M2.0 earthquake 8 km WSW of Cobb, California

Magnitude

2.0 (md), micro

Local time

Mon, Feb 28, 1983, 1:41 PM PST

UTC

1983-02-28 21:41:11 UTC

Depth

0.4 km (0.2 mi), shallow

Epicenter

38.802° N, 122.813° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.05

Depth from

From location

Station coverage gap

90°

Stations used

10

• Cobb, CaliforniaPopulation 1,778. Forecast8 kmWSW
• Healdsburg, CaliforniaPopulation 11,742. Forecast22 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast41 kmNNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast668 kmNW

After

1. 2.46 km W of Cobb, CaliforniaTue, Mar 1, 1:10 AM PST · 15912 days ago · 3 km deep · 2 km away
2. 1.66 km WSW of Cobb, CaliforniaTue, Mar 1, 1:16 AM PST · 15912 days ago · 2 km deep · 2 km away
3. 1.67 km NE of Cloverdale, CaliforniaTue, Mar 1, 2:09 AM PST · 15911 days ago · 3 km deep · 14 km away
4. 2.43 km NNW of Larkfield-Wikiup, CaliforniaTue, Mar 1, 5:38 PM PST · 15911 days ago · 5 km deep · 29 km away
5. 1.66 km ESE of Santa Rosa, CaliforniaTue, Mar 1, 5:44 PM PST · 15911 days ago · 6 km deep · 44 km away
6. 1.56 km WSW of Cobb, CaliforniaThu, Mar 3, 8:08 PM PST · 15909 days ago · 0 km deep · 2 km away
7. 1.63 km ESE of Roseland, CaliforniaThu, Mar 3, 9:52 PM PST · 15909 days ago · 6 km deep · 45 km away
8. 2.46 km W of Cobb, CaliforniaFri, Mar 4, 4:56 AM PST · 15908 days ago · 3 km deep · 2 km away
9. 1.77 km WSW of Cobb, CaliforniaFri, Mar 4, 7:24 AM PST · 15908 days ago · 1 km deep · 1 km away
10. 1.76 km W of Cobb, CaliforniaFri, Mar 4, 9:56 AM PST · 15908 days ago · 3 km deep · 2 km away
11. 2.66 km W of Cobb, CaliforniaFri, Mar 4, 11:04 AM PST · 15908 days ago · 3 km deep · 2 km away
12. 1.57 km WSW of Cobb, CaliforniaFri, Mar 4, 12:31 PM PST · 15908 days ago · 3 km deep · 0 km away
13. 1.620 km ENE of Potter Valley, CaliforniaFri, Mar 4, 4:08 PM PST · 15908 days ago · 10 km deep · 67 km away
14. 1.620 km ENE of Potter Valley, CaliforniaFri, Mar 4, 5:29 PM PST · 15908 days ago · 11 km deep · 67 km away
15. 1.88 km WSW of Cobb, CaliforniaSat, Mar 5, 8:02 AM PST · 15907 days ago · 3 km deep · 1 km away
16. 1.77 km WSW of Cobb, CaliforniaSat, Mar 5, 1:38 PM PST · 15907 days ago · 0 km deep · 1 km away
17. 2.17 km WSW of Cobb, CaliforniaSat, Mar 5, 5:12 PM PST · 15907 days ago · 4 km deep · 1 km away
18. 1.910 km NNE of Cloverdale, CaliforniaSun, Mar 6, 7:37 AM PST · 15906 days ago · -1 km deep · 19 km away
19. 1.58 km WSW of Cobb, CaliforniaSun, Mar 6, 12:14 PM PST · 15906 days ago · 2 km deep · 1 km away
20. 2.910 km ESE of Hidden Valley Lake, CaliforniaSun, Mar 6, 12:59 PM PST · 15906 days ago · 8 km deep · 32 km away
21. 2.210 km ESE of Hidden Valley Lake, CaliforniaSun, Mar 6, 1:52 PM PST · 15906 days ago · 6 km deep · 32 km away
22. 2.14 km WSW of Cobb, CaliforniaSun, Mar 6, 2:09 PM PST · 15906 days ago · 1 km deep · 4 km away
23. 1.610 km ESE of Hidden Valley Lake, CaliforniaSun, Mar 6, 2:31 PM PST · 15906 days ago · 6 km deep · 32 km away
24. 2.39 km ESE of Hidden Valley Lake, CaliforniaSun, Mar 6, 6:09 PM PST · 15906 days ago · 7 km deep · 32 km away
25. 2.57 km W of Cobb, CaliforniaTue, Mar 8, 4:33 AM PST · 15904 days ago · 3 km deep · 1 km away
26. 2.37 km WSW of Cobb, CaliforniaWed, Mar 9, 6:55 AM PST · 15903 days ago · 6 km deep · 1 km away
27. 3.07 km WSW of Cobb, CaliforniaWed, Mar 9, 4:32 PM PST · 15903 days ago · 4 km deep · 1 km away
28. 1.67 km W of Cobb, CaliforniaThu, Mar 10, 6:27 PM PST · 15902 days ago · 3 km deep · 2 km away
29. 1.97 km NNE of Clearlake, CaliforniaFri, Mar 11, 12:53 AM PST · 15902 days ago · -1 km deep · 31 km away
30. 2.47 km E of Clearlake Oaks, CaliforniaFri, Mar 11, 12:53 AM PST · 15902 days ago · -1 km deep · 31 km away
31. 1.96 km W of Cobb, CaliforniaFri, Mar 11, 7:25 AM PST · 15901 days ago · 3 km deep · 3 km away
32. 1.86 km W of Cobb, CaliforniaFri, Mar 11, 11:37 AM PST · 15901 days ago · 1 km deep · 2 km away
33. 1.66 km W of Cobb, CaliforniaFri, Mar 11, 12:55 PM PST · 15901 days ago · 4 km deep · 2 km away
34. 1.77 km NE of Clearlake, CaliforniaFri, Mar 11, 6:21 PM PST · 15901 days ago · -1 km deep · 31 km away
35. 3.06 km W of Cobb, CaliforniaSat, Mar 12, 9:15 AM PST · 15900 days ago · 3 km deep · 3 km away
36. 1.87 km WSW of Cobb, CaliforniaSat, Mar 12, 5:17 PM PST · 15900 days ago · 1 km deep · 1 km away
37. 1.79 km NE of Hidden Valley Lake, CaliforniaSat, Mar 12, 5:35 PM PST · 15900 days ago · 4 km deep · 29 km away
38. 2.56 km WSW of Cobb, CaliforniaSat, Mar 12, 7:32 PM PST · 15900 days ago · 3 km deep · 2 km away
39. 2.07 km W of Cobb, CaliforniaSun, Mar 13, 12:32 AM PST · 15900 days ago · 3 km deep · 1 km away
40. 1.67 km SE of Willits, CaliforniaSun, Mar 13, 2:30 AM PST · 15899 days ago · 2 km deep · 74 km away
41. 2.024 km SSE of Covelo, CaliforniaSun, Mar 13, 2:38 AM PST · 15899 days ago · 6 km deep · 92 km away
42. 1.714 km NNE of Moskowite Corner, CaliforniaSun, Mar 13, 6:53 PM PST · 15899 days ago · 17 km deep · 64 km away
43. 2.87 km WSW of Cobb, CaliforniaMon, Mar 14, 12:07 PM PST · 15898 days ago · 0 km deep · 1 km away
44. 1.93 km E of Geyserville, CaliforniaMon, Mar 14, 2:22 PM PST · 15898 days ago · 5 km deep · 12 km away
45. 2.08 km WSW of Cobb, CaliforniaTue, Mar 15, 5:51 AM PST · 15897 days ago · 3 km deep · 1 km away
46. 1.72 km SSE of Talmage, CaliforniaWed, Mar 16, 3:41 AM PST · 15896 days ago · -1 km deep · 46 km away
47. 1.713 km SE of Hidden Valley Lake, CaliforniaWed, Mar 16, 6:34 AM PST · 15896 days ago · 4 km deep · 34 km away
48. 1.818 km ENE of Potter Valley, CaliforniaWed, Mar 16, 4:28 PM PST · 15896 days ago · 11 km deep · 67 km away
49. 2.16 km W of Cobb, CaliforniaWed, Mar 16, 8:25 PM PST · 15896 days ago · 3 km deep · 2 km away
50. 1.68 km WSW of Cobb, CaliforniaThu, Mar 17, 7:44 AM PST · 15895 days ago · 3 km deep · 0 km away
51. 3.06 km WSW of Cobb, CaliforniaThu, Mar 17, 9:10 PM PST · 15895 days ago · 3 km deep · 1 km away
52. 1.66 km WSW of Cobb, CaliforniaThu, Mar 17, 9:18 PM PST · 15895 days ago · 3 km deep · 2 km away
53. 2.17 km WSW of Cobb, CaliforniaFri, Mar 18, 1:03 AM PST · 15895 days ago · 1 km deep · 1 km away
54. 2.23 km N of Redwood Valley, CaliforniaFri, Mar 18, 3:32 AM PST · 15894 days ago · 6 km deep · 64 km away
55. 2.57 km WSW of Cobb, CaliforniaFri, Mar 18, 4:27 AM PST · 15894 days ago · 1 km deep · 1 km away
56. 1.66 km WSW of Cobb, CaliforniaFri, Mar 18, 6:57 AM PST · 15894 days ago · 3 km deep · 2 km away
57. 1.911 km N of Brooktrails, CaliforniaFri, Mar 18, 11:00 AM PST · 15894 days ago · 10 km deep · 96 km away
58. 1.87 km WSW of Cobb, CaliforniaFri, Mar 18, 12:33 PM PST · 15894 days ago · 1 km deep · 1 km away
59. 1.77 km NNE of Nice, CaliforniaFri, Mar 18, 9:35 PM PST · 15894 days ago · 19 km deep · 43 km away
60. 2.319 km ENE of Potter Valley, CaliforniaSat, Mar 19, 3:23 AM PST · 15893 days ago · 12 km deep · 66 km away

The first 60 of 165.

Before

1. 1.73 km NNW of Santa Rosa, CaliforniaSun, Feb 27, 11:27 PM PST · 15913 days ago · 7 km deep · 38 km away
2. 2.07 km WSW of Cobb, CaliforniaSun, Feb 27, 10:45 PM PST · 15913 days ago · 0 km deep · 1 km away
3. 2.05 km WSW of Cobb, CaliforniaSat, Feb 26, 11:02 PM PST · 15914 days ago · 0 km deep · 3 km away
4. 1.76 km W of Cobb, CaliforniaSat, Feb 26, 8:25 PM PST · 15914 days ago · 2 km deep · 2 km away
5. 3.05 km WSW of Cobb, CaliforniaSat, Feb 26, 3:26 PM PST · 15914 days ago · -1 km deep · 3 km away
6. 2.05 km S of Calistoga, CaliforniaSat, Feb 26, 12:23 PM PST · 15914 days ago · 6 km deep · 36 km away
7. 1.524 km NE of Potter Valley, CaliforniaFri, Feb 25, 8:54 PM PST · 15915 days ago · 10 km deep · 77 km away
8. 1.923 km NE of Potter Valley, CaliforniaFri, Feb 25, 8:52 PM PST · 15915 days ago · 10 km deep · 77 km away
9. 1.62 km NNE of Larkfield-Wikiup, CaliforniaFri, Feb 25, 8:07 PM PST · 15915 days ago · 8 km deep · 30 km away
10. 1.77 km WSW of Cobb, CaliforniaThu, Feb 24, 8:03 AM PST · 15916 days ago · 2 km deep · 1 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1088556. Read Tue, Sep 22, 2026, 9:37 PM UTC.