoWed, Feb 1, 3:49 PM MST · 15584 days ago · 10 km deep · 42 km away
41. 3.428 km NW of Challis, IdahoThu, Feb 2, 9:36 AM MST · 15583 days ago · 10 km deep · 68 km away

Before

1. 3.310 km ESE of Challis, IdahoFri, Dec 2, 8:10 PM MST · 15644 days ago · 10 km deep · 30 km away
2. 3.521 km E of Clayton, IdahoThu, Dec 1, 12:52 AM MST · 15646 days ago · 10 km deep · 25 km away
3. 3.629 km WNW of Mackay, IdahoMon, Nov 21, 12:11 PM MST · 15656 days ago · 10 km deep · 32 km away
4. 3.411 km W of Mackay, IdahoWed, Nov 9, 4:00 PM MST · 15668 days ago · 11 km deep · 45 km away
5. 3.47 km ESE of Challis, IdahoWed, Nov 9, 2:25 AM MST · 15668 days ago · 10 km deep · 32 km away
6. 3.527 km E of Clayton, IdahoTue, Nov 8, 4:32 PM MST · 15669 days ago · 7 km deep · 21 km away
7. 3.837 km NW of Mackay, IdahoSun, Nov 6, 2:11 PM MST · 15671 days ago · 10 km deep · 20 km away
8. 4.336 km ESE of Clayton, IdahoSun, Nov 6, 2:04 PM MST · 15671 days ago · 12 km deep · 21 km away
9. 3.531 km ESE of Clayton, IdahoSat, Nov 5, 10:36 AM MST · 15672 days ago · 11 km deep · 21 km away
10. 3.626 km E of Clayton, IdahoFri, Nov 4, 10:37 PM MST · 15672 days ago · 9 km deep · 22 km away

From the USGS Earthquake Hazards Program and its partner networks, event usp000209b. Read Fri, Oct 2, 2026, 1:17 PM UTC.