M2.0 earthquake 5 km SW of Cobb, California

Magnitude

2.0 (md), micro

Local time

Tue, Aug 28, 1984, 2:55 AM PDT

UTC

1984-08-28 09:55:10 UTC

Depth

-0.0 km (-0.0 mi), shallow

Epicenter

38.793° N, 122.776° 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

±0.10

Depth from

From location

Station coverage gap

53°

Stations used

19

• Cobb, CaliforniaPopulation 1,778. Forecast6 kmSW
• Healdsburg, CaliforniaPopulation 11,742. Forecast22 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast39 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast665 kmNW

After

1. 2.66 km WSW of Cobb, CaliforniaTue, Aug 28, 3:18 AM PDT · 15373 days ago · -1 km deep · 1 km away
2. 2.823 km NNE of Potter Valley, CaliforniaTue, Aug 28, 5:52 AM PDT · 15373 days ago · 4 km deep · 82 km away
3. 2.13 km W of Cloverdale, CaliforniaTue, Aug 28, 8:14 AM PDT · 15373 days ago · 17 km deep · 25 km away
4. 1.76 km WSW of Cobb, CaliforniaTue, Aug 28, 8:25 AM PDT · 15373 days ago · 3 km deep · 2 km away
5. 1.76 km WSW of Cobb, CaliforniaTue, Aug 28, 8:30 AM PDT · 15373 days ago · 3 km deep · 3 km away
6. 1.78 km NNE of Hopland, CaliforniaTue, Aug 28, 4:38 PM PDT · 15372 days ago · 0 km deep · 39 km away
7. 2.46 km WSW of Cobb, CaliforniaTue, Aug 28, 5:03 PM PDT · 15372 days ago · 3 km deep · 2 km away
8. 1.66 km WSW of Cobb, CaliforniaTue, Aug 28, 5:05 PM PDT · 15372 days ago · 3 km deep · 2 km away
9. 1.610 km SW of Hopland, CaliforniaTue, Aug 28, 11:00 PM PDT · 15372 days ago · 4 km deep · 40 km away
10. 2.010 km WSW of Cobb, CaliforniaWed, Aug 29, 12:03 PM PDT · 15371 days ago · 2 km deep · 6 km away
11. 1.710 km WSW of Cobb, CaliforniaWed, Aug 29, 12:03 PM PDT · 15371 days ago · 2 km deep · 6 km away
12. 1.51 km NNW of Calpella, CaliforniaWed, Aug 29, 5:20 PM PDT · 15371 days ago · 6 km deep · 63 km away
13. 2.022 km SSE of Covelo, CaliforniaWed, Aug 29, 5:58 PM PDT · 15371 days ago · 3 km deep · 97 km away
14. 1.919 km NNE of Upper Lake, CaliforniaThu, Aug 30, 3:54 AM PDT · 15371 days ago · 5 km deep · 60 km away
15. 2.04 km NE of Clearlake, CaliforniaThu, Aug 30, 9:38 AM PDT · 15371 days ago · 2 km deep · 27 km away
16. 1.58 km W of Cobb, CaliforniaThu, Aug 30, 11:10 AM PDT · 15370 days ago · 1 km deep · 4 km away
17. 1.57 km W of Cobb, CaliforniaThu, Aug 30, 4:37 PM PDT · 15370 days ago · 5 km deep · 4 km away
18. 2.416 km W of Williams, CaliforniaThu, Aug 30, 6:56 PM PDT · 15370 days ago · 1 km deep · 54 km away
19. 2.34 km WNW of Lucas Valley-Marinwood, CaliforniaFri, Aug 31, 11:35 AM PDT · 15369 days ago · 3 km deep · 83 km away
20. 1.76 km W of Cobb, CaliforniaFri, Aug 31, 9:47 PM PDT · 15369 days ago · 1 km deep · 5 km away
21. 1.67 km ENE of Willits, CaliforniaSat, Sep 1, 9:23 PM PDT · 15368 days ago · 4 km deep · 83 km away
22. 1.67 km ENE of Willits, CaliforniaSat, Sep 1, 9:30 PM PDT · 15368 days ago · 3 km deep · 83 km away
23. 1.67 km ENE of Willits, CaliforniaSat, Sep 1, 9:38 PM PDT · 15368 days ago · 4 km deep · 84 km away
24. 1.811 km SW of Hopland, CaliforniaSun, Sep 2, 12:16 AM PDT · 15368 days ago · 4 km deep · 40 km away
25. 1.77 km ENE of Willits, CaliforniaSun, Sep 2, 2:01 AM PDT · 15368 days ago · 5 km deep · 83 km away
26. 1.56 km W of Cobb, CaliforniaSun, Sep 2, 6:05 AM PDT · 15368 days ago · 1 km deep · 4 km away
27. 1.66 km W of Cobb, CaliforniaSun, Sep 2, 5:39 PM PDT · 15367 days ago · 3 km deep · 3 km away
28. 2.215 km ESE of Hidden Valley Lake, CaliforniaMon, Sep 3, 12:34 AM PDT · 15367 days ago · 0 km deep · 33 km away
29. 2.75 km N of Redwood Valley, CaliforniaMon, Sep 3, 5:48 AM PDT · 15367 days ago · 42 km deep · 69 km away
30. 1.65 km W of Cobb, CaliforniaMon, Sep 3, 12:41 PM PDT · 15366 days ago · 0 km deep · 4 km away
31. 1.65 km SW of Moskowite Corner, CaliforniaWed, Sep 5, 6:39 AM PDT · 15365 days ago · 0 km deep · 64 km away
32. 1.88 km W of Cobb, CaliforniaThu, Sep 6, 8:11 AM PDT · 15364 days ago · 1 km deep · 5 km away
33. 2.09 km SE of Hopland, CaliforniaThu, Sep 6, 8:43 AM PDT · 15364 days ago · 0 km deep · 26 km away
34. 2.116 km E of Angwin, CaliforniaFri, Sep 7, 7:13 AM PDT · 15363 days ago · 7 km deep · 50 km away
35. 1.93 km NNE of Talmage, CaliforniaSat, Sep 8, 12:12 AM PDT · 15362 days ago · 6 km deep · 52 km away
36. 1.95 km SW of Cobb, CaliforniaSat, Sep 8, 8:58 AM PDT · 15362 days ago · 0 km deep · 0 km away
37. 1.710 km WNW of Williams, CaliforniaSat, Sep 8, 12:59 PM PDT · 15361 days ago · 4 km deep · 61 km away
38. 3.05 km SW of Cobb, CaliforniaSat, Sep 8, 7:08 PM PDT · 15361 days ago · 0 km deep · 1 km away
39. 1.85 km SW of Cobb, CaliforniaSun, Sep 9, 2:38 AM PDT · 15361 days ago · -1 km deep · 0 km away
40. 2.15 km SW of Cobb, CaliforniaSun, Sep 9, 2:38 AM PDT · 15361 days ago · 0 km deep · 1 km away
41. 1.86 km W of Cobb, CaliforniaSun, Sep 9, 4:32 AM PDT · 15361 days ago · 3 km deep · 4 km away
42. 1.63 km NNE of Larkfield-Wikiup, CaliforniaSun, Sep 9, 5:56 AM PDT · 15361 days ago · 7 km deep · 28 km away
43. 1.98 km W of Cobb, CaliforniaSun, Sep 9, 7:13 AM PDT · 15361 days ago · -1 km deep · 4 km away
44. 1.86 km W of Cobb, CaliforniaSun, Sep 9, 11:54 AM PDT · 15360 days ago · 0 km deep · 4 km away
45. 1.78 km WSW of Cobb, CaliforniaMon, Sep 10, 2:41 PM PDT · 15359 days ago · 0 km deep · 4 km away
46. 1.96 km W of Cobb, CaliforniaMon, Sep 10, 2:55 PM PDT · 15359 days ago · 3 km deep · 3 km away
47. 1.67 km WSW of Cobb, CaliforniaTue, Sep 11, 4:33 PM PDT · 15358 days ago · 2 km deep · 3 km away
48. 1.86 km W of Cobb, CaliforniaWed, Sep 12, 4:45 AM PDT · 15358 days ago · 4 km deep · 4 km away
49. 2.36 km W of Cobb, CaliforniaWed, Sep 12, 7:58 AM PDT · 15358 days ago · 2 km deep · 3 km away
50. 2.24 km SSW of Green Valley, CaliforniaWed, Sep 12, 11:06 AM PDT · 15357 days ago · 6 km deep · 83 km away
51. 1.86 km W of Cobb, CaliforniaWed, Sep 12, 4:44 PM PDT · 15357 days ago · 3 km deep · 3 km away
52. 1.65 km SSW of Philo, CaliforniaWed, Sep 12, 7:28 PM PDT · 15357 days ago · -1 km deep · 65 km away
53. 1.92 km ESE of Deer Park, CaliforniaThu, Sep 13, 2:56 AM PDT · 15357 days ago · 0 km deep · 42 km away
54. 2.1Northern CaliforniaThu, Sep 13, 5:06 PM PDT · 15356 days ago · 11 km deep · 36 km away
55. 4.110 km W of Philo, CaliforniaFri, Sep 14, 2:10 AM PDT · 15356 days ago · 14 km deep · 74 km away
56. 2.24 km W of Vallejo, CaliforniaFri, Sep 14, 11:37 AM PDT · 15355 days ago · 8 km deep · 86 km away
57. 1.56 km WSW of Cobb, CaliforniaFri, Sep 14, 7:45 PM PDT · 15355 days ago · 3 km deep · 2 km away
58. 1.87 km W of Cobb, CaliforniaSat, Sep 15, 5:41 PM PDT · 15354 days ago · 3 km deep · 4 km away
59. 1.77 km W of Cobb, CaliforniaSat, Sep 15, 6:53 PM PDT · 15354 days ago · 2 km deep · 4 km away
60. 1.66 km SW of Eldridge, CaliforniaSun, Sep 16, 10:04 AM PDT · 15354 days ago · 5 km deep · 56 km away

The first 60 of 179.

Before

1. 1.58 km S of Calistoga, CaliforniaMon, Aug 27, 2:07 PM PDT · 15373 days ago · 7 km deep · 37 km away
2. 2.48 km NNE of Hopland, CaliforniaMon, Aug 27, 12:10 PM PDT · 15373 days ago · 1 km deep · 39 km away
3. 1.65 km W of Cobb, CaliforniaMon, Aug 27, 12:02 PM PDT · 15373 days ago · 0 km deep · 3 km away
4. 1.710 km NNE of Cloverdale, CaliforniaSun, Aug 26, 11:47 PM PDT · 15374 days ago · 5 km deep · 22 km away
5. 2.46 km WSW of Cobb, CaliforniaSun, Aug 26, 8:44 PM PDT · 15374 days ago · 1 km deep · 2 km away
6. 1.816 km NNE of Upper Lake, CaliforniaSun, Aug 26, 5:39 AM PDT · 15375 days ago · 7 km deep · 56 km away
7. 1.57 km W of Cobb, CaliforniaSun, Aug 26, 5:23 AM PDT · 15375 days ago · 3 km deep · 4 km away
8. 2.93 km E of Redwood Valley, CaliforniaSat, Aug 25, 10:26 AM PDT · 15376 days ago · 6 km deep · 63 km away
9. 2.06 km WSW of Cobb, CaliforniaSat, Aug 25, 7:03 AM PDT · 15376 days ago · 0 km deep · 2 km away
10. 1.57 km W of Cobb, CaliforniaSat, Aug 25, 12:32 AM PDT · 15376 days ago · 1 km deep · 4 km away
11. 2.04 km WSW of Cobb, CaliforniaFri, Aug 24, 2:41 AM PDT · 15377 days ago · 1 km deep · 1 km away
12. 2.57 km WSW of Cobb, CaliforniaFri, Aug 24, 12:15 AM PDT · 15377 days ago · 0 km deep · 3 km away
13. 1.75 km SW of Cobb, CaliforniaThu, Aug 23, 1:27 AM PDT · 15378 days ago · 0 km deep · 0 km away
14. 1.79 km WSW of Cobb, CaliforniaTue, Aug 21, 4:50 AM PDT · 15380 days ago · 2 km deep · 4 km away
15. 2.45 km SW of Cottonwood, CaliforniaTue, Aug 21, 3:24 AM PDT · 15380 days ago · 1 km deep · 69 km away
16. 1.65 km E of Healdsburg, CaliforniaMon, Aug 20, 11:05 PM PDT · 15380 days ago · 1 km deep · 21 km away
17. 1.917 km WSW of Guinda, CaliforniaMon, Aug 20, 6:19 PM PDT · 15380 days ago · 5 km deep · 36 km away
18. 2.35 km WSW of Cobb, CaliforniaMon, Aug 20, 11:31 AM PDT · 15380 days ago · 1 km deep · 2 km away
19. 1.85 km SW of Cobb, CaliforniaMon, Aug 20, 10:47 AM PDT · 15380 days ago · 1 km deep · 2 km away
20. 1.66 km W of Cobb, CaliforniaSun, Aug 19, 9:10 AM PDT · 15382 days ago · 3 km deep · 4 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc26537. Read Wed, Sep 30, 2026, 5:13 AM UTC.