M2.4 earthquake 7 km WSW of Cobb, California

Magnitude

2.4 (md), micro

Local time

Wed, Dec 28, 1983, 6:04 AM PST

UTC

1983-12-28 14:04:51 UTC

Depth

1.1 km (0.7 mi), shallow

Epicenter

38.803° N, 122.806° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.23

Depth from

From location

Station coverage gap

76°

Stations used

18

• Cobb, CaliforniaPopulation 1,778. Forecast7 kmWSW
• Healdsburg, CaliforniaPopulation 11,742. Forecast22 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast41 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast667 kmNW

After

1. 1.67 km WSW of Cobb, CaliforniaWed, Jan 11, 5:21 PM PST · 15594 days ago · 1 km deep · 0 km away
2. 1.818 km NNE of Upper Lake, CaliforniaWed, Jan 11, 6:07 PM PST · 15594 days ago · 7 km deep · 57 km away
3. 1.97 km S of Willows, CaliforniaWed, Jan 11, 10:36 PM PST · 15594 days ago · 24 km deep · 90 km away
4. 1.76 km W of Cobb, CaliforniaThu, Jan 12, 8:44 AM PST · 15594 days ago · 3 km deep · 2 km away
5. 2.36 km WSW of Cobb, CaliforniaThu, Jan 12, 9:58 AM PST · 15594 days ago · 0 km deep · 1 km away
6. 1.86 km WSW of Cobb, CaliforniaThu, Jan 12, 12:26 PM PST · 15594 days ago · 3 km deep · 1 km away
7. 1.96 km W of Cobb, CaliforniaThu, Jan 12, 7:06 PM PST · 15593 days ago · 4 km deep · 1 km away
8. 1.67 km ENE of Black Point-Green Point, CaliforniaFri, Jan 13, 5:04 AM PST · 15593 days ago · 16 km deep · 79 km away
9. 1.97 km WSW of Cobb, CaliforniaFri, Jan 13, 3:33 PM PST · 15592 days ago · 1 km deep · 0 km away
10. 2.57 km WSW of Cobb, CaliforniaFri, Jan 13, 4:11 PM PST · 15592 days ago · 1 km deep · 0 km away
11. 2.15 km SW of Cobb, CaliforniaFri, Jan 13, 7:52 PM PST · 15592 days ago · 0 km deep · 4 km away
12. 1.59 km WSW of Cobb, CaliforniaFri, Jan 13, 10:45 PM PST · 15592 days ago · 1 km deep · 2 km away
13. 1.97 km WSW of Cobb, CaliforniaSat, Jan 14, 8:28 AM PST · 15592 days ago · 2 km deep · 0 km away
14. 2.26 km W of Cobb, CaliforniaSat, Jan 14, 5:51 PM PST · 15591 days ago · 0 km deep · 1 km away
15. 1.6Northern CaliforniaSat, Jan 14, 9:11 PM PST · 15591 days ago · 1 km deep · 3 km away
16. 1.55 km WSW of Cobb, CaliforniaSun, Jan 15, 1:34 AM PST · 15591 days ago · 0 km deep · 2 km away
17. 1.77 km WSW of Cobb, CaliforniaSun, Jan 15, 6:52 AM PST · 15591 days ago · 1 km deep · 0 km away
18. 2.69 km WSW of Cobb, CaliforniaSun, Jan 15, 6:53 AM PST · 15591 days ago · 2 km deep · 2 km away
19. 1.75 km WSW of Cobb, CaliforniaSun, Jan 15, 7:11 AM PST · 15591 days ago · 3 km deep · 3 km away
20. 2.69 km WSW of Cobb, CaliforniaSun, Jan 15, 8:20 AM PST · 15591 days ago · 2 km deep · 2 km away
21. 1.621 km NE of Potter Valley, CaliforniaSun, Jan 15, 2:52 PM PST · 15591 days ago · 5 km deep · 72 km away
22. 1.57 km WSW of Cobb, CaliforniaTue, Jan 17, 5:24 PM PST · 15588 days ago · 3 km deep · 1 km away
23. 1.57 km WSW of Cobb, CaliforniaTue, Jan 17, 11:37 PM PST · 15588 days ago · 3 km deep · 1 km away
24. 1.68 km ENE of Hidden Valley Lake, CaliforniaWed, Jan 18, 11:15 AM PST · 15588 days ago · 7 km deep · 30 km away
25. 1.76 km W of Cobb, CaliforniaWed, Jan 18, 2:49 PM PST · 15588 days ago · 3 km deep · 2 km away
26. 2.46 km W of Cobb, CaliforniaWed, Jan 18, 10:24 PM PST · 15587 days ago · 3 km deep · 2 km away
27. 2.66 km W of Cobb, CaliforniaThu, Jan 19, 5:30 AM PST · 15587 days ago · 2 km deep · 1 km away
28. 1.77 km W of Cobb, CaliforniaThu, Jan 19, 6:39 AM PST · 15587 days ago · 3 km deep · 1 km away
29. 1.714 km S of Lodoga, CaliforniaThu, Jan 19, 6:58 AM PST · 15587 days ago · 15 km deep · 49 km away
30. 1.64 km SSW of Cobb, CaliforniaThu, Jan 19, 12:01 PM PST · 15587 days ago · -1 km deep · 6 km away
31. 2.36 km W of Cobb, CaliforniaThu, Jan 19, 9:34 PM PST · 15586 days ago · 1 km deep · 3 km away
32. 1.69 km SSE of Sea Ranch, CaliforniaFri, Jan 20, 5:09 AM PST · 15586 days ago · 2 km deep · 55 km away
33. 1.914 km NE of Upper Lake, CaliforniaFri, Jan 20, 6:25 AM PST · 15586 days ago · 7 km deep · 52 km away
34. 1.97 km WSW of Cobb, CaliforniaFri, Jan 20, 3:47 PM PST · 15585 days ago · 2 km deep · 1 km away
35. 2.07 km W of Cobb, CaliforniaFri, Jan 20, 6:35 PM PST · 15585 days ago · 3 km deep · 1 km away
36. 1.612 km NNW of Moskowite Corner, CaliforniaFri, Jan 20, 9:15 PM PST · 15585 days ago · 2 km deep · 57 km away
37. 1.622 km NE of Potter Valley, CaliforniaFri, Jan 20, 10:40 PM PST · 15585 days ago · 7 km deep · 76 km away
38. 1.68 km WSW of Cobb, CaliforniaSat, Jan 21, 1:37 PM PST · 15585 days ago · 3 km deep · 1 km away
39. 2.14 km NW of Kelseyville, CaliforniaSat, Jan 21, 8:18 PM PST · 15584 days ago · 4 km deep · 24 km away
40. 1.65 km WSW of Cobb, CaliforniaSat, Jan 21, 10:18 PM PST · 15584 days ago · 1 km deep · 2 km away
41. 2.26 km W of Cobb, CaliforniaSun, Jan 22, 10:30 PM PST · 15583 days ago · 3 km deep · 2 km away
42. 1.68 km WSW of Cobb, CaliforniaSun, Jan 22, 10:58 PM PST · 15583 days ago · 3 km deep · 1 km away
43. 2.46 km W of Cobb, CaliforniaSun, Jan 22, 11:52 PM PST · 15583 days ago · 3 km deep · 2 km away
44. 1.76 km W of Cobb, CaliforniaSun, Jan 22, 11:52 PM PST · 15583 days ago · 3 km deep · 2 km away
45. 1.70 km ESE of Crockett, CaliforniaMon, Jan 23, 5:47 AM PST · 15583 days ago · 9 km deep · 99 km away
46. 1.9near the coast of Northern CaliforniaTue, Jan 24, 4:39 PM PST · 15581 days ago · 8 km deep · 77 km away
47. 2.415 km W of Guinda, CaliforniaTue, Jan 24, 5:00 PM PST · 15581 days ago · 8 km deep · 38 km away
48. 2.0Northern CaliforniaTue, Jan 24, 5:55 PM PST · 15581 days ago · 3 km deep · 2 km away
49. 1.78 km WNW of Cobb, CaliforniaWed, Jan 25, 3:07 AM PST · 15581 days ago · 0 km deep · 7 km away
50. 1.77 km WSW of Cobb, CaliforniaWed, Jan 25, 2:57 PM PST · 15581 days ago · 2 km deep · 0 km away
51. 1.76 km WSW of Cobb, CaliforniaWed, Jan 25, 5:02 PM PST · 15580 days ago · 3 km deep · 1 km away
52. 1.66 km WSW of Cobb, CaliforniaWed, Jan 25, 6:04 PM PST · 15580 days ago · 1 km deep · 1 km away
53. 1.87 km W of Cobb, CaliforniaWed, Jan 25, 6:41 PM PST · 15580 days ago · 3 km deep · 1 km away
54. 1.58 km WSW of Cobb, CaliforniaWed, Jan 25, 7:27 PM PST · 15580 days ago · 3 km deep · 1 km away
55. 1.76 km W of Cobb, CaliforniaThu, Jan 26, 1:43 AM PST · 15580 days ago · 3 km deep · 2 km away
56. 1.97 km W of Cobb, CaliforniaFri, Jan 27, 6:59 AM PST · 15579 days ago · 3 km deep · 2 km away
57. 1.90 km S of Deer Park, CaliforniaFri, Jan 27, 1:21 PM PST · 15579 days ago · 11 km deep · 43 km away
58. 1.97 km WSW of Cobb, CaliforniaFri, Jan 27, 2:22 PM PST · 15579 days ago · 3 km deep · 1 km away
59. 2.612 km WNW of Guinda, CaliforniaFri, Jan 27, 5:05 PM PST · 15578 days ago · 15 km deep · 41 km away
60. 2.06 km WSW of Cobb, CaliforniaFri, Jan 27, 11:44 PM PST · 15578 days ago · 0 km deep · 1 km away

The first 60 of 167.

From the USGS Earthquake Hazards Program and its partner networks, event nc1109209. Read Tue, Sep 22, 2026, 10:59 AM UTC.