M2.1 earthquake 4 km WSW of Cobb, California

Magnitude

2.1 (md), micro

Local time

Tue, Mar 13, 1979, 8:23 AM PST

UTC

1979-03-13 16:23:19 UTC

Depth

0.7 km (0.5 mi), shallow

Epicenter

38.802° N, 122.770° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.17

Depth from

From location

Station coverage gap

66°

Stations used

16

• 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. 2.38 km ENE of Lower Lake, CaliforniaTue, Mar 13, 10:19 AM PST · 17360 days ago · 9 km deep · 27 km away
2. 1.55 km SSE of Moskowite Corner, CaliforniaWed, Mar 14, 5:12 PM PST · 17359 days ago · 5 km deep · 69 km away
3. 2.315 km E of Angwin, CaliforniaThu, Mar 15, 9:02 PM PST · 17358 days ago · 2 km deep · 50 km away
4. 1.916 km E of Potter Valley, CaliforniaFri, Mar 16, 2:27 PM PST · 17357 days ago · 2 km deep · 61 km away
5. 2.04 km WSW of Cobb, CaliforniaFri, Mar 16, 7:29 PM PST · 17357 days ago · 4 km deep · 1 km away
6. 2.110 km NNE of Brooktrails, CaliforniaSat, Mar 17, 11:06 AM PST · 17356 days ago · 8 km deep · 94 km away
7. 2.17 km W of Cobb, CaliforniaSat, Mar 17, 1:18 PM PST · 17356 days ago · 3 km deep · 4 km away
8. 2.13 km ESE of Calpella, CaliforniaSat, Mar 17, 8:05 PM PST · 17356 days ago · 6 km deep · 58 km away
9. 1.813 km E of Hidden Valley Lake, CaliforniaSun, Mar 18, 11:03 PM PST · 17355 days ago · 8 km deep · 31 km away
10. 2.16 km WSW of Cobb, CaliforniaMon, Mar 19, 2:52 AM PST · 17354 days ago · 1 km deep · 2 km away
11. 2.86 km W of Cobb, CaliforniaMon, Mar 19, 2:59 AM PST · 17354 days ago · 3 km deep · 3 km away
12. 2.015 km NNE of Angwin, CaliforniaWed, Mar 21, 5:11 AM PST · 17352 days ago · 11 km deep · 36 km away
13. 1.614 km NNE of Angwin, CaliforniaWed, Mar 21, 6:59 AM PST · 17352 days ago · 4 km deep · 36 km away
14. 1.99 km SSE of Hopland, CaliforniaWed, Mar 21, 4:31 PM PST · 17352 days ago · 5 km deep · 28 km away
15. 1.74 km WSW of Cobb, CaliforniaWed, Mar 21, 5:59 PM PST · 17352 days ago · 1 km deep · 0 km away
16. 1.96 km N of Cloverdale, CaliforniaThu, Mar 22, 6:06 AM PST · 17351 days ago · 6 km deep · 22 km away
17. 2.06 km N of Cloverdale, CaliforniaThu, Mar 22, 6:12 AM PST · 17351 days ago · 5 km deep · 22 km away
18. 2.2Northern CaliforniaThu, Mar 22, 3:20 PM PST · 17351 days ago · -1 km deep · 55 km away
19. 1.916 km WSW of Guinda, CaliforniaThu, Mar 22, 11:01 PM PST · 17351 days ago · 5 km deep · 35 km away
20. 1.65 km ESE of Clearlake Oaks, CaliforniaSat, Mar 24, 9:37 AM PST · 17349 days ago · 2 km deep · 27 km away
21. 2.16 km W of Cobb, CaliforniaSat, Mar 24, 6:54 PM PST · 17349 days ago · 4 km deep · 3 km away
22. 1.85 km SE of Santa Rosa, CaliforniaSat, Mar 24, 11:27 PM PST · 17349 days ago · 10 km deep · 44 km away
23. 1.98 km NNE of Hopland, CaliforniaSun, Mar 25, 4:50 AM PST · 17348 days ago · 2 km deep · 38 km away
24. 1.88 km NNE of Hopland, CaliforniaSun, Mar 25, 4:54 AM PST · 17348 days ago · 0 km deep · 39 km away
25. 2.319 km NE of Upper Lake, CaliforniaSun, Mar 25, 10:40 AM PST · 17348 days ago · 8 km deep · 56 km away
26. 1.86 km ENE of Brooktrails, CaliforniaMon, Mar 26, 1:54 PM PST · 17347 days ago · 4 km deep · 87 km away
27. 1.70 km NNE of Larkfield-Wikiup, CaliforniaWed, Mar 28, 10:28 PM PST · 17345 days ago · 4 km deep · 32 km away
28. 1.58 km WSW of Cobb, CaliforniaThu, Mar 29, 12:09 AM PST · 17345 days ago · 4 km deep · 4 km away
29. 1.69 km E of Willits, CaliforniaThu, Mar 29, 3:23 AM PST · 17344 days ago · 4 km deep · 78 km away
30. 1.65 km ENE of Lucerne, CaliforniaFri, Mar 30, 6:38 AM PST · 17343 days ago · 8 km deep · 34 km away
31. 1.53 km ESE of Calpella, CaliforniaSun, Apr 1, 8:00 PM PST · 17341 days ago · 5 km deep · 57 km away
32. 1.75 km NE of Nice, CaliforniaSun, Apr 1, 11:43 PM PST · 17341 days ago · 9 km deep · 40 km away
33. 2.13 km ESE of Calpella, CaliforniaMon, Apr 2, 1:18 PM PST · 17340 days ago · 6 km deep · 58 km away
34. 2.17 km SSE of Potter Valley, CaliforniaMon, Apr 2, 1:18 PM PST · 17340 days ago · 41 km deep · 57 km away
35. 1.53 km ESE of Calpella, CaliforniaMon, Apr 2, 1:19 PM PST · 17340 days ago · 6 km deep · 58 km away
36. 1.65 km SSW of Woodland, CaliforniaTue, Apr 3, 2:30 AM PST · 17339 days ago · 6 km deep · 86 km away
37. 1.710 km NNW of Potter Valley, CaliforniaTue, Apr 3, 9:26 AM PST · 17339 days ago · 4 km deep · 76 km away
38. 1.912 km NNW of Potter Valley, CaliforniaTue, Apr 3, 9:40 AM PST · 17339 days ago · 12 km deep · 78 km away
39. 1.64 km SSE of Hopland, CaliforniaTue, Apr 3, 3:18 PM PST · 17339 days ago · 7 km deep · 32 km away
40. 2.03 km ESE of Talmage, CaliforniaTue, Apr 3, 8:41 PM PST · 17339 days ago · 3 km deep · 47 km away
41. 1.95 km WSW of Cobb, CaliforniaWed, Apr 4, 10:16 AM PST · 17338 days ago · 0 km deep · 1 km away
42. 1.55 km WSW of Cobb, CaliforniaWed, Apr 4, 11:24 AM PST · 17338 days ago · 0 km deep · 2 km away
43. 2.46 km ENE of Vallejo, CaliforniaMon, Apr 9, 3:59 PM PST · 17333 days ago · 0 km deep · 92 km away
44. 1.66 km WSW of Cobb, CaliforniaThu, Apr 12, 5:53 PM PST · 17330 days ago · 0 km deep · 2 km away
45. 2.68 km WSW of Cobb, CaliforniaSun, Apr 15, 5:02 AM PST · 17327 days ago · 4 km deep · 4 km away
46. 1.58 km WSW of Cobb, CaliforniaSun, Apr 15, 1:25 PM PST · 17327 days ago · 4 km deep · 3 km away
47. 1.95 km ESE of Clearlake Oaks, CaliforniaSun, Apr 15, 3:10 PM PST · 17327 days ago · 2 km deep · 27 km away
48. 2.06 km WSW of Cobb, CaliforniaSun, Apr 15, 11:30 PM PST · 17327 days ago · 4 km deep · 3 km away
49. 1.710 km NW of Moskowite Corner, CaliforniaMon, Apr 16, 5:06 AM PST · 17326 days ago · 5 km deep · 53 km away
50. 1.84 km ENE of Saint Helena, CaliforniaMon, Apr 16, 6:15 AM PST · 17326 days ago · 10 km deep · 44 km away
51. 2.57 km WSW of Cobb, CaliforniaThu, Apr 19, 7:34 AM PST · 17323 days ago · 3 km deep · 3 km away
52. 1.910 km NNW of Potter Valley, CaliforniaSat, Apr 21, 1:59 PM PST · 17321 days ago · 4 km deep · 76 km away
53. 1.610 km SE of Boonville, CaliforniaTue, Apr 24, 7:45 AM PST · 17318 days ago · 1 km deep · 48 km away
54. 2.16 km WSW of Calistoga, CaliforniaWed, Apr 25, 8:14 PM PST · 17317 days ago · 5 km deep · 30 km away
55. 2.10 km N of Hopland, CaliforniaFri, Apr 27, 12:25 AM PST · 17316 days ago · 7 km deep · 36 km away
56. 2.46 km W of Cobb, CaliforniaSat, Apr 28, 5:16 PM PST · 17314 days ago · 1 km deep · 4 km away
57. 1.99 km W of Cobb, CaliforniaTue, May 1, 4:26 AM PDT · 17311 days ago · 1 km deep · 5 km away
58. 2.411 km E of Comptche, CaliforniaTue, May 1, 2:53 PM PDT · 17311 days ago · 13 km deep · 79 km away
59. 1.714 km NNW of Potter Valley, CaliforniaTue, May 1, 11:34 PM PDT · 17311 days ago · 4 km deep · 80 km away
60. 3.06 km W of Cobb, CaliforniaWed, May 2, 1:50 AM PDT · 17311 days ago · 1 km deep · 3 km away

The first 60 of 66.

Before

1. 1.711 km E of Lower Lake, CaliforniaTue, Mar 13, 7:18 AM PST · 17360 days ago · 15 km deep · 29 km away
2. 2.617 km NNE of Nice, CaliforniaSun, Mar 11, 8:31 AM PST · 17362 days ago · 4 km deep · 50 km away
3. 2.816 km NNE of Nice, CaliforniaSat, Mar 10, 5:30 AM PST · 17363 days ago · 7 km deep · 50 km away
4. 2.68 km WSW of Cobb, CaliforniaFri, Mar 9, 4:45 PM PST · 17364 days ago · 3 km deep · 4 km away
5. 1.86 km WSW of Cobb, CaliforniaFri, Mar 9, 2:23 AM PST · 17364 days ago · 1 km deep · 2 km away
6. 2.323 km NE of Potter Valley, CaliforniaThu, Mar 8, 6:59 PM PST · 17365 days ago · 10 km deep · 78 km away
7. 2.07 km NNW of Redwood Valley, CaliforniaThu, Mar 8, 3:30 PM PST · 17365 days ago · 7 km deep · 71 km away
8. 2.42 km ESE of Calpella, CaliforniaWed, Mar 7, 2:06 PM PST · 17366 days ago · 6 km deep · 58 km away
9. 1.87 km W of Cobb, CaliforniaMon, Mar 5, 12:47 PM PST · 17368 days ago · 0 km deep · 4 km away
10. 2.32 km SSW of Monument Hills, CaliforniaSun, Mar 4, 8:38 PM PST · 17369 days ago · 9 km deep · 78 km away
11. 2.06 km ESE of Willits, CaliforniaSun, Mar 4, 2:43 PM PST · 17369 days ago · 10 km deep · 79 km away
12. 2.37 km W of Cobb, CaliforniaSat, Mar 3, 4:33 PM PST · 17370 days ago · 3 km deep · 4 km away
13. 1.86 km E of Woodland, CaliforniaFri, Mar 2, 1:00 AM PST · 17372 days ago · 12 km deep · 94 km away
14. 2.46 km W of Cobb, CaliforniaThu, Mar 1, 12:57 PM PST · 17372 days ago · 4 km deep · 4 km away
15. 2.07 km ENE of Brooktrails, CaliforniaWed, Feb 28, 5:08 AM PST · 17373 days ago · 5 km deep · 87 km away
16. 2.3Northern CaliforniaMon, Feb 26, 10:33 PM PST · 17375 days ago · 4 km deep · 3 km away
17. 1.78 km WSW of Cobb, CaliforniaMon, Feb 26, 4:22 AM PST · 17375 days ago · 3 km deep · 4 km away
18. 2.86 km W of Cobb, CaliforniaSun, Feb 25, 6:17 PM PST · 17376 days ago · 3 km deep · 3 km away
19. 2.313 km NNE of Brooktrails, CaliforniaSun, Feb 25, 2:14 PM PST · 17376 days ago · 7 km deep · 98 km away
20. 2.28 km W of Cobb, CaliforniaSun, Feb 25, 6:15 AM PST · 17376 days ago · 1 km deep · 4 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1044993. Read Tue, Sep 22, 2026, 9:39 PM UTC.