M2.1 earthquake 6 km ENE of Willits, California

Magnitude

2.1 (md), micro

Local time

Thu, Dec 29, 1983, 5:27 PM PST

UTC

1983-12-30 01:27:02 UTC

Depth

3.1 km (1.9 mi), shallow

Epicenter

39.425° N, 123.287° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.20

Depth from

From location

Station coverage gap

154°

Stations used

7

• Willits, CaliforniaPopulation 4,861. Forecast6 kmENE
• Ukiah, CaliforniaPopulation 15,917. Forecast31 kmNNW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast120 kmNNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast747 kmNW

After

1. 1.69 km WSW of Cobb, CaliforniaFri, Dec 30, 12:36 PM PST · 15607 days ago · 2 km deep · 80 km away
2. 1.610 km SE of Boonville, CaliforniaSat, Dec 31, 12:04 AM PST · 15606 days ago · 2 km deep · 53 km away
3. 1.56 km WSW of Cobb, CaliforniaSat, Dec 31, 1:41 AM PST · 15606 days ago · 0 km deep · 81 km away
4. 2.28 km WSW of Cobb, CaliforniaSun, Jan 1, 4:39 AM PST · 15605 days ago · 4 km deep · 81 km away
5. 1.77 km W of North Lakeport, CaliforniaSun, Jan 1, 5:27 AM PST · 15605 days ago · 12 km deep · 46 km away
6. 1.67 km WSW of Cobb, CaliforniaSun, Jan 1, 10:36 PM PST · 15604 days ago · 1 km deep · 80 km away
7. 1.86 km W of Cobb, CaliforniaMon, Jan 2, 1:53 AM PST · 15604 days ago · 3 km deep · 79 km away
8. 2.54 km SE of Benbow, CaliforniaMon, Jan 2, 5:36 AM PST · 15604 days ago · 16 km deep · 79 km away
9. 1.56 km W of Cobb, CaliforniaTue, Jan 3, 11:43 AM PST · 15603 days ago · 3 km deep · 80 km away
10. 1.67 km WSW of Cobb, CaliforniaWed, Jan 4, 7:19 AM PST · 15602 days ago · 2 km deep · 80 km away
11. 1.67 km W of Cobb, CaliforniaWed, Jan 4, 2:05 PM PST · 15602 days ago · 3 km deep · 79 km away
12. 2.66 km SW of Cobb, CAThu, Jan 5, 2:28 PM PST · 15601 days ago · 1 km deep · 83 km away
13. 3.07 km W of Cobb, CaliforniaThu, Jan 5, 3:33 PM PST · 15601 days ago · 3 km deep · 80 km away
14. 1.77 km W of Cobb, CaliforniaThu, Jan 5, 4:29 PM PST · 15601 days ago · 3 km deep · 80 km away
15. 1.58 km WNW of Comptche, CaliforniaThu, Jan 5, 7:45 PM PST · 15601 days ago · 1 km deep · 38 km away
16. 2.17 km W of Cobb, CaliforniaThu, Jan 5, 7:50 PM PST · 15601 days ago · 3 km deep · 80 km away
17. 1.77 km WSW of Cobb, CaliforniaFri, Jan 6, 2:49 AM PST · 15600 days ago · 0 km deep · 81 km away
18. 1.86 km W of Cobb, CaliforniaFri, Jan 6, 8:42 PM PST · 15599 days ago · 3 km deep · 79 km away
19. 2.017 km ENE of Potter Valley, CaliforniaSun, Jan 8, 11:56 AM PST · 15598 days ago · 7 km deep · 32 km away
20. 1.77 km WSW of Cobb, CaliforniaSun, Jan 8, 3:52 PM PST · 15598 days ago · 1 km deep · 81 km away
21. 2.26 km W of Cobb, CaliforniaSun, Jan 8, 10:13 PM PST · 15597 days ago · 3 km deep · 79 km away
22. 1.78 km W of Cobb, CaliforniaMon, Jan 9, 11:30 AM PST · 15597 days ago · 8 km deep · 78 km away
23. 1.77 km W of Cobb, CaliforniaMon, Jan 9, 11:50 AM PST · 15597 days ago · 3 km deep · 79 km away
24. 2.6Northern CaliforniaMon, Jan 9, 4:36 PM PST · 15597 days ago · -1 km deep · 80 km away
25. 1.93 km N of Redway, CaliforniaTue, Jan 10, 1:53 PM PST · 15596 days ago · 19 km deep · 93 km away
26. 2.16 km W of Cobb, CaliforniaWed, Jan 11, 9:34 AM PST · 15595 days ago · 1 km deep · 80 km away
27. 1.67 km WSW of Cobb, CaliforniaWed, Jan 11, 5:21 PM PST · 15595 days ago · 1 km deep · 80 km away
28. 1.818 km NNE of Upper Lake, CaliforniaWed, Jan 11, 6:07 PM PST · 15595 days ago · 7 km deep · 41 km away
29. 1.97 km S of Willows, CaliforniaWed, Jan 11, 10:36 PM PST · 15594 days ago · 24 km deep · 93 km away
30. 1.76 km W of Cobb, CaliforniaThu, Jan 12, 8:44 AM PST · 15594 days ago · 3 km deep · 79 km away
31. 2.36 km WSW of Cobb, CaliforniaThu, Jan 12, 9:58 AM PST · 15594 days ago · 0 km deep · 81 km away
32. 1.86 km WSW of Cobb, CaliforniaThu, Jan 12, 12:26 PM PST · 15594 days ago · 3 km deep · 81 km away
33. 1.96 km W of Cobb, CaliforniaThu, Jan 12, 7:06 PM PST · 15594 days ago · 4 km deep · 80 km away
34. 1.65 km SE of Laytonville, CaliforniaThu, Jan 12, 11:38 PM PST · 15593 days ago · 10 km deep · 28 km away
35. 1.97 km WSW of Cobb, CaliforniaFri, Jan 13, 3:33 PM PST · 15593 days ago · 1 km deep · 80 km away
36. 2.57 km WSW of Cobb, CaliforniaFri, Jan 13, 4:11 PM PST · 15593 days ago · 1 km deep · 80 km away
37. 2.15 km SW of Cobb, CaliforniaFri, Jan 13, 7:52 PM PST · 15593 days ago · 0 km deep · 85 km away
38. 1.59 km WSW of Cobb, CaliforniaFri, Jan 13, 10:45 PM PST · 15592 days ago · 1 km deep · 81 km away
39. 1.97 km WSW of Cobb, CaliforniaSat, Jan 14, 8:28 AM PST · 15592 days ago · 2 km deep · 80 km away
40. 2.26 km W of Cobb, CaliforniaSat, Jan 14, 5:51 PM PST · 15592 days ago · 0 km deep · 80 km away
41. 1.6Northern CaliforniaSat, Jan 14, 9:11 PM PST · 15591 days ago · 1 km deep · 82 km away
42. 1.55 km WSW of Cobb, CaliforniaSun, Jan 15, 1:34 AM PST · 15591 days ago · 0 km deep · 82 km away
43. 1.77 km WSW of Cobb, CaliforniaSun, Jan 15, 6:52 AM PST · 15591 days ago · 1 km deep · 81 km away
44. 2.69 km WSW of Cobb, CaliforniaSun, Jan 15, 6:53 AM PST · 15591 days ago · 2 km deep · 80 km away
45. 1.75 km WSW of Cobb, CaliforniaSun, Jan 15, 7:11 AM PST · 15591 days ago · 3 km deep · 83 km away
46. 2.69 km WSW of Cobb, CaliforniaSun, Jan 15, 8:20 AM PST · 15591 days ago · 2 km deep · 80 km away
47. 2.41 km ESE of Flournoy, CaliforniaSun, Jan 15, 12:11 PM PST · 15591 days ago · 26 km deep · 92 km away
48. 1.621 km NE of Potter Valley, CaliforniaSun, Jan 15, 2:52 PM PST · 15591 days ago · 5 km deep · 32 km away
49. 1.57 km WSW of Cobb, CaliforniaTue, Jan 17, 5:24 PM PST · 15589 days ago · 3 km deep · 81 km away
50. 1.57 km WSW of Cobb, CaliforniaTue, Jan 17, 11:37 PM PST · 15588 days ago · 3 km deep · 81 km away
51. 1.68 km ENE of Hidden Valley Lake, CaliforniaWed, Jan 18, 11:15 AM PST · 15588 days ago · 7 km deep · 97 km away
52. 1.76 km W of Cobb, CaliforniaWed, Jan 18, 2:49 PM PST · 15588 days ago · 3 km deep · 79 km away
53. 2.46 km W of Cobb, CaliforniaWed, Jan 18, 10:24 PM PST · 15587 days ago · 3 km deep · 80 km away
54. 2.66 km W of Cobb, CaliforniaThu, Jan 19, 5:30 AM PST · 15587 days ago · 2 km deep · 80 km away
55. 1.77 km W of Cobb, CaliforniaThu, Jan 19, 6:39 AM PST · 15587 days ago · 3 km deep · 80 km away
56. 1.714 km S of Lodoga, CaliforniaThu, Jan 19, 6:58 AM PST · 15587 days ago · 15 km deep · 74 km away
57. 1.64 km SSW of Cobb, CaliforniaThu, Jan 19, 12:01 PM PST · 15587 days ago · -1 km deep · 86 km away
58. 2.36 km W of Cobb, CaliforniaThu, Jan 19, 9:34 PM PST · 15586 days ago · 1 km deep · 79 km away
59. 1.69 km SSE of Sea Ranch, CaliforniaFri, Jan 20, 5:09 AM PST · 15586 days ago · 2 km deep · 88 km away
60. 1.914 km NE of Upper Lake, CaliforniaFri, Jan 20, 6:25 AM PST · 15586 days ago · 7 km deep · 44 km away

The first 60 of 194.

Before

1. 1.712 km N of Brooktrails, CaliforniaThu, Dec 29, 10:23 AM PST · 15608 days ago · 6 km deep · 16 km away
2. 2.57 km W of Cobb, CaliforniaWed, Dec 28, 3:58 PM PST · 15609 days ago · 2 km deep · 80 km away
3. 1.75 km WSW of Cobb, CaliforniaWed, Dec 28, 8:40 AM PST · 15609 days ago · -1 km deep · 81 km away
4. 2.16 km S of Clear Lake Riviera, CaliforniaWed, Dec 28, 7:18 AM PST · 15609 days ago · -1 km deep · 76 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1109297. Read Tue, Sep 22, 2026, 4:04 PM UTC.