M1.5 earthquake 7 km W of Cobb, California

Magnitude

1.5 (md), micro

Local time

Wed, Nov 30, 1983, 4:06 PM PST

UTC

1983-12-01 00:06:46 UTC

Depth

2.6 km (1.6 mi), shallow

Epicenter

38.809° N, 122.807° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.12

Depth from

From location

Station coverage gap

83°

Stations used

13

• Cobb, CaliforniaPopulation 1,778. Forecast7 kmW
• Healdsburg, CaliforniaPopulation 11,742. Forecast23 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast42 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast668 kmNW

After

1. 1.76 km W of Cobb, CaliforniaTue, Dec 6, 6:55 PM PST · 15631 days ago · 3 km deep · 1 km away
2. 1.714 km NNE of Angwin, CaliforniaTue, Dec 6, 7:42 PM PST · 15631 days ago · 9 km deep · 39 km away
3. 1.68 km W of Cobb, CaliforniaWed, Dec 7, 3:44 AM PST · 15630 days ago · 0 km deep · 2 km away
4. 2.76 km WSW of Cobb, CaliforniaWed, Dec 7, 8:10 AM PST · 15630 days ago · 0 km deep · 2 km away
5. 1.6Northern CaliforniaWed, Dec 7, 9:43 AM PST · 15630 days ago · 1 km deep · 10 km away
6. 1.77 km WSW of Cobb, CaliforniaThu, Dec 8, 12:52 AM PST · 15630 days ago · 0 km deep · 0 km away
7. 1.87 km WSW of Cobb, CaliforniaThu, Dec 8, 1:11 AM PST · 15630 days ago · -1 km deep · 1 km away
8. 1.918 km E of Potter Valley, CaliforniaThu, Dec 8, 3:53 AM PST · 15629 days ago · 8 km deep · 60 km away
9. 2.47 km WSW of Cobb, CaliforniaThu, Dec 8, 9:03 PM PST · 15629 days ago · 0 km deep · 1 km away
10. 2.28 km WSW of Cobb, CaliforniaFri, Dec 9, 5:59 AM PST · 15628 days ago · 3 km deep · 2 km away
11. 1.77 km WSW of Cobb, CaliforniaFri, Dec 9, 9:16 AM PST · 15628 days ago · 0 km deep · 0 km away
12. 2.67 km WSW of Cobb, CaliforniaFri, Dec 9, 9:32 AM PST · 15628 days ago · 1 km deep · 0 km away
13. 1.77 km WSW of Cobb, CaliforniaFri, Dec 9, 2:15 PM PST · 15628 days ago · 1 km deep · 1 km away
14. 1.85 km SSW of Cobb, CaliforniaFri, Dec 9, 3:31 PM PST · 15628 days ago · -1 km deep · 7 km away
15. 2.86 km W of Cobb, CaliforniaFri, Dec 9, 9:50 PM PST · 15628 days ago · 3 km deep · 1 km away
16. 2.56 km E of Penngrove, CaliforniaSat, Dec 10, 7:29 AM PST · 15627 days ago · 5 km deep · 61 km away
17. 2.16 km W of Cobb, CaliforniaSat, Dec 10, 7:45 AM PST · 15627 days ago · 3 km deep · 1 km away
18. 1.94 km W of Cobb, CaliforniaSat, Dec 10, 1:43 PM PST · 15627 days ago · 0 km deep · 3 km away
19. 1.69 km W of Cobb, CaliforniaSat, Dec 10, 8:36 PM PST · 15627 days ago · 1 km deep · 2 km away
20. 2.610 km WSW of Hopland, CaliforniaSun, Dec 11, 12:55 AM PST · 15627 days ago · 2 km deep · 39 km away
21. 3.414 km N of Brooktrails, CaliforniaSun, Dec 11, 1:01 PM PST · 15626 days ago · 6 km deep · 98 km away
22. 2.010 km WSW of Hopland, CaliforniaSun, Dec 11, 5:53 PM PST · 15626 days ago · 2 km deep · 39 km away
23. 2.311 km ESE of Potter Valley, CaliforniaMon, Dec 12, 8:10 AM PST · 15625 days ago · 6 km deep · 55 km away
24. 1.87 km WSW of Cobb, CaliforniaMon, Dec 12, 5:20 PM PST · 15625 days ago · 1 km deep · 1 km away
25. 1.88 km NE of Willits, CaliforniaMon, Dec 12, 9:19 PM PST · 15625 days ago · 7 km deep · 83 km away
26. 3.17 km W of Cobb, CaliforniaTue, Dec 13, 12:39 AM PST · 15625 days ago · 0 km deep · 0 km away
27. 2.07 km WSW of Cobb, CaliforniaTue, Dec 13, 11:42 AM PST · 15624 days ago · 0 km deep · 1 km away
28. 1.79 km ESE of Hidden Valley Lake, CaliforniaTue, Dec 13, 11:02 PM PST · 15624 days ago · 6 km deep · 31 km away
29. 1.56 km W of Cobb, CaliforniaWed, Dec 14, 6:51 AM PST · 15623 days ago · 3 km deep · 2 km away
30. 2.08 km WSW of Cobb, CaliforniaWed, Dec 14, 5:52 PM PST · 15623 days ago · 1 km deep · 2 km away
31. 1.55 km WSW of Cobb, CaliforniaWed, Dec 14, 10:09 PM PST · 15623 days ago · 1 km deep · 2 km away
32. 2.213 km ESE of Angwin, CaliforniaThu, Dec 15, 12:08 AM PST · 15623 days ago · -1 km deep · 53 km away
33. 1.58 km SW of Calistoga, CaliforniaThu, Dec 15, 2:40 AM PST · 15622 days ago · 6 km deep · 35 km away
34. 2.42 km SE of Clear Lake Riviera, CaliforniaThu, Dec 15, 2:47 AM PST · 15622 days ago · 1 km deep · 17 km away
35. 2.13 km SE of Clear Lake Riviera, CaliforniaThu, Dec 15, 4:07 AM PST · 15622 days ago · 2 km deep · 18 km away
36. 1.714 km SE of Laytonville, CaliforniaThu, Dec 15, 10:43 AM PST · 15622 days ago · 3 km deep · 100 km away
37. 1.65 km SW of Cobb, CaliforniaFri, Dec 16, 3:01 PM PST · 15621 days ago · 0 km deep · 4 km away
38. 1.77 km WSW of Cobb, CaliforniaFri, Dec 16, 9:03 PM PST · 15621 days ago · 1 km deep · 0 km away
39. 1.99 km WSW of Cobb, CaliforniaSat, Dec 17, 6:02 AM PST · 15620 days ago · 1 km deep · 2 km away
40. 2.06 km WSW of Cobb, CaliforniaSun, Dec 18, 3:58 PM PST · 15619 days ago · 2 km deep · 1 km away
41. 1.83 km E of Santa Rosa, CaliforniaSun, Dec 18, 9:36 PM PST · 15619 days ago · 8 km deep · 42 km away
42. 1.87 km WSW of Cobb, CaliforniaMon, Dec 19, 1:09 AM PST · 15619 days ago · 0 km deep · 1 km away
43. 1.76 km WSW of Cobb, CaliforniaMon, Dec 19, 5:11 AM PST · 15618 days ago · 3 km deep · 1 km away
44. 1.823 km ENE of Potter Valley, CaliforniaMon, Dec 19, 7:58 AM PST · 15618 days ago · 14 km deep · 66 km away
45. 1.59 km WSW of Cobb, CaliforniaTue, Dec 20, 7:04 AM PST · 15617 days ago · 1 km deep · 2 km away
46. 3.17 km W of Cobb, CaliforniaTue, Dec 20, 11:37 AM PST · 15617 days ago · 1 km deep · 0 km away
47. 1.76 km W of Cobb, CaliforniaTue, Dec 20, 5:56 PM PST · 15617 days ago · 3 km deep · 1 km away
48. 2.928 km WNW of Stonyford, CaliforniaWed, Dec 21, 4:16 AM PST · 15616 days ago · 4 km deep · 75 km away
49. 1.625 km NNE of Potter Valley, CaliforniaWed, Dec 21, 4:25 AM PST · 15616 days ago · 5 km deep · 82 km away
50. 1.66 km W of Cobb, CaliforniaWed, Dec 21, 4:34 AM PST · 15616 days ago · 3 km deep · 2 km away
51. 1.54 km NW of Redwood Valley, CaliforniaThu, Dec 22, 3:52 PM PST · 15615 days ago · 7 km deep · 66 km away
52. 1.84 km S of Cobb, CaliforniaThu, Dec 22, 7:28 PM PST · 15615 days ago · 1 km deep · 8 km away
53. 1.711 km NE of Healdsburg, CaliforniaFri, Dec 23, 1:31 AM PST · 15615 days ago · 5 km deep · 16 km away
54. 1.56 km W of Cobb, CaliforniaFri, Dec 23, 5:54 AM PST · 15614 days ago · 3 km deep · 2 km away
55. 2.47 km W of Cobb, CaliforniaFri, Dec 23, 10:24 AM PST · 15614 days ago · 2 km deep · 1 km away
56. 2.25 km WSW of Cobb, CaliforniaFri, Dec 23, 12:57 PM PST · 15614 days ago · 0 km deep · 2 km away
57. 2.36 km WSW of Cobb, CaliforniaFri, Dec 23, 12:58 PM PST · 15614 days ago · 0 km deep · 1 km away
58. 1.97 km WSW of Cobb, CaliforniaSat, Dec 24, 1:12 AM PST · 15614 days ago · 0 km deep · 1 km away
59. 2.26 km W of Cobb, CaliforniaSat, Dec 24, 4:32 PM PST · 15613 days ago · 3 km deep · 1 km away
60. 1.58 km WSW of Cobb, CaliforniaSun, Dec 25, 11:00 AM PST · 15612 days ago · 3 km deep · 1 km away

The first 60 of 171.

From the USGS Earthquake Hazards Program and its partner networks, event nc1107767. Read Tue, Sep 22, 2026, 9:37 PM UTC.