M2.0 earthquake 7 km W of Cobb, California

Magnitude

2.0 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Fri, Jul 27, 1984, 12:22 AM PDT

UTC

1984-07-27 07:22:40 UTC

Depth

3.2 km (2.0 mi), shallow

Epicenter

38.818° N, 122.807° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.11

Depth from

From location

Station coverage gap

90°

Stations used

18

• 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. 1.64 km SW of Calistoga, CaliforniaFri, Jul 27, 2:30 AM PDT · 15408 days ago · -1 km deep · 34 km away
2. 3.27 km SW of Cobb, CaliforniaFri, Jul 27, 10:29 AM PDT · 15408 days ago · 3 km deep · 6 km away
3. 1.57 km SW of Cobb, CaliforniaFri, Jul 27, 10:37 AM PDT · 15408 days ago · 3 km deep · 6 km away
4. 1.625 km NNE of Potter Valley, CaliforniaFri, Jul 27, 10:49 PM PDT · 15407 days ago · 3 km deep · 81 km away
5. 1.57 km WSW of Cobb, CaliforniaSat, Jul 28, 6:27 PM PDT · 15407 days ago · 2 km deep · 2 km away
6. 2.36 km WSW of Cobb, CaliforniaSat, Jul 28, 7:37 PM PDT · 15407 days ago · 3 km deep · 1 km away
7. 2.25 km WSW of Cobb, CaliforniaSat, Jul 28, 10:58 PM PDT · 15406 days ago · 0 km deep · 2 km away
8. 1.98 km WSW of Cobb, CaliforniaSun, Jul 29, 3:04 AM PDT · 15406 days ago · 0 km deep · 2 km away
9. 1.74 km SSE of Calpella, CaliforniaSun, Jul 29, 4:43 AM PDT · 15406 days ago · 7 km deep · 53 km away
10. 2.07 km W of Cobb, CaliforniaSun, Jul 29, 9:37 AM PDT · 15406 days ago · 0 km deep · 0 km away
11. 1.97 km WSW of Cobb, CaliforniaSun, Jul 29, 9:41 AM PDT · 15406 days ago · 1 km deep · 1 km away
12. 1.87 km W of Cobb, CaliforniaSun, Jul 29, 9:45 AM PDT · 15406 days ago · 0 km deep · 0 km away
13. 1.625 km NNE of Potter Valley, CaliforniaSun, Jul 29, 7:02 PM PDT · 15406 days ago · 6 km deep · 81 km away
14. 1.68 km W of Cobb, CaliforniaSun, Jul 29, 7:02 PM PDT · 15406 days ago · 3 km deep · 1 km away
15. 2.45 km NNW of Guinda, CaliforniaSun, Jul 29, 10:39 PM PDT · 15405 days ago · 0 km deep · 51 km away
16. 1.78 km WSW of Cobb, CaliforniaMon, Jul 30, 2:35 PM PDT · 15405 days ago · 3 km deep · 3 km away
17. 2.67 km W of Cobb, CaliforniaMon, Jul 30, 3:06 PM PDT · 15405 days ago · 2 km deep · 0 km away
18. 2.21 km S of American Canyon, CaliforniaMon, Jul 30, 3:09 PM PDT · 15405 days ago · 0 km deep · 87 km away
19. 3.06 km W of Cobb, CaliforniaMon, Jul 30, 3:21 PM PDT · 15405 days ago · 3 km deep · 1 km away
20. 2.326 km ENE of Potter Valley, CaliforniaTue, Jul 31, 2:35 AM PDT · 15404 days ago · 4 km deep · 71 km away
21. 2.315 km NE of Lucerne, CaliforniaTue, Jul 31, 2:56 AM PDT · 15404 days ago · 0 km deep · 44 km away
22. 2.0Northern CaliforniaTue, Jul 31, 6:09 AM PDT · 15404 days ago · 0 km deep · 1 km away
23. 2.16 km W of Cobb, CaliforniaWed, Aug 1, 11:47 AM PDT · 15403 days ago · 3 km deep · 1 km away
24. 1.66 km W of Cobb, CaliforniaWed, Aug 1, 12:25 PM PDT · 15403 days ago · 3 km deep · 1 km away
25. 1.94 km W of Cobb, CaliforniaWed, Aug 1, 2:32 PM PDT · 15403 days ago · -1 km deep · 2 km away
26. 1.52 km WNW of Redwood Valley, CaliforniaFri, Aug 3, 9:30 PM PDT · 15401 days ago · 4 km deep · 62 km away
27. 1.88 km WSW of Cobb, CaliforniaSat, Aug 4, 3:40 PM PDT · 15400 days ago · 3 km deep · 1 km away
28. 1.613 km NNW of Moskowite Corner, CaliforniaSat, Aug 4, 8:23 PM PDT · 15400 days ago · 15 km deep · 56 km away
29. 1.56 km WSW of Cobb, CaliforniaSat, Aug 4, 10:45 PM PDT · 15399 days ago · 3 km deep · 2 km away
30. 1.920 km NNE of Upper Lake, CaliforniaSun, Aug 5, 11:53 PM PDT · 15398 days ago · 7 km deep · 58 km away
31. 1.66 km W of Cobb, CaliforniaMon, Aug 6, 7:56 AM PDT · 15398 days ago · 2 km deep · 1 km away
32. 1.96 km WSW of Cobb, CaliforniaTue, Aug 7, 12:52 PM PDT · 15397 days ago · 3 km deep · 2 km away
33. 2.46 km W of Cobb, CaliforniaWed, Aug 8, 2:10 AM PDT · 15396 days ago · 3 km deep · 1 km away
34. 1.74 km WSW of Cobb, CaliforniaWed, Aug 8, 3:20 AM PDT · 15396 days ago · 1 km deep · 3 km away
35. 2.73 km ENE of Lakeport, CaliforniaWed, Aug 8, 10:06 AM PDT · 15396 days ago · 2 km deep · 26 km away
36. 1.76 km W of Cobb, CaliforniaThu, Aug 9, 6:34 AM PDT · 15395 days ago · 1 km deep · 1 km away
37. 1.99 km WSW of Cobb, CaliforniaThu, Aug 9, 11:40 PM PDT · 15394 days ago · 1 km deep · 3 km away
38. 1.74 km W of Redwood Valley, CaliforniaFri, Aug 10, 6:57 AM PDT · 15394 days ago · 2 km deep · 62 km away
39. 2.07 km W of Cobb, CaliforniaFri, Aug 10, 9:26 AM PDT · 15394 days ago · 3 km deep · 0 km away
40. 2.48 km SSE of Dunnigan, CaliforniaFri, Aug 10, 10:47 AM PDT · 15394 days ago · 9 km deep · 77 km away
41. 1.84 km W of Cobb, CaliforniaFri, Aug 10, 2:10 PM PDT · 15394 days ago · 0 km deep · 3 km away
42. 1.84 km W of Cobb, CaliforniaSat, Aug 11, 2:52 AM PDT · 15393 days ago · -1 km deep · 3 km away
43. 2.15 km SW of Cobb, CaliforniaSat, Aug 11, 4:02 PM PDT · 15393 days ago · 1 km deep · 5 km away
44. 1.613 km NNE of Angwin, CaliforniaSat, Aug 11, 4:27 PM PDT · 15393 days ago · 8 km deep · 38 km away
45. 2.619 km ENE of Potter Valley, CaliforniaMon, Aug 13, 4:23 AM PDT · 15391 days ago · 10 km deep · 62 km away
46. 1.918 km ENE of Potter Valley, CaliforniaMon, Aug 13, 4:24 AM PDT · 15391 days ago · 5 km deep · 61 km away
47. 1.810 km S of Willows, CaliforniaTue, Aug 14, 2:42 AM PDT · 15390 days ago · 20 km deep · 87 km away
48. 2.110 km WNW of Lakeport, CaliforniaTue, Aug 14, 11:42 PM PDT · 15389 days ago · 30 km deep · 34 km away
49. 1.75 km SW of Cobb, CaliforniaWed, Aug 15, 7:30 AM PDT · 15389 days ago · 0 km deep · 5 km away
50. 1.66 km W of Cobb, CaliforniaWed, Aug 15, 7:34 AM PDT · 15389 days ago · 3 km deep · 1 km away
51. 2.68 km WSW of Cobb, CaliforniaWed, Aug 15, 8:51 AM PDT · 15389 days ago · 3 km deep · 3 km away
52. 1.76 km W of Cobb, CaliforniaThu, Aug 16, 9:21 AM PDT · 15388 days ago · 3 km deep · 1 km away
53. 1.76 km W of Cobb, CaliforniaFri, Aug 17, 6:16 AM PDT · 15387 days ago · 3 km deep · 1 km away
54. 2.13 km SE of Clearlake Oaks, CaliforniaFri, Aug 17, 3:26 PM PDT · 15387 days ago · 2 km deep · 25 km away
55. 1.612 km ESE of Hidden Valley Lake, CaliforniaSat, Aug 18, 3:00 AM PDT · 15386 days ago · 1 km deep · 33 km away
56. 1.66 km W of Cobb, CaliforniaSun, Aug 19, 9:10 AM PDT · 15385 days ago · 3 km deep · 1 km away
57. 1.85 km SW of Cobb, CaliforniaMon, Aug 20, 10:47 AM PDT · 15384 days ago · 1 km deep · 6 km away
58. 2.35 km WSW of Cobb, CaliforniaMon, Aug 20, 11:31 AM PDT · 15384 days ago · 1 km deep · 3 km away
59. 1.917 km WSW of Guinda, CaliforniaMon, Aug 20, 6:19 PM PDT · 15384 days ago · 5 km deep · 39 km away
60. 1.65 km E of Healdsburg, CaliforniaMon, Aug 20, 11:05 PM PDT · 15383 days ago · 1 km deep · 24 km away

The first 60 of 166.

Before

1. 1.7near the coast of Northern CaliforniaThu, Jul 26, 6:01 PM PDT · 15409 days ago · 1 km deep · 97 km away
2. 1.611 km E of Angwin, CaliforniaWed, Jul 25, 11:47 PM PDT · 15409 days ago · 2 km deep · 49 km away
3. 1.66 km W of Cobb, CaliforniaWed, Jul 25, 6:15 PM PDT · 15410 days ago · 2 km deep · 1 km away
4. 1.77 km WSW of Cobb, CaliforniaWed, Jul 25, 10:59 AM PDT · 15410 days ago · 0 km deep · 3 km away
5. 1.618 km NE of Potter Valley, CaliforniaTue, Jul 24, 11:20 PM PDT · 15410 days ago · 7 km deep · 68 km away
6. 2.05 km W of Cobb, CaliforniaTue, Jul 24, 10:50 AM PDT · 15411 days ago · 2 km deep · 2 km away
7. 1.68 km W of Cobb, CaliforniaTue, Jul 24, 2:00 AM PDT · 15411 days ago · 1 km deep · 2 km away
8. 1.96 km W of Cobb, CaliforniaTue, Jul 24, 12:41 AM PDT · 15411 days ago · 3 km deep · 1 km away
9. 1.610 km W of Geyserville, CaliforniaMon, Jul 23, 3:36 PM PDT · 15412 days ago · -1 km deep · 22 km away
10. 1.623 km NNE of Potter Valley, CaliforniaMon, Jul 23, 5:15 AM PDT · 15412 days ago · 10 km deep · 78 km away
11. 2.23 km SE of Clear Lake Riviera, CaliforniaSun, Jul 22, 11:16 PM PDT · 15412 days ago · -1 km deep · 16 km away
12. 1.56 km WSW of Cobb, CaliforniaSun, Jul 22, 9:21 PM PDT · 15413 days ago · 4 km deep · 2 km away
13. 2.326 km NNE of Potter Valley, CaliforniaSun, Jul 22, 5:31 AM PDT · 15413 days ago · 7 km deep · 81 km away
14. 1.5Northern CaliforniaSat, Jul 21, 11:53 PM PDT · 15413 days ago · 1 km deep · 2 km away
15. 2.16 km W of Cobb, CaliforniaSat, Jul 21, 8:23 PM PDT · 15414 days ago · 2 km deep · 1 km away
16. 2.35 km SW of Cobb, CaliforniaSat, Jul 21, 11:34 AM PDT · 15414 days ago · 0 km deep · 4 km away
17. 1.67 km WSW of Cobb, CaliforniaSat, Jul 21, 9:27 AM PDT · 15414 days ago · 3 km deep · 2 km away
18. 1.65 km SW of Cobb, CaliforniaSat, Jul 21, 5:56 AM PDT · 15414 days ago · -1 km deep · 4 km away
19. 2.25 km SW of Cobb, CaliforniaSat, Jul 21, 5:39 AM PDT · 15414 days ago · 0 km deep · 5 km away
20. 1.66 km W of Cobb, CaliforniaFri, Jul 20, 9:28 PM PDT · 15415 days ago · 2 km deep · 1 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc24149. Read Sat, Oct 3, 2026, 4:34 PM UTC.