M1.8 earthquake 6 km W of Cobb, California

Magnitude

1.8 (md), micro

Local time

Sat, Nov 19, 1983, 9:55 AM PST

UTC

1983-11-19 17:55:00 UTC

Depth

3.1 km (1.9 mi), shallow

Epicenter

38.815° N, 122.796° 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

±0.13

Depth from

From location

Station coverage gap

68°

Stations used

15

• Cobb, CaliforniaPopulation 1,778. Forecast6 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast22 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast42 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast668 kmNW

After

1. 1.78 km W of Cobb, CaliforniaSat, Nov 26, 12:44 AM PST · 15641 days ago · -1 km deep · 2 km away
2. 1.67 km WSW of Cobb, CaliforniaSat, Nov 26, 12:45 AM PST · 15641 days ago · 1 km deep · 1 km away
3. 2.013 km NNE of Brooktrails, CaliforniaSat, Nov 26, 3:51 AM PST · 15641 days ago · 2 km deep · 96 km away
4. 1.67 km W of Cobb, CaliforniaSat, Nov 26, 5:46 AM PST · 15641 days ago · 1 km deep · 2 km away
5. 2.4Northern CaliforniaSat, Nov 26, 5:47 AM PST · 15641 days ago · 1 km deep · 2 km away
6. 1.78 km W of Cobb, CaliforniaSat, Nov 26, 5:47 AM PST · 15641 days ago · 1 km deep · 2 km away
7. 1.88 km W of Cobb, CaliforniaSat, Nov 26, 5:48 AM PST · 15641 days ago · -1 km deep · 2 km away
8. 3.06 km WSW of Cobb, CaliforniaSat, Nov 26, 11:53 AM PST · 15641 days ago · 3 km deep · 1 km away
9. 2.23 km S of Clear Lake Riviera, CaliforniaSat, Nov 26, 4:52 PM PST · 15640 days ago · 3 km deep · 13 km away
10. 2.66 km W of Cobb, CaliforniaSun, Nov 27, 7:59 AM PST · 15640 days ago · 0 km deep · 0 km away
11. 2.26 km W of Cobb, CaliforniaSun, Nov 27, 8:00 AM PST · 15640 days ago · 1 km deep · 0 km away
12. 1.62 km ESE of North Lakeport, CaliforniaSun, Nov 27, 5:16 PM PST · 15639 days ago · 18 km deep · 30 km away
13. 2.16 km W of Cobb, CaliforniaMon, Nov 28, 4:32 AM PST · 15639 days ago · 3 km deep · 1 km away
14. 2.36 km W of Cobb, CaliforniaMon, Nov 28, 4:36 AM PST · 15639 days ago · 3 km deep · 0 km away
15. 1.67 km W of Cobb, CaliforniaMon, Nov 28, 4:54 AM PST · 15639 days ago · 3 km deep · 1 km away
16. 2.16 km WSW of Cobb, CaliforniaMon, Nov 28, 10:37 AM PST · 15639 days ago · 1 km deep · 1 km away
17. 1.919 km ENE of Potter Valley, CaliforniaMon, Nov 28, 10:43 AM PST · 15639 days ago · 7 km deep · 62 km away
18. 1.51 km NNW of Calpella, CaliforniaMon, Nov 28, 12:02 PM PST · 15639 days ago · 6 km deep · 60 km away
19. 1.67 km W of Cobb, CaliforniaMon, Nov 28, 6:46 PM PST · 15638 days ago · 0 km deep · 1 km away
20. 1.612 km NNW of Moskowite Corner, CaliforniaTue, Nov 29, 8:46 PM PST · 15637 days ago · 18 km deep · 58 km away
21. 1.57 km W of Cobb, CaliforniaWed, Nov 30, 4:06 PM PST · 15636 days ago · 3 km deep · 1 km away
22. 2.68 km E of Willits, CaliforniaWed, Nov 30, 4:32 PM PST · 15636 days ago · 4 km deep · 76 km away
23. 1.67 km W of Cobb, CaliforniaWed, Nov 30, 4:51 PM PST · 15636 days ago · 3 km deep · 1 km away
24. 1.63 km ESE of Moskowite Corner, CaliforniaThu, Dec 1, 3:18 AM PST · 15636 days ago · 7 km deep · 70 km away
25. 2.13 km SE of Calpella, CaliforniaThu, Dec 1, 10:56 AM PST · 15636 days ago · 2 km deep · 56 km away
26. 2.12 km SE of Calpella, CaliforniaThu, Dec 1, 4:18 PM PST · 15635 days ago · 5 km deep · 56 km away
27. 1.620 km NE of Potter Valley, CaliforniaFri, Dec 2, 1:33 AM PST · 15635 days ago · 10 km deep · 72 km away
28. 1.817 km E of Lower Lake, CaliforniaFri, Dec 2, 4:54 PM PST · 15634 days ago · 3 km deep · 36 km away
29. 1.95 km WSW of Cobb, CaliforniaSat, Dec 3, 1:27 AM PST · 15634 days ago · -1 km deep · 2 km away
30. 2.04 km SW of Cobb, CaliforniaSat, Dec 3, 1:47 AM PST · 15634 days ago · 1 km deep · 3 km away
31. 2.05 km WSW of Cobb, CaliforniaSat, Dec 3, 1:52 AM PST · 15634 days ago · 0 km deep · 2 km away
32. 1.97 km E of Penngrove, CaliforniaSat, Dec 3, 2:21 AM PST · 15634 days ago · 4 km deep · 61 km away
33. 1.77 km W of Cobb, CaliforniaSat, Dec 3, 6:33 PM PST · 15633 days ago · 2 km deep · 1 km away
34. 1.94 km W of Cobb, CaliforniaSat, Dec 3, 6:39 PM PST · 15633 days ago · -1 km deep · 2 km away
35. 1.76 km W of Cobb, CaliforniaSat, Dec 3, 9:05 PM PST · 15633 days ago · 2 km deep · 2 km away
36. 1.66 km W of Cobb, CaliforniaSun, Dec 4, 12:43 PM PST · 15633 days ago · 3 km deep · 0 km away
37. 2.45 km E of Willits, CaliforniaSun, Dec 4, 4:19 PM PST · 15632 days ago · 4 km deep · 80 km away
38. 2.45 km ENE of Willits, CaliforniaSun, Dec 4, 11:03 PM PST · 15632 days ago · 2 km deep · 80 km away
39. 1.78 km N of Princeton, CaliforniaMon, Dec 5, 12:18 AM PST · 15632 days ago · 24 km deep · 100 km away
40. 1.56 km W of Cobb, CaliforniaMon, Dec 5, 2:55 AM PST · 15632 days ago · 3 km deep · 1 km away
41. 1.76 km W of Cobb, CaliforniaMon, Dec 5, 5:00 AM PST · 15632 days ago · 3 km deep · 1 km away
42. 1.77 km WSW of Cobb, CaliforniaMon, Dec 5, 10:28 AM PST · 15632 days ago · 1 km deep · 1 km away
43. 1.67 km W of Cobb, CaliforniaTue, Dec 6, 7:24 AM PST · 15631 days ago · 3 km deep · 1 km away
44. 1.57 km E of Willits, CaliforniaTue, Dec 6, 12:09 PM PST · 15631 days ago · 9 km deep · 77 km away
45. 1.57 km W of Cobb, CaliforniaTue, Dec 6, 6:36 PM PST · 15630 days ago · 3 km deep · 1 km away
46. 1.76 km W of Cobb, CaliforniaTue, Dec 6, 6:55 PM PST · 15630 days ago · 3 km deep · 1 km away
47. 1.714 km NNE of Angwin, CaliforniaTue, Dec 6, 7:42 PM PST · 15630 days ago · 9 km deep · 38 km away
48. 1.68 km W of Cobb, CaliforniaWed, Dec 7, 3:44 AM PST · 15630 days ago · 0 km deep · 3 km away
49. 2.76 km WSW of Cobb, CaliforniaWed, Dec 7, 8:10 AM PST · 15630 days ago · 0 km deep · 2 km away
50. 1.6Northern CaliforniaWed, Dec 7, 9:43 AM PST · 15630 days ago · 1 km deep · 9 km away
51. 1.77 km WSW of Cobb, CaliforniaThu, Dec 8, 12:52 AM PST · 15629 days ago · 0 km deep · 1 km away
52. 1.87 km WSW of Cobb, CaliforniaThu, Dec 8, 1:11 AM PST · 15629 days ago · -1 km deep · 2 km away
53. 1.918 km E of Potter Valley, CaliforniaThu, Dec 8, 3:53 AM PST · 15629 days ago · 8 km deep · 59 km away
54. 2.47 km WSW of Cobb, CaliforniaThu, Dec 8, 9:03 PM PST · 15628 days ago · 0 km deep · 2 km away
55. 2.28 km WSW of Cobb, CaliforniaFri, Dec 9, 5:59 AM PST · 15628 days ago · 3 km deep · 3 km away
56. 1.77 km WSW of Cobb, CaliforniaFri, Dec 9, 9:16 AM PST · 15628 days ago · 0 km deep · 1 km away
57. 2.67 km WSW of Cobb, CaliforniaFri, Dec 9, 9:32 AM PST · 15628 days ago · 1 km deep · 1 km away
58. 1.77 km WSW of Cobb, CaliforniaFri, Dec 9, 2:15 PM PST · 15628 days ago · 1 km deep · 2 km away
59. 1.85 km SSW of Cobb, CaliforniaFri, Dec 9, 3:31 PM PST · 15628 days ago · -1 km deep · 6 km away
60. 2.86 km W of Cobb, CaliforniaFri, Dec 9, 9:50 PM PST · 15627 days ago · 3 km deep · 0 km away

The first 60 of 176.

From the USGS Earthquake Hazards Program and its partner networks, event nc1107153. Read Tue, Sep 22, 2026, 11:18 AM UTC.