M1.9 earthquake 4 km WSW of Cobb, California

Magnitude

1.9 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Tue, Dec 25, 1979, 10:43 AM PST

UTC

1979-12-25 18:43:56 UTC

Depth

1.2 km (0.7 mi), shallow

Epicenter

38.803° N, 122.771° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.13

Depth from

From location

Station coverage gap

49°

Stations used

22

• Cobb, CaliforniaPopulation 1,778. Forecast5 kmWSW
• Clearlake, CaliforniaPopulation 15,182. Forecast21 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast40 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast665 kmNW

After

1. 2.07 km W of Cobb, CaliforniaWed, Dec 26, 2:24 AM PST · 17084 days ago · 1 km deep · 4 km away
2. 2.27 km W of Cobb, CaliforniaWed, Dec 26, 6:14 AM PST · 17084 days ago · 1 km deep · 4 km away
3. 2.05 km W of Brooktrails, CaliforniaWed, Dec 26, 9:32 AM PST · 17084 days ago · 5 km deep · 92 km away
4. 1.89 km NW of Montalvin, CaliforniaWed, Dec 26, 9:32 AM PST · 17084 days ago · 4 km deep · 89 km away
5. 2.24 km WSW of Cobb, CaliforniaWed, Dec 26, 4:43 PM PST · 17084 days ago · 2 km deep · 1 km away
6. 1.54 km WSW of Cobb, CaliforniaThu, Dec 27, 2:52 AM PST · 17083 days ago · 2 km deep · 0 km away
7. 2.07 km WSW of Cobb, CaliforniaThu, Dec 27, 6:18 AM PST · 17083 days ago · 0 km deep · 3 km away
8. 1.99 km WSW of Cobb, CaliforniaThu, Dec 27, 8:38 PM PST · 17083 days ago · 2 km deep · 5 km away
9. 2.16 km NNE of Healdsburg, CaliforniaSun, Dec 30, 8:17 AM PST · 17080 days ago · -1 km deep · 16 km away
10. 2.16 km W of Cobb, CaliforniaSun, Dec 30, 10:58 AM PST · 17080 days ago · 0 km deep · 3 km away
11. 2.06 km W of Cobb, CaliforniaSun, Dec 30, 1:15 PM PST · 17080 days ago · 3 km deep · 3 km away
12. 1.99 km WSW of Cobb, CaliforniaMon, Dec 31, 2:46 AM PST · 17079 days ago · 1 km deep · 5 km away
13. 1.77 km WSW of Cobb, CaliforniaMon, Dec 31, 5:08 AM PST · 17079 days ago · 1 km deep · 3 km away
14. 1.74 km WSW of Cobb, CaliforniaTue, Jan 1, 9:49 AM PST · 17078 days ago · 1 km deep · 0 km away
15. 2.07 km WSW of Cobb, CaliforniaThu, Jan 3, 2:25 AM PST · 17076 days ago · 2 km deep · 3 km away
16. 1.69 km SW of Hopland, CaliforniaThu, Jan 3, 5:53 PM PST · 17076 days ago · 1 km deep · 39 km away
17. 1.74 km WSW of Cobb, CaliforniaSat, Jan 5, 2:45 AM PST · 17074 days ago · 2 km deep · 0 km away
18. 1.721 km NNE of Upper Lake, CaliforniaSat, Jan 5, 3:39 AM PST · 17074 days ago · 4 km deep · 62 km away
19. 1.65 km SSW of Clear Lake Riviera, CaliforniaSun, Jan 6, 12:13 AM PST · 17073 days ago · 5 km deep · 11 km away
20. 1.64 km WSW of Cobb, CaliforniaTue, Jan 8, 8:45 AM PST · 17071 days ago · 1 km deep · 0 km away
21. 2.19 km WSW of Cobb, CaliforniaWed, Jan 9, 3:59 AM PST · 17070 days ago · 1 km deep · 5 km away
22. 1.74 km N of Lucerne, CaliforniaWed, Jan 9, 7:47 AM PST · 17070 days ago · 16 km deep · 37 km away
23. 3.06 km NE of Santa Rosa, CaliforniaWed, Jan 9, 11:53 AM PST · 17070 days ago · 7 km deep · 38 km away
24. 2.16 km NE of Santa Rosa, CaliforniaWed, Jan 9, 11:59 AM PST · 17070 days ago · 6 km deep · 38 km away
25. 1.85 km WSW of Cobb, CaliforniaWed, Jan 9, 2:55 PM PST · 17070 days ago · 0 km deep · 1 km away
26. 2.36 km W of Cobb, CaliforniaThu, Jan 10, 3:24 AM PST · 17069 days ago · 0 km deep · 3 km away
27. 2.023 km NNE of Potter Valley, CaliforniaThu, Jan 10, 10:04 AM PST · 17069 days ago · 9 km deep · 81 km away
28. 1.614 km ENE of Hidden Valley Lake, CaliforniaFri, Jan 11, 8:01 AM PST · 17068 days ago · 12 km deep · 32 km away
29. 1.67 km NE of Philo, CaliforniaSat, Jan 12, 12:13 PM PST · 17067 days ago · 0 km deep · 64 km away
30. 1.74 km WSW of Cobb, CaliforniaSat, Jan 12, 12:35 PM PST · 17067 days ago · 1 km deep · 0 km away
31. 3.111 km NNW of Potter Valley, CaliforniaMon, Jan 14, 12:54 AM PST · 17065 days ago · 12 km deep · 76 km away
32. 2.110 km NNW of Potter Valley, CaliforniaMon, Jan 14, 1:40 AM PST · 17065 days ago · 7 km deep · 76 km away
33. 1.63 km WNW of Clear Lake Riviera, CaliforniaMon, Jan 14, 8:08 PM PST · 17065 days ago · 10 km deep · 18 km away
34. 1.56 km WSW of Cobb, CaliforniaMon, Jan 14, 9:59 PM PST · 17064 days ago · 1 km deep · 2 km away
35. 1.77 km WSW of Cobb, CaliforniaMon, Jan 14, 11:36 PM PST · 17064 days ago · 0 km deep · 3 km away
36. 1.77 km WSW of Cobb, CaliforniaTue, Jan 15, 6:31 AM PST · 17064 days ago · 2 km deep · 3 km away
37. 1.7Northern CaliforniaTue, Jan 15, 1:33 PM PST · 17064 days ago · 8 km deep · 28 km away
38. 1.710 km E of Geyserville, CaliforniaWed, Jan 16, 11:25 AM PST · 17063 days ago · 15 km deep · 9 km away
39. 1.76 km W of Cobb, CaliforniaThu, Jan 17, 1:52 AM PST · 17062 days ago · 0 km deep · 2 km away
40. 1.66 km ENE of Willits, CaliforniaFri, Jan 18, 10:16 PM PST · 17060 days ago · 6 km deep · 82 km away
41. 3.210 km E of Manchester, CaliforniaSat, Jan 19, 9:05 AM PST · 17060 days ago · 9 km deep · 71 km away
42. 1.611 km NNW of Potter Valley, CaliforniaSat, Jan 19, 11:49 PM PST · 17059 days ago · 8 km deep · 76 km away
43. 1.67 km WSW of Cobb, CaliforniaSun, Jan 20, 1:20 AM PST · 17059 days ago · 2 km deep · 4 km away
44. 1.67 km WSW of Cobb, CaliforniaSun, Jan 20, 12:58 PM PST · 17059 days ago · 1 km deep · 3 km away
45. 1.56 km W of Cobb, CaliforniaTue, Jan 22, 4:36 PM PST · 17057 days ago · 1 km deep · 3 km away
46. 1.65 km SW of Cobb, CaliforniaWed, Jan 23, 11:20 AM PST · 17056 days ago · 1 km deep · 1 km away
47. 1.78 km W of Cobb, CaliforniaWed, Jan 23, 11:59 AM PST · 17056 days ago · 3 km deep · 5 km away
48. 2.05 km SW of Clear Lake Riviera, CaliforniaWed, Jan 23, 10:23 PM PST · 17055 days ago · 0 km deep · 13 km away
49. 1.75 km SW of Clear Lake Riviera, CaliforniaWed, Jan 23, 10:36 PM PST · 17055 days ago · -1 km deep · 13 km away
50. 1.85 km SW of Clear Lake Riviera, CaliforniaWed, Jan 23, 11:56 PM PST · 17055 days ago · 0 km deep · 13 km away
51. 1.74 km SW of Clear Lake Riviera, CaliforniaFri, Jan 25, 9:00 AM PST · 17054 days ago · 0 km deep · 14 km away
52. 1.77 km WSW of Cobb, CaliforniaFri, Jan 25, 9:26 AM PST · 17054 days ago · -1 km deep · 3 km away
53. 2.5Northern CaliforniaFri, Jan 25, 10:50 PM PST · 17053 days ago · 4 km deep · 3 km away
54. 1.96 km W of Cobb, CaliforniaFri, Jan 25, 10:51 PM PST · 17053 days ago · 3 km deep · 3 km away
55. 1.66 km W of Cobb, CaliforniaFri, Jan 25, 11:01 PM PST · 17053 days ago · 3 km deep · 3 km away
56. 2.06 km W of Cobb, CaliforniaFri, Jan 25, 11:14 PM PST · 17053 days ago · 3 km deep · 3 km away
57. 1.88 km W of Cobb, CaliforniaSat, Jan 26, 5:36 AM PST · 17053 days ago · 0 km deep · 4 km away
58. 2.74 km W of Lakeport, CaliforniaSun, Jan 27, 2:54 AM PST · 17052 days ago · 5 km deep · 32 km away
59. 1.94 km WSW of Cobb, CaliforniaSun, Jan 27, 11:31 AM PST · 17052 days ago · 2 km deep · 0 km away
60. 1.86 km WSW of Cobb, CaliforniaSun, Jan 27, 5:48 PM PST · 17052 days ago · 0 km deep · 2 km away

The first 60 of 116.

Before

1. 1.97 km WSW of Cobb, CaliforniaMon, Dec 24, 2:28 PM PST · 17086 days ago · 1 km deep · 3 km away
2. 1.57 km W of Cobb, CaliforniaMon, Dec 24, 8:29 AM PST · 17086 days ago · 0 km deep · 4 km away
3. 1.54 km WSW of Cobb, CaliforniaMon, Dec 24, 4:02 AM PST · 17086 days ago · 1 km deep · 0 km away
4. 1.75 km W of Cobb, CaliforniaMon, Dec 24, 3:35 AM PST · 17086 days ago · 1 km deep · 2 km away
5. 2.418 km E of Potter Valley, CaliforniaSun, Dec 23, 9:04 PM PST · 17087 days ago · 4 km deep · 60 km away
6. 1.76 km NNE of Dixon, CaliforniaSun, Dec 23, 4:01 AM PST · 17087 days ago · 10 km deep · 92 km away
7. 1.76 km W of Cobb, CaliforniaSat, Dec 22, 11:25 PM PST · 17087 days ago · 4 km deep · 3 km away
8. 1.89 km SE of Hopland, CaliforniaSat, Dec 22, 4:37 PM PST · 17088 days ago · 3 km deep · 26 km away
9. 1.67 km WSW of Cobb, CaliforniaSat, Dec 22, 4:27 PM PST · 17088 days ago · 2 km deep · 3 km away
10. 1.54 km WSW of Cobb, CaliforniaThu, Dec 20, 7:10 PM PST · 17090 days ago · 1 km deep · 0 km away
11. 1.86 km W of Cobb, CaliforniaThu, Dec 20, 7:43 AM PST · 17090 days ago · 1 km deep · 3 km away
12. 1.910 km ESE of Willits, CaliforniaThu, Dec 20, 5:23 AM PST · 17090 days ago · 11 km deep · 75 km away
13. 1.88 km W of Cobb, CaliforniaWed, Dec 19, 9:07 PM PST · 17091 days ago · 1 km deep · 4 km away
14. 2.48 km WSW of Cobb, CaliforniaWed, Dec 19, 9:03 PM PST · 17091 days ago · -1 km deep · 4 km away
15. 3.07 km WSW of Cobb, CaliforniaWed, Dec 19, 9:02 PM PST · 17091 days ago · 1 km deep · 3 km away
16. 1.68 km W of Cobb, CaliforniaWed, Dec 19, 5:41 AM PST · 17091 days ago · 1 km deep · 4 km away
17. 1.66 km WSW of Cobb, CaliforniaWed, Dec 19, 2:40 AM PST · 17091 days ago · 0 km deep · 2 km away
18. 1.97 km NNE of Black Point-Green Point, CaliforniaTue, Dec 18, 2:00 AM PST · 17092 days ago · 7 km deep · 74 km away
19. 2.64 km WSW of Cobb, CaliforniaMon, Dec 17, 10:00 PM PST · 17092 days ago · 4 km deep · 0 km away
20. 1.74 km WSW of Cobb, CaliforniaMon, Dec 17, 11:35 AM PST · 17093 days ago · 1 km deep · 0 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1049540. Read Sun, Oct 4, 2026, 5:02 PM UTC.