M2.1 earthquake 7 km W of Cobb, California

Magnitude

2.1 (md), micro

Local time

Fri, Oct 24, 1975, 6:58 PM PDT

UTC

1975-10-25 01:58:54 UTC

Depth

0.0 km (0.0 mi), shallow

Epicenter

38.822° N, 122.811° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.24

Depth from

From location

Station coverage gap

48°

Stations used

22

• Cobb, CaliforniaPopulation 1,778. Forecast8 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast22 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast43 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast669 kmNW

After

1. 1.67 km W of Cobb, CaliforniaFri, Oct 24, 7:40 PM PDT · 18596 days ago · 3 km deep · 1 km away
2. 1.77 km SSE of Talmage, CaliforniaWed, Oct 29, 7:23 AM PST · 18591 days ago · 5 km deep · 39 km away
3. 1.64 km WSW of Cobb, CaliforniaThu, Oct 30, 11:13 AM PST · 18590 days ago · 1 km deep · 4 km away
4. 1.71 km NW of Larkfield-Wikiup, CaliforniaThu, Oct 30, 11:19 AM PST · 18590 days ago · 0 km deep · 34 km away
5. 1.87 km N of Hopland, CaliforniaSun, Nov 2, 1:16 AM PST · 18588 days ago · 5 km deep · 36 km away
6. 1.66 km WSW of Cobb, CaliforniaMon, Nov 3, 7:16 AM PST · 18586 days ago · 1 km deep · 2 km away
7. 1.811 km NNE of Angwin, CaliforniaFri, Nov 7, 9:59 AM PST · 18582 days ago · 6 km deep · 39 km away
8. 2.35 km WSW of Rutherford, CaliforniaFri, Nov 7, 5:57 PM PST · 18582 days ago · 11 km deep · 51 km away
9. 1.96 km WSW of Cobb, CaliforniaSat, Nov 8, 1:57 AM PST · 18581 days ago · 1 km deep · 2 km away
10. 1.86 km W of Cobb, CaliforniaSat, Nov 8, 1:14 PM PST · 18581 days ago · 1 km deep · 1 km away
11. 1.56 km WSW of Cobb, CaliforniaSat, Nov 8, 8:04 PM PST · 18581 days ago · 1 km deep · 2 km away
12. 1.84 km WSW of Cobb, CaliforniaSun, Nov 9, 4:34 AM PST · 18580 days ago · 3 km deep · 4 km away
13. 1.66 km WSW of Cobb, CaliforniaWed, Nov 12, 6:15 AM PST · 18577 days ago · 1 km deep · 2 km away
14. 2.719 km SW of Stonyford, CaliforniaFri, Nov 14, 11:45 PM PST · 18575 days ago · 10 km deep · 50 km away
15. 1.89 km NW of Cobb, CaliforniaSat, Nov 15, 8:20 PM PST · 18574 days ago · 2 km deep · 6 km away
16. 2.28 km WSW of Cobb, CaliforniaMon, Nov 17, 12:10 PM PST · 18572 days ago · -1 km deep · 2 km away
17. 1.86 km W of Cobb, CaliforniaMon, Nov 17, 10:45 PM PST · 18572 days ago · 3 km deep · 1 km away
18. 1.55 km SE of Clear Lake Riviera, CaliforniaWed, Nov 19, 3:32 AM PST · 18570 days ago · 2 km deep · 16 km away
19. 1.76 km W of Cobb, CaliforniaWed, Nov 19, 5:09 PM PST · 18570 days ago · 4 km deep · 1 km away
20. 2.47 km NE of Sonoma, CaliforniaThu, Nov 20, 6:43 PM PST · 18569 days ago · 11 km deep · 64 km away
21. 3.14 km ENE of Willits, CaliforniaSat, Nov 22, 12:33 AM PST · 18568 days ago · 10 km deep · 80 km away
22. 2.58 km ENE of Willits, CaliforniaSat, Nov 22, 12:54 AM PST · 18568 days ago · -1 km deep · 80 km away
23. 1.94 km W of Cobb, CaliforniaMon, Nov 24, 11:20 AM PST · 18565 days ago · 4 km deep · 3 km away
24. 1.911 km NE of Angwin, CaliforniaMon, Nov 24, 4:25 PM PST · 18565 days ago · 11 km deep · 43 km away
25. 1.73 km ESE of Cloverdale, CaliforniaWed, Nov 26, 11:37 PM PST · 18563 days ago · 3 km deep · 15 km away
26. 2.23 km NNW of Larkfield-Wikiup, CaliforniaThu, Nov 27, 7:59 PM PST · 18562 days ago · 5 km deep · 31 km away
27. 1.76 km W of Cobb, CaliforniaFri, Nov 28, 8:30 AM PST · 18561 days ago · 0 km deep · 2 km away
28. 1.61 km NE of Clear Lake Riviera, CaliforniaSat, Nov 29, 3:50 AM PST · 18560 days ago · 1 km deep · 18 km away
29. 1.67 km W of Cobb, CaliforniaSun, Nov 30, 12:28 PM PST · 18559 days ago · 3 km deep · 1 km away
30. 1.98 km WSW of Cobb, CaliforniaSun, Nov 30, 3:17 PM PST · 18559 days ago · 4 km deep · 3 km away
31. 2.35 km E of Vallejo, CaliforniaMon, Dec 1, 12:34 PM PST · 18558 days ago · 7 km deep · 96 km away
32. 1.7Northern CaliforniaTue, Dec 2, 8:33 AM PST · 18557 days ago · 9 km deep · 24 km away
33. 3.18 km NNW of Redwood Valley, CaliforniaThu, Dec 4, 4:56 PM PST · 18555 days ago · 12 km deep · 68 km away
34. 1.84 km SE of Clear Lake Riviera, CaliforniaThu, Dec 4, 10:58 PM PST · 18555 days ago · 2 km deep · 16 km away
35. 1.67 km W of Cobb, CaliforniaSun, Dec 7, 9:41 PM PST · 18552 days ago · 4 km deep · 1 km away
36. 2.16 km SSW of Boonville, CaliforniaMon, Dec 8, 4:56 PM PST · 18551 days ago · 6 km deep · 52 km away
37. 2.8Northern CaliforniaThu, Dec 11, 8:28 AM PST · 18548 days ago · 6 km deep · 24 km away
38. 1.6near the coast of Northern CaliforniaThu, Dec 11, 4:13 PM PST · 18548 days ago · 6 km deep · 39 km away
39. 2.33 km NNW of Larkfield-Wikiup, CaliforniaThu, Dec 11, 4:44 PM PST · 18548 days ago · 4 km deep · 32 km away
40. 1.64 km NW of Soda Bay, CaliforniaSun, Dec 14, 1:22 AM PST · 18545 days ago · 3 km deep · 23 km away
41. 3.16 km W of Cobb, CaliforniaSun, Dec 14, 2:35 PM PST · 18545 days ago · -1 km deep · 2 km away
42. 1.66 km W of Cobb, CaliforniaSun, Dec 14, 3:51 PM PST · 18545 days ago · 4 km deep · 1 km away
43. 1.9Northern CaliforniaMon, Dec 15, 7:53 AM PST · 18544 days ago · -1 km deep · 3 km away
44. 1.67 km W of Cobb, CaliforniaTue, Dec 16, 3:12 AM PST · 18543 days ago · 3 km deep · 1 km away
45. 2.48 km WSW of Cobb, CaliforniaWed, Dec 17, 2:03 AM PST · 18542 days ago · 3 km deep · 3 km away
46. 2.88 km ESE of Talmage, CaliforniaWed, Dec 17, 4:14 PM PST · 18542 days ago · 7 km deep · 38 km away
47. 2.07 km WSW of Hopland, CaliforniaSat, Dec 20, 12:48 AM PST · 18540 days ago · 5 km deep · 35 km away
48. 1.67 km WSW of Cobb, CaliforniaSat, Dec 20, 7:21 PM PST · 18539 days ago · 1 km deep · 2 km away
49. 2.17 km W of Cobb, CaliforniaMon, Dec 22, 3:17 AM PST · 18537 days ago · 0 km deep · 1 km away
50. 2.27 km W of Cobb, CaliforniaMon, Dec 22, 10:44 AM PST · 18537 days ago · 1 km deep · 0 km away

Before

1. 2.214 km NNW of Moskowite Corner, CaliforniaWed, Oct 22, 6:29 AM PDT · 18598 days ago · 10 km deep · 55 km away
2. 3.313 km E of Angwin, CaliforniaWed, Oct 22, 6:07 AM PDT · 18598 days ago · 11 km deep · 54 km away
3. 2.313 km E of Angwin, CaliforniaWed, Oct 22, 5:35 AM PDT · 18598 days ago · 12 km deep · 54 km away
4. 1.54 km SSE of Clear Lake Riviera, CaliforniaMon, Oct 20, 1:59 PM PDT · 18600 days ago · 2 km deep · 15 km away
5. 1.67 km W of Cobb, CaliforniaSat, Oct 18, 7:55 AM PDT · 18602 days ago · 0 km deep · 1 km away
6. 2.44 km SW of Glen Ellen, CaliforniaMon, Oct 13, 2:11 PM PDT · 18607 days ago · 9 km deep · 58 km away
7. 3.232 km NNE of Potter Valley, CaliforniaSun, Oct 12, 8:25 AM PDT · 18608 days ago · 2 km deep · 83 km away
8. 2.04 km W of Deer Park, CaliforniaSat, Oct 11, 12:05 AM PDT · 18610 days ago · 8 km deep · 41 km away
9. 1.86 km W of Cobb, CaliforniaFri, Oct 10, 1:19 PM PDT · 18610 days ago · 1 km deep · 2 km away
10. 1.86 km W of Cobb, CaliforniaFri, Oct 10, 1:18 PM PDT · 18610 days ago · 1 km deep · 2 km away
11. 1.56 km WSW of Cobb, CaliforniaWed, Oct 8, 11:53 AM PDT · 18612 days ago · 2 km deep · 2 km away
12. 1.86 km W of Cobb, CaliforniaSun, Oct 5, 7:45 PM PDT · 18615 days ago · 3 km deep · 1 km away
13. 1.67 km W of Cobb, CaliforniaSat, Oct 4, 7:12 PM PDT · 18616 days ago · 0 km deep · 1 km away
14. 2.08 km WSW of Cobb, CaliforniaSat, Oct 4, 12:07 PM PDT · 18616 days ago · 3 km deep · 3 km away
15. 3.17 km WSW of Cobb, CaliforniaSat, Oct 4, 12:03 PM PDT · 18616 days ago · 5 km deep · 2 km away
16. 3.17 km WSW of Cobb, CaliforniaSat, Oct 4, 12:03 PM PDT · 18616 days ago · 4 km deep · 2 km away
17. 2.26 km WSW of Cobb, CaliforniaSat, Oct 4, 9:02 AM PDT · 18616 days ago · -1 km deep · 2 km away
18. 2.74 km WSW of Clear Lake Riviera, CaliforniaFri, Oct 3, 3:10 PM PDT · 18617 days ago · -1 km deep · 13 km away
19. 3.04 km WSW of Clear Lake Riviera, CaliforniaFri, Oct 3, 2:45 PM PDT · 18617 days ago · -1 km deep · 13 km away
20. 1.73 km NE of Cobb, CaliforniaThu, Oct 2, 7:52 AM PDT · 18618 days ago · 2 km deep · 10 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1027154. Read Tue, Sep 22, 2026, 8:45 PM UTC.