M2.5 earthquake 7 km WSW of Cobb, California

Magnitude

2.5 (md), micro

Local time

Thu, Apr 19, 1979, 7:34 AM PST

UTC

1979-04-19 15:34:28 UTC

Depth

2.6 km (1.6 mi), shallow

Epicenter

38.804° N, 122.807° 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

±0.12

Depth from

From location

Station coverage gap

45°

Stations used

25

• Cobb, CaliforniaPopulation 1,778. Forecast8 kmWSW
• Healdsburg, CaliforniaPopulation 11,742. Forecast22 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast41 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast667 kmNW

After

1. 1.910 km NNW of Potter Valley, CaliforniaSat, Apr 21, 1:59 PM PST · 17321 days ago · 4 km deep · 74 km away
2. 1.610 km SE of Boonville, CaliforniaTue, Apr 24, 7:45 AM PST · 17318 days ago · 1 km deep · 45 km away
3. 2.16 km WSW of Calistoga, CaliforniaWed, Apr 25, 8:14 PM PST · 17317 days ago · 5 km deep · 31 km away
4. 2.10 km N of Hopland, CaliforniaFri, Apr 27, 12:25 AM PST · 17316 days ago · 7 km deep · 33 km away
5. 2.46 km W of Cobb, CaliforniaSat, Apr 28, 5:16 PM PST · 17314 days ago · 1 km deep · 2 km away
6. 1.99 km W of Cobb, CaliforniaTue, May 1, 4:26 AM PDT · 17311 days ago · 1 km deep · 3 km away
7. 2.411 km E of Comptche, CaliforniaTue, May 1, 2:53 PM PDT · 17311 days ago · 13 km deep · 77 km away
8. 1.714 km NNW of Potter Valley, CaliforniaTue, May 1, 11:34 PM PDT · 17311 days ago · 4 km deep · 78 km away
9. 3.06 km W of Cobb, CaliforniaWed, May 2, 1:50 AM PDT · 17311 days ago · 1 km deep · 3 km away
10. 1.56 km WSW of Cobb, CaliforniaSat, May 5, 1:02 PM PDT · 17307 days ago · 1 km deep · 1 km away
11. 1.94 km WSW of Guinda, CaliforniaSun, May 6, 11:02 AM PDT · 17306 days ago · 43 km deep · 49 km away
12. 1.610 km E of Hidden Valley Lake, CaliforniaWed, May 9, 8:27 AM PDT · 17303 days ago · 10 km deep · 32 km away
13. 1.64 km WSW of Cobb, CaliforniaFri, May 11, 2:25 PM PDT · 17301 days ago · 1 km deep · 3 km away
14. 1.65 km WSW of Cobb, CaliforniaFri, May 11, 4:16 PM PDT · 17301 days ago · 0 km deep · 2 km away
15. 2.22 km NNE of Deer Park, CaliforniaFri, May 11, 7:45 PM PDT · 17301 days ago · 11 km deep · 41 km away
16. 2.33 km WSW of Cobb, CaliforniaSun, May 13, 7:11 AM PDT · 17299 days ago · 2 km deep · 4 km away
17. 1.87 km W of Cobb, CaliforniaTue, May 15, 6:39 PM PDT · 17297 days ago · 1 km deep · 1 km away
18. 2.27 km W of Cobb, CaliforniaThu, May 17, 2:32 AM PDT · 17296 days ago · 3 km deep · 2 km away
19. 2.28 km WSW of Cobb, CaliforniaSat, May 19, 4:08 PM PDT · 17293 days ago · 1 km deep · 1 km away
20. 2.913 km NW of Moskowite Corner, CaliforniaSun, May 20, 4:35 AM PDT · 17292 days ago · 11 km deep · 54 km away
21. 2.35 km SSW of Calistoga, CaliforniaSun, May 20, 4:44 AM PDT · 17292 days ago · 3 km deep · 35 km away
22. 2.13 km SSW of Green Valley, CaliforniaMon, May 21, 5:27 AM PDT · 17291 days ago · 10 km deep · 85 km away
23. 1.78 km W of Cobb, CaliforniaTue, May 22, 1:25 AM PDT · 17291 days ago · 0 km deep · 2 km away
24. 1.58 km WNW of Hopland, CaliforniaThu, May 24, 1:39 AM PDT · 17289 days ago · 2 km deep · 41 km away
25. 1.89 km W of Cobb, CaliforniaFri, May 25, 5:50 AM PDT · 17287 days ago · 0 km deep · 3 km away
26. 1.923 km ENE of Potter Valley, CaliforniaFri, May 25, 9:29 AM PDT · 17287 days ago · 9 km deep · 67 km away
27. 1.86 km WNW of Cloverdale, CaliforniaSun, May 27, 2:27 AM PDT · 17286 days ago · 42 km deep · 24 km away
28. 2.74 km WSW of Cobb, CaliforniaSun, May 27, 7:37 PM PDT · 17285 days ago · 1 km deep · 3 km away
29. 2.77 km WSW of Cobb, CaliforniaSun, May 27, 10:28 PM PDT · 17285 days ago · 1 km deep · 0 km away
30. 2.29 km NNW of Moskowite Corner, CaliforniaTue, May 29, 12:32 AM PDT · 17284 days ago · 16 km deep · 58 km away
31. 1.67 km WSW of Cobb, CaliforniaWed, May 30, 4:34 AM PDT · 17282 days ago · 2 km deep · 0 km away
32. 1.93 km ESE of Kenwood, CaliforniaThu, May 31, 3:09 PM PDT · 17281 days ago · 9 km deep · 52 km away
33. 2.36 km S of Clear Lake Riviera, CaliforniaFri, Jun 1, 3:41 AM PDT · 17280 days ago · 2 km deep · 12 km away
34. 1.74 km NE of Larkfield-Wikiup, CaliforniaFri, Jun 1, 5:28 AM PDT · 17280 days ago · 3 km deep · 30 km away
35. 1.84 km NNE of Larkfield-Wikiup, CaliforniaFri, Jun 1, 6:14 AM PDT · 17280 days ago · 3 km deep · 28 km away
36. 1.67 km W of Cobb, CaliforniaFri, Jun 1, 8:15 AM PDT · 17280 days ago · 3 km deep · 2 km away
37. 1.75 km WSW of Cobb, CaliforniaSat, Jun 2, 7:59 PM PDT · 17279 days ago · 0 km deep · 2 km away
38. 1.54 km WSW of Cobb, CaliforniaMon, Jun 4, 11:30 AM PDT · 17277 days ago · 1 km deep · 3 km away
39. 1.7Northern CaliforniaFri, Jun 8, 11:28 PM PDT · 17273 days ago · 2 km deep · 0 km away
40. 1.67 km WSW of Cobb, CaliforniaSat, Jun 9, 11:06 AM PDT · 17272 days ago · 1 km deep · 0 km away
41. 1.68 km SW of Cloverdale, CaliforniaMon, Jun 11, 6:43 PM PDT · 17270 days ago · 3 km deep · 25 km away
42. 2.713 km NNW of Brooktrails, CaliforniaWed, Jun 13, 10:00 PM PDT · 17268 days ago · 2 km deep · 99 km away
43. 1.95 km NW of Potter Valley, CaliforniaThu, Jun 14, 1:44 PM PDT · 17267 days ago · 4 km deep · 69 km away
44. 2.74 km S of Suisun, CaliforniaThu, Jun 14, 4:55 PM PDT · 17267 days ago · 37 km deep · 95 km away
45. 1.62 km NNE of Talmage, CaliforniaThu, Jun 14, 5:33 PM PDT · 17267 days ago · 6 km deep · 49 km away
46. 2.13 km SE of Calpella, CaliforniaFri, Jun 15, 9:44 AM PDT · 17266 days ago · 4 km deep · 56 km away
47. 2.012 km NW of Moskowite Corner, CaliforniaSat, Jun 16, 12:42 PM PDT · 17265 days ago · 16 km deep · 55 km away
48. 1.68 km WSW of Cobb, CaliforniaSat, Jun 16, 6:21 PM PDT · 17265 days ago · 4 km deep · 1 km away
49. 2.77 km WSW of Cobb, CaliforniaSat, Jun 16, 7:15 PM PDT · 17265 days ago · 0 km deep · 0 km away
50. 1.65 km NNE of Geyserville, CaliforniaSat, Jun 16, 7:15 PM PDT · 17265 days ago · -1 km deep · 9 km away
51. 2.43 km NW of Redwood Valley, CaliforniaSun, Jun 17, 7:26 PM PDT · 17264 days ago · 2 km deep · 65 km away
52. 1.63 km NW of Moskowite Corner, CaliforniaMon, Jun 18, 2:08 AM PDT · 17264 days ago · 11 km deep · 63 km away

Before

1. 1.84 km ENE of Saint Helena, CaliforniaMon, Apr 16, 6:15 AM PST · 17326 days ago · 10 km deep · 46 km away
2. 1.710 km NW of Moskowite Corner, CaliforniaMon, Apr 16, 5:06 AM PST · 17326 days ago · 5 km deep · 56 km away
3. 2.06 km WSW of Cobb, CaliforniaSun, Apr 15, 11:30 PM PST · 17327 days ago · 4 km deep · 1 km away
4. 1.95 km ESE of Clearlake Oaks, CaliforniaSun, Apr 15, 3:10 PM PST · 17327 days ago · 2 km deep · 29 km away
5. 1.58 km WSW of Cobb, CaliforniaSun, Apr 15, 1:25 PM PST · 17327 days ago · 4 km deep · 1 km away
6. 2.68 km WSW of Cobb, CaliforniaSun, Apr 15, 5:02 AM PST · 17327 days ago · 4 km deep · 1 km away
7. 1.66 km WSW of Cobb, CaliforniaThu, Apr 12, 5:53 PM PST · 17330 days ago · 0 km deep · 1 km away
8. 2.46 km ENE of Vallejo, CaliforniaMon, Apr 9, 3:59 PM PST · 17333 days ago · 0 km deep · 93 km away
9. 1.55 km WSW of Cobb, CaliforniaWed, Apr 4, 11:24 AM PST · 17338 days ago · 0 km deep · 2 km away
10. 1.95 km WSW of Cobb, CaliforniaWed, Apr 4, 10:16 AM PST · 17338 days ago · 0 km deep · 2 km away
11. 2.03 km ESE of Talmage, CaliforniaTue, Apr 3, 8:41 PM PST · 17339 days ago · 3 km deep · 45 km away
12. 1.64 km SSE of Hopland, CaliforniaTue, Apr 3, 3:18 PM PST · 17339 days ago · 7 km deep · 29 km away
13. 1.912 km NNW of Potter Valley, CaliforniaTue, Apr 3, 9:40 AM PST · 17339 days ago · 12 km deep · 76 km away
14. 1.710 km NNW of Potter Valley, CaliforniaTue, Apr 3, 9:26 AM PST · 17339 days ago · 4 km deep · 74 km away
15. 1.65 km SSW of Woodland, CaliforniaTue, Apr 3, 2:30 AM PST · 17339 days ago · 6 km deep · 89 km away
16. 1.53 km ESE of Calpella, CaliforniaMon, Apr 2, 1:19 PM PST · 17340 days ago · 6 km deep · 56 km away
17. 2.17 km SSE of Potter Valley, CaliforniaMon, Apr 2, 1:18 PM PST · 17340 days ago · 41 km deep · 56 km away
18. 2.13 km ESE of Calpella, CaliforniaMon, Apr 2, 1:18 PM PST · 17340 days ago · 6 km deep · 56 km away
19. 1.75 km NE of Nice, CaliforniaSun, Apr 1, 11:43 PM PST · 17341 days ago · 9 km deep · 40 km away
20. 1.53 km ESE of Calpella, CaliforniaSun, Apr 1, 8:00 PM PST · 17341 days ago · 5 km deep · 56 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1045477. Read Tue, Sep 22, 2026, 9:37 PM UTC.