M1.6 earthquake 7 km W of Cobb, California

Magnitude

1.6 (md), micro

Local time

Tue, Feb 28, 1984, 12:03 AM PST

UTC

1984-02-28 08:03:34 UTC

Depth

3.2 km (2.0 mi), shallow

Epicenter

38.819° N, 122.810° 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

±0.11

Depth from

From location

Station coverage gap

77°

Stations used

15

• Cobb, CaliforniaPopulation 1,778. Forecast7 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast22 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast43 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast669 kmNW

After

1. 1.77 km WSW of Cobb, CaliforniaFri, Mar 16, 2:28 AM PST · 15530 days ago · 3 km deep · 3 km away
2. 1.68 km ESE of Talmage, CaliforniaSat, Mar 17, 4:51 AM PST · 15529 days ago · 8 km deep · 40 km away
3. 1.97 km E of Willits, CaliforniaSat, Mar 17, 11:56 AM PST · 15529 days ago · 8 km deep · 76 km away
4. 1.80 km WNW of Green Valley, CaliforniaSat, Mar 17, 7:08 PM PST · 15528 days ago · 10 km deep · 84 km away
5. 1.76 km W of Cobb, CaliforniaSat, Mar 17, 9:42 PM PST · 15528 days ago · 3 km deep · 1 km away
6. 2.1near the coast of Northern CaliforniaSun, Mar 18, 12:52 AM PST · 15528 days ago · 8 km deep · 84 km away
7. 2.5Northern CaliforniaSun, Mar 18, 3:50 AM PST · 15528 days ago · 1 km deep · 3 km away
8. 1.67 km WSW of Cobb, CaliforniaSun, Mar 18, 9:02 AM PST · 15528 days ago · 1 km deep · 3 km away
9. 1.73 km SW of Rutherford, CaliforniaSun, Mar 18, 11:13 AM PST · 15528 days ago · 6 km deep · 53 km away
10. 1.86 km NW of Hopland, CaliforniaSun, Mar 18, 2:11 PM PST · 15528 days ago · 25 km deep · 37 km away
11. 2.56 km W of Cobb, CaliforniaSun, Mar 18, 2:58 PM PST · 15528 days ago · 1 km deep · 1 km away
12. 1.86 km WSW of Geyserville, CaliforniaMon, Mar 19, 8:17 AM PST · 15527 days ago · 11 km deep · 20 km away
13. 1.54 km WSW of Cobb, CaliforniaMon, Mar 19, 1:25 PM PST · 15527 days ago · 1 km deep · 4 km away
14. 2.47 km WSW of Cobb, CaliforniaTue, Mar 20, 4:23 AM PST · 15526 days ago · 2 km deep · 2 km away
15. 2.411 km E of Cloverdale, CaliforniaTue, Mar 20, 9:59 AM PST · 15526 days ago · 22 km deep · 7 km away
16. 2.313 km N of Comptche, CaliforniaTue, Mar 20, 10:26 AM PST · 15526 days ago · 21 km deep · 90 km away
17. 1.64 km WSW of Cobb, CaliforniaTue, Mar 20, 4:17 PM PST · 15525 days ago · 1 km deep · 4 km away
18. 1.65 km SW of Cobb, CaliforniaTue, Mar 20, 4:33 PM PST · 15525 days ago · 1 km deep · 4 km away
19. 2.08 km WSW of Cobb, CaliforniaTue, Mar 20, 6:25 PM PST · 15525 days ago · 3 km deep · 3 km away
20. 1.97 km WSW of Cobb, CaliforniaTue, Mar 20, 8:29 PM PST · 15525 days ago · 0 km deep · 2 km away
21. 2.18 km W of Cobb, CaliforniaWed, Mar 21, 4:01 AM PST · 15525 days ago · 0 km deep · 1 km away
22. 1.97 km E of Willits, CaliforniaWed, Mar 21, 6:14 AM PST · 15525 days ago · 7 km deep · 76 km away
23. 1.713 km WNW of Cloverdale, CaliforniaWed, Mar 21, 1:08 PM PST · 15525 days ago · 23 km deep · 31 km away
24. 1.511 km SSW of Kelseyville, CaliforniaThu, Mar 22, 2:28 AM PST · 15524 days ago · 19 km deep · 9 km away
25. 1.77 km WSW of Cobb, CaliforniaThu, Mar 22, 4:49 AM PST · 15524 days ago · 1 km deep · 2 km away
26. 2.57 km W of Cobb, CaliforniaThu, Mar 22, 8:16 AM PST · 15524 days ago · 4 km deep · 0 km away
27. 1.76 km WSW of Inverness, CaliforniaThu, Mar 22, 1:49 PM PST · 15524 days ago · 5 km deep · 84 km away
28. 2.16 km W of Cobb, CaliforniaThu, Mar 22, 5:25 PM PST · 15523 days ago · 2 km deep · 1 km away
29. 1.76 km NNE of Black Point-Green Point, CaliforniaFri, Mar 23, 1:54 PM PST · 15523 days ago · 1 km deep · 78 km away
30. 1.53 km NNE of Geyserville, CaliforniaFri, Mar 23, 3:35 PM PST · 15523 days ago · 14 km deep · 11 km away
31. 1.57 km WSW of Cobb, CaliforniaFri, Mar 23, 3:37 PM PST · 15523 days ago · 1 km deep · 2 km away
32. 2.43 km SSW of Green Valley, CaliforniaSat, Mar 24, 4:49 AM PST · 15522 days ago · 5 km deep · 86 km away
33. 2.21 km SSE of Green Valley, CaliforniaSat, Mar 24, 4:50 AM PST · 15522 days ago · 5 km deep · 86 km away
34. 1.67 km W of Cobb, CaliforniaSat, Mar 24, 6:22 AM PST · 15522 days ago · 3 km deep · 1 km away
35. 1.85 km SW of Cobb, CaliforniaSat, Mar 24, 7:11 AM PST · 15522 days ago · 1 km deep · 6 km away
36. 2.00 km WSW of Green Valley, CaliforniaSat, Mar 24, 8:58 AM PST · 15522 days ago · 9 km deep · 84 km away
37. 1.76 km WNW of American Canyon, CaliforniaSat, Mar 24, 10:01 AM PST · 15522 days ago · 5 km deep · 81 km away
38. 1.65 km SW of Cobb, CaliforniaSat, Mar 24, 10:51 AM PST · 15522 days ago · 1 km deep · 6 km away
39. 3.24 km N of Redwood Valley, CaliforniaSat, Mar 24, 2:42 PM PST · 15522 days ago · 8 km deep · 64 km away
40. 1.74 km N of Redwood Valley, CaliforniaSat, Mar 24, 2:46 PM PST · 15522 days ago · 4 km deep · 64 km away
41. 1.67 km WSW of Cobb, CaliforniaSun, Mar 25, 11:13 PM PST · 15520 days ago · 1 km deep · 1 km away
42. 1.810 km ESE of Hopland, CaliforniaMon, Mar 26, 1:24 PM PST · 15520 days ago · 10 km deep · 22 km away
43. 1.67 km WSW of Cobb, CaliforniaMon, Mar 26, 11:54 PM PST · 15519 days ago · 1 km deep · 2 km away
44. 2.37 km WSW of Cobb, CaliforniaMon, Mar 26, 11:55 PM PST · 15519 days ago · 1 km deep · 2 km away
45. 1.62 km NE of Ukiah, CaliforniaTue, Mar 27, 11:40 AM PST · 15519 days ago · 8 km deep · 51 km away
46. 1.98 km WSW of Cobb, CaliforniaTue, Mar 27, 11:24 PM PST · 15518 days ago · 3 km deep · 2 km away
47. 1.57 km WSW of Calistoga, CaliforniaWed, Mar 28, 11:33 AM PST · 15518 days ago · 0 km deep · 33 km away
48. 2.17 km W of Cobb, CaliforniaWed, Mar 28, 5:56 PM PST · 15517 days ago · -1 km deep · 1 km away
49. 2.05 km WSW of Cobb, CaliforniaThu, Mar 29, 3:47 AM PST · 15517 days ago · 0 km deep · 3 km away
50. 3.05 km WSW of Cobb, CaliforniaThu, Mar 29, 8:02 AM PST · 15517 days ago · 0 km deep · 3 km away
51. 2.26 km WSW of Cobb, CaliforniaThu, Mar 29, 8:02 AM PST · 15517 days ago · 0 km deep · 3 km away
52. 2.09 km W of Cobb, CaliforniaThu, Mar 29, 9:23 AM PST · 15517 days ago · 2 km deep · 2 km away
53. 1.66 km NNE of Benicia, CaliforniaThu, Mar 29, 7:47 PM PST · 15516 days ago · 5 km deep · 99 km away
54. 2.16 km NNE of Clearlake Oaks, CaliforniaFri, Mar 30, 2:59 AM PST · 15516 days ago · 6 km deep · 33 km away
55. 1.55 km W of Cobb, CaliforniaFri, Mar 30, 10:37 AM PST · 15516 days ago · 0 km deep · 2 km away
56. 1.76 km W of Cobb, CaliforniaFri, Mar 30, 10:38 AM PST · 15516 days ago · 0 km deep · 2 km away
57. 2.39 km WSW of Cobb, CaliforniaFri, Mar 30, 12:17 PM PST · 15516 days ago · 1 km deep · 3 km away
58. 2.18 km WSW of Cobb, CaliforniaFri, Mar 30, 12:20 PM PST · 15516 days ago · 3 km deep · 2 km away
59. 1.67 km WSW of Cobb, CaliforniaFri, Mar 30, 2:48 PM PST · 15516 days ago · 0 km deep · 2 km away
60. 1.65 km SW of Cobb, CaliforniaFri, Mar 30, 4:02 PM PST · 15515 days ago · 1 km deep · 4 km away

The first 60 of 168.

From the USGS Earthquake Hazards Program and its partner networks, event nc1111893. Read Tue, Sep 22, 2026, 11:19 AM UTC.