M1.6 earthquake 7 km E of Willits, California

Magnitude

1.6 (md), micro

Local time

Wed, Jul 22, 1981, 5:33 PM PDT

UTC

1981-07-23 00:33:38 UTC

Depth

7.6 km (4.8 mi), shallow

Epicenter

39.410° N, 123.263° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.7 km in depth

Magnitude uncertainty

±0.21

Depth from

From location

Station coverage gap

62°

Stations used

12

• Willits, CaliforniaPopulation 4,861. Forecast8 kmE
• Ukiah, CaliforniaPopulation 15,917. Forecast29 kmN
• Santa Rosa, CaliforniaPopulation 178,127. Forecast118 kmNNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast745 kmNW

After

1. 2.311 km N of Covelo, CaliforniaThu, Jul 23, 9:52 PM PDT · 16498 days ago · 0 km deep · 54 km away
2. 2.04 km WSW of Cobb, CaliforniaFri, Jul 24, 6:46 PM PDT · 16497 days ago · 2 km deep · 80 km away
3. 1.69 km WSW of Cobb, CaliforniaFri, Jul 24, 7:02 PM PDT · 16497 days ago · 1 km deep · 77 km away
4. 2.210 km ESE of Potter Valley, CaliforniaSat, Jul 25, 12:23 AM PDT · 16497 days ago · -1 km deep · 26 km away
5. 1.87 km WSW of Cobb, CaliforniaSat, Jul 25, 4:12 PM PDT · 16497 days ago · 1 km deep · 78 km away
6. 1.8Northern CaliforniaMon, Jul 27, 5:37 AM PDT · 16495 days ago · 2 km deep · 77 km away
7. 1.66 km WSW of Cobb, CaliforniaMon, Jul 27, 4:56 PM PDT · 16494 days ago · 0 km deep · 80 km away
8. 1.96 km WSW of Cobb, CaliforniaTue, Jul 28, 1:45 AM PDT · 16494 days ago · 3 km deep · 78 km away
9. 3.06 km WSW of Cobb, CaliforniaTue, Jul 28, 2:37 AM PDT · 16494 days ago · 4 km deep · 78 km away
10. 1.86 km WSW of Cobb, CaliforniaTue, Jul 28, 4:59 AM PDT · 16494 days ago · 0 km deep · 79 km away
11. 2.45 km WSW of Cobb, CaliforniaTue, Jul 28, 5:26 AM PDT · 16494 days ago · 1 km deep · 79 km away
12. 1.56 km WSW of Cobb, CaliforniaTue, Jul 28, 5:46 AM PDT · 16494 days ago · 0 km deep · 79 km away
13. 2.322 km WNW of Elk Creek, CaliforniaTue, Jul 28, 10:40 PM PDT · 16493 days ago · 7 km deep · 48 km away
14. 1.76 km WSW of Cobb, CaliforniaWed, Jul 29, 3:31 AM PDT · 16493 days ago · 3 km deep · 78 km away
15. 1.512 km SSW of Laytonville, CaliforniaWed, Jul 29, 9:37 PM PDT · 16492 days ago · 1 km deep · 30 km away
16. 1.54 km SSE of Potter Valley, CaliforniaWed, Jul 29, 11:50 PM PDT · 16492 days ago · 10 km deep · 20 km away
17. 1.59 km WSW of Cobb, CaliforniaThu, Jul 30, 3:38 AM PDT · 16492 days ago · 2 km deep · 78 km away
18. 2.522 km NE of Potter Valley, CaliforniaThu, Jul 30, 4:51 AM PDT · 16492 days ago · 12 km deep · 29 km away
19. 1.86 km W of Cobb, CaliforniaThu, Jul 30, 10:12 AM PDT · 16492 days ago · 0 km deep · 76 km away
20. 1.95 km SW of Cobb, CaliforniaFri, Jul 31, 5:52 AM PDT · 16491 days ago · 0 km deep · 81 km away
21. 2.65 km SW of Cobb, CaliforniaFri, Jul 31, 5:56 AM PDT · 16491 days ago · 1 km deep · 81 km away
22. 1.55 km SW of Cobb, CaliforniaFri, Jul 31, 7:33 AM PDT · 16491 days ago · -1 km deep · 81 km away
23. 1.66 km W of Cobb, CaliforniaFri, Jul 31, 11:19 AM PDT · 16491 days ago · 3 km deep · 77 km away
24. 1.66 km W of Cobb, CaliforniaFri, Jul 31, 2:15 PM PDT · 16491 days ago · 3 km deep · 77 km away
25. 1.715 km S of Leggett, CaliforniaSun, Aug 2, 12:23 AM PDT · 16489 days ago · -1 km deep · 53 km away
26. 1.99 km NW of Redwood Valley, CaliforniaSun, Aug 2, 8:18 PM PDT · 16488 days ago · 5 km deep · 10 km away
27. 2.07 km WSW of Cobb, CaliforniaTue, Aug 4, 10:35 PM PDT · 16486 days ago · 0 km deep · 78 km away
28. 1.79 km WSW of Cobb, CaliforniaTue, Aug 4, 11:28 PM PDT · 16486 days ago · 2 km deep · 78 km away
29. 1.92 km NE of Garberville, CaliforniaThu, Aug 6, 4:30 AM PDT · 16485 days ago · 17 km deep · 89 km away
30. 1.76 km W of Cobb, CaliforniaSun, Aug 9, 3:25 AM PDT · 16482 days ago · 3 km deep · 78 km away
31. 2.04 km WSW of Cobb, CaliforniaSun, Aug 9, 9:04 AM PDT · 16482 days ago · 4 km deep · 79 km away
32. 1.66 km ESE of Talmage, CaliforniaSun, Aug 9, 2:31 PM PDT · 16482 days ago · 8 km deep · 36 km away
33. 2.17 km WSW of Cobb, CaliforniaSun, Aug 9, 2:59 PM PDT · 16482 days ago · 4 km deep · 79 km away
34. 2.04 km N of Redway, CaliforniaMon, Aug 10, 1:52 AM PDT · 16481 days ago · 20 km deep · 96 km away
35. 1.82 km WNW of Cobb, CaliforniaMon, Aug 10, 4:37 AM PDT · 16481 days ago · 0 km deep · 78 km away
36. 1.78 km WSW of Cobb, CaliforniaTue, Aug 11, 4:22 PM PDT · 16480 days ago · 1 km deep · 78 km away
37. 1.57 km W of Cobb, CaliforniaWed, Aug 12, 11:11 AM PDT · 16479 days ago · 1 km deep · 76 km away
38. 2.67 km W of Cobb, CaliforniaWed, Aug 12, 11:11 AM PDT · 16479 days ago · 1 km deep · 76 km away
39. 1.78 km W of Cobb, CaliforniaWed, Aug 12, 11:32 AM PDT · 16479 days ago · 1 km deep · 76 km away
40. 1.69 km WSW of Cobb, CaliforniaWed, Aug 12, 3:10 PM PDT · 16479 days ago · 2 km deep · 78 km away
41. 1.69 km WSW of Cobb, CaliforniaWed, Aug 12, 3:11 PM PDT · 16479 days ago · 2 km deep · 77 km away
42. 1.610 km ESE of Willits, CaliforniaFri, Aug 14, 12:00 AM PDT · 16477 days ago · 6 km deep · 3 km away
43. 1.54 km WNW of Potter Valley, CaliforniaFri, Aug 14, 5:16 AM PDT · 16477 days ago · 9 km deep · 12 km away
44. 2.09 km WSW of Cobb, CaliforniaFri, Aug 14, 5:18 PM PDT · 16476 days ago · 2 km deep · 78 km away
45. 1.76 km W of Cobb, CaliforniaSat, Aug 15, 12:21 AM PDT · 16476 days ago · 4 km deep · 77 km away
46. 1.69 km NE of Comptche, CaliforniaSat, Aug 15, 10:29 AM PDT · 16476 days ago · 5 km deep · 24 km away
47. 2.11 km WSW of Geyserville, CaliforniaSun, Aug 16, 4:24 AM PDT · 16475 days ago · 5 km deep · 84 km away
48. 1.74 km S of Cobb, CaliforniaSun, Aug 16, 12:25 PM PDT · 16475 days ago · 1 km deep · 84 km away
49. 1.67 km NNW of Redwood Valley, CaliforniaSun, Aug 16, 12:28 PM PDT · 16475 days ago · 4 km deep · 10 km away
50. 2.17 km W of Cobb, CaliforniaSun, Aug 16, 7:05 PM PDT · 16474 days ago · 4 km deep · 77 km away
51. 1.54 km WNW of Potter Valley, CaliforniaMon, Aug 17, 4:12 AM PDT · 16474 days ago · -1 km deep · 12 km away
52. 2.27 km W of Cobb, CaliforniaMon, Aug 17, 11:26 PM PDT · 16473 days ago · 4 km deep · 77 km away
53. 1.74 km S of Cobb, CaliforniaWed, Aug 19, 3:20 AM PDT · 16472 days ago · 1 km deep · 84 km away
54. 1.8near the coast of Northern CaliforniaThu, Aug 20, 1:25 PM PDT · 16471 days ago · 5 km deep · 22 km away
55. 2.49 km WSW of Cobb, CaliforniaFri, Aug 21, 6:52 AM PDT · 16470 days ago · 1 km deep · 78 km away
56. 2.78 km WSW of Cobb, CaliforniaSat, Aug 22, 12:39 AM PDT · 16469 days ago · 2 km deep · 78 km away
57. 1.79 km WSW of Cobb, CaliforniaSat, Aug 22, 12:42 AM PDT · 16469 days ago · 3 km deep · 78 km away
58. 1.59 km WSW of Cobb, CaliforniaSat, Aug 22, 1:02 AM PDT · 16469 days ago · 3 km deep · 78 km away
59. 3.26 km W of Cobb, CaliforniaSat, Aug 22, 5:30 AM PDT · 16469 days ago · 4 km deep · 77 km away
60. 1.810 km W of Cobb, CaliforniaSat, Aug 22, 3:50 PM PDT · 16469 days ago · -1 km deep · 75 km away

The first 60 of 102.

Before

1. 2.04 km ESE of Calpella, CaliforniaWed, Jul 22, 10:50 AM PDT · 16500 days ago · 6 km deep · 23 km away
2. 1.56 km W of Cobb, CaliforniaWed, Jul 22, 7:56 AM PDT · 16500 days ago · 2 km deep · 77 km away
3. 1.76 km W of Cobb, CaliforniaWed, Jul 22, 2:19 AM PDT · 16500 days ago · 3 km deep · 78 km away
4. 1.96 km W of Cobb, CaliforniaWed, Jul 22, 1:28 AM PDT · 16500 days ago · 3 km deep · 77 km away
5. 1.55 km WSW of Cobb, CaliforniaTue, Jul 21, 7:54 PM PDT · 16500 days ago · 4 km deep · 79 km away
6. 1.97 km WSW of Cobb, CaliforniaTue, Jul 21, 3:40 PM PDT · 16501 days ago · 2 km deep · 78 km away
7. 2.17 km W of Cobb, CaliforniaSun, Jul 19, 9:37 PM PDT · 16502 days ago · 4 km deep · 77 km away
8. 2.04 km WSW of Cobb, CaliforniaSun, Jul 19, 9:42 AM PDT · 16503 days ago · 1 km deep · 80 km away
9. 1.99 km WSW of Cobb, CaliforniaSat, Jul 18, 2:08 AM PDT · 16504 days ago · 1 km deep · 77 km away
10. 2.24 km WSW of Cobb, CaliforniaWed, Jul 15, 8:06 PM PDT · 16506 days ago · 1 km deep · 80 km away
11. 1.56 km W of Cobb, CaliforniaWed, Jul 15, 7:33 PM PDT · 16506 days ago · 3 km deep · 77 km away
12. 1.52 km WSW of Redwood Valley, CaliforniaTue, Jul 14, 12:20 PM PDT · 16508 days ago · 6 km deep · 17 km away
13. 1.919 km ENE of Potter Valley, CaliforniaMon, Jul 13, 7:29 PM PDT · 16508 days ago · 11 km deep · 31 km away
14. 1.56 km W of Cobb, CaliforniaMon, Jul 13, 3:23 PM PDT · 16509 days ago · 3 km deep · 77 km away
15. 2.122 km WNW of Elk Creek, CaliforniaMon, Jul 13, 11:56 AM PDT · 16509 days ago · 6 km deep · 48 km away
16. 1.88 km NW of Redwood Valley, CaliforniaMon, Jul 13, 7:17 AM PDT · 16509 days ago · 3 km deep · 10 km away
17. 1.824 km NE of Potter Valley, CaliforniaMon, Jul 13, 4:15 AM PDT · 16509 days ago · 12 km deep · 29 km away
18. 1.919 km ENE of Potter Valley, CaliforniaSun, Jul 12, 10:08 PM PDT · 16509 days ago · 9 km deep · 31 km away
19. 1.54 km WSW of Cobb, CaliforniaSun, Jul 12, 5:16 PM PDT · 16509 days ago · 1 km deep · 80 km away
20. 2.18 km NE of Hidden Valley Lake, CaliforniaSun, Jul 12, 3:31 PM PDT · 16510 days ago · 8 km deep · 91 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1065843. Read Thu, Sep 24, 2026, 10:55 AM UTC.