M1.9 earthquake 5 km W of Cobb, California

Magnitude

1.9 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sat, Sep 30, 1989, 10:34 PM PDT

UTC

1989-10-01 05:34:33 UTC

Depth

0.9 km (0.5 mi), shallow

Epicenter

38.832° N, 122.789° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.27

Depth from

From location

Station coverage gap

95°

Stations used

19

• Cobb, CaliforniaPopulation 1,778. Forecast6 kmWNW
• Clearlake, CaliforniaPopulation 15,182. Forecast20 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast44 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast669 kmNW

After

1. 1.88 km W of Cobb, CaliforniaSun, Oct 1, 9:30 PM PDT · 13517 days ago · 1 km deep · 3 km away
2. 2.58 km W of Cobb, CaliforniaMon, Oct 2, 11:23 AM PDT · 13517 days ago · 0 km deep · 3 km away
3. 1.57 km WSW of Cobb, CaliforniaMon, Oct 2, 2:29 PM PDT · 13517 days ago · 4 km deep · 4 km away
4. 1.913 km E of Clearlake, CaliforniaTue, Oct 3, 3:27 AM PDT · 13516 days ago · 1 km deep · 32 km away
5. 1.57 km W of Cobb, CaliforniaTue, Oct 3, 4:18 AM PDT · 13516 days ago · 0 km deep · 2 km away
6. 1.87 km WNW of Cobb, CaliforniaTue, Oct 3, 4:19 AM PDT · 13516 days ago · 0 km deep · 1 km away
7. 2.29 km W of Cobb, CaliforniaTue, Oct 3, 9:43 AM PDT · 13516 days ago · 2 km deep · 3 km away
8. 2.925 km NE of Potter Valley, CaliforniaTue, Oct 3, 11:50 AM PDT · 13516 days ago · 6 km deep · 73 km away
9. 1.822 km NE of Potter Valley, CaliforniaTue, Oct 3, 11:58 AM PDT · 13516 days ago · 7 km deep · 70 km away
10. 1.824 km NE of Potter Valley, CaliforniaWed, Oct 4, 12:42 AM PDT · 13515 days ago · 8 km deep · 75 km away
11. 1.622 km NE of Potter Valley, CaliforniaWed, Oct 4, 5:10 AM PDT · 13515 days ago · 7 km deep · 70 km away
12. 1.811 km WSW of Elk Creek, CaliforniaWed, Oct 4, 6:41 AM PDT · 13515 days ago · 17 km deep · 84 km away
13. 2.04 km W of Cobb, CaliforniaWed, Oct 4, 4:27 PM PDT · 13515 days ago · 2 km deep · 1 km away
14. 1.95 km SW of Boonville, CaliforniaThu, Oct 5, 11:08 PM PDT · 13513 days ago · 7 km deep · 57 km away
15. 1.86 km W of Cobb, CaliforniaThu, Oct 5, 11:47 PM PDT · 13513 days ago · 4 km deep · 2 km away
16. 1.67 km WNW of Cobb, CaliforniaSat, Oct 7, 1:21 PM PDT · 13512 days ago · 0 km deep · 2 km away
17. 1.66 km WSW of Cobb, CaliforniaSun, Oct 8, 9:38 AM PDT · 13511 days ago · 1 km deep · 4 km away
18. 1.9Northern CaliforniaSun, Oct 8, 9:49 AM PDT · 13511 days ago · 2 km deep · 12 km away
19. 2.322 km NE of Potter Valley, CaliforniaSun, Oct 8, 3:38 PM PDT · 13511 days ago · 7 km deep · 70 km away
20. 1.921 km NE of Potter Valley, CaliforniaSun, Oct 8, 4:14 PM PDT · 13511 days ago · 7 km deep · 70 km away
21. 2.024 km NE of Potter Valley, CaliforniaMon, Oct 9, 7:53 PM PDT · 13509 days ago · 11 km deep · 76 km away
22. 1.724 km NE of Potter Valley, CaliforniaMon, Oct 9, 7:55 PM PDT · 13509 days ago · 11 km deep · 75 km away
23. 3.26 km W of Cobb, CaliforniaTue, Oct 10, 10:53 PM PDT · 13508 days ago · 1 km deep · 1 km away
24. 2.87 km W of Cobb, CaliforniaTue, Oct 10, 10:53 PM PDT · 13508 days ago · -1 km deep · 2 km away
25. 2.06 km W of Cobb, CaliforniaTue, Oct 10, 10:54 PM PDT · 13508 days ago · 2 km deep · 1 km away
26. 2.04 km WSW of Cobb, CaliforniaWed, Oct 11, 1:09 AM PDT · 13508 days ago · 2 km deep · 4 km away
27. 2.55 km W of Cobb, CaliforniaWed, Oct 11, 2:47 AM PDT · 13508 days ago · -1 km deep · 1 km away
28. 2.36 km W of Cobb, CaliforniaThu, Oct 12, 8:45 AM PDT · 13507 days ago · 4 km deep · 2 km away
29. 1.58 km E of Hidden Valley Lake, CaliforniaThu, Oct 12, 6:22 PM PDT · 13507 days ago · 8 km deep · 28 km away
30. 1.612 km ENE of Angwin, CaliforniaThu, Oct 12, 11:06 PM PDT · 13506 days ago · 3 km deep · 47 km away
31. 1.66 km WNW of Cobb, CaliforniaFri, Oct 13, 2:43 AM PDT · 13506 days ago · 3 km deep · 1 km away
32. 1.86 km W of Cobb, CaliforniaFri, Oct 13, 3:50 PM PDT · 13506 days ago · 1 km deep · 1 km away
33. 1.95 km WSW of Cobb, CaliforniaFri, Oct 13, 10:22 PM PDT · 13505 days ago · 0 km deep · 2 km away
34. 1.67 km W of Cobb, CaliforniaSat, Oct 14, 1:37 AM PDT · 13505 days ago · 0 km deep · 2 km away
35. 1.65 km WSW of Cobb, CaliforniaSun, Oct 15, 2:02 AM PDT · 13504 days ago · 0 km deep · 2 km away
36. 2.26 km NW of Anchor Bay, CaliforniaSun, Oct 15, 7:19 AM PDT · 13504 days ago · 2 km deep · 72 km away
37. 2.08 km WSW of Cobb, CaliforniaMon, Oct 16, 9:25 AM PDT · 13503 days ago · 3 km deep · 4 km away
38. 1.84 km WSW of Cobb, CaliforniaMon, Oct 16, 6:28 PM PDT · 13503 days ago · 2 km deep · 4 km away
39. 1.9near the coast of Northern CaliforniaTue, Oct 17, 3:33 AM PDT · 13502 days ago · 5 km deep · 53 km away
40. 1.97 km WSW of Cobb, CaliforniaTue, Oct 17, 4:09 PM PDT · 13502 days ago · 1 km deep · 4 km away
41. 2.17 km WSW of Kenwood, CaliforniaWed, Oct 18, 9:29 AM PDT · 13501 days ago · 5 km deep · 52 km away
42. 2.51 km E of Kenwood, CaliforniaWed, Oct 18, 11:07 AM PDT · 13501 days ago · 0 km deep · 52 km away
43. 2.67 km W of Cobb, CaliforniaThu, Oct 19, 5:16 AM PDT · 13500 days ago · -1 km deep · 2 km away
44. 2.08 km W of Cobb, CaliforniaThu, Oct 19, 5:19 AM PDT · 13500 days ago · 0 km deep · 3 km away
45. 2.77 km NE of Hidden Valley Lake, CaliforniaThu, Oct 19, 8:17 AM PDT · 13500 days ago · 6 km deep · 26 km away
46. 1.813 km ENE of Angwin, CaliforniaThu, Oct 19, 8:34 AM PDT · 13500 days ago · 4 km deep · 47 km away
47. 2.48 km W of Cobb, CaliforniaThu, Oct 19, 10:19 AM PDT · 13500 days ago · 1 km deep · 3 km away
48. 1.67 km NE of Rohnert Park, CaliforniaThu, Oct 19, 6:14 PM PDT · 13500 days ago · 5 km deep · 52 km away
49. 1.615 km ENE of Angwin, CaliforniaThu, Oct 19, 7:13 PM PDT · 13500 days ago · 0 km deep · 47 km away
50. 1.95 km W of Cobb, CaliforniaFri, Oct 20, 4:39 AM PDT · 13499 days ago · 1 km deep · 2 km away
51. 1.921 km N of Upper Lake, CaliforniaFri, Oct 20, 10:30 AM PDT · 13499 days ago · 6 km deep · 58 km away
52. 1.67 km WSW of Cobb, CaliforniaSat, Oct 21, 6:11 AM PDT · 13498 days ago · 1 km deep · 3 km away
53. 1.67 km ENE of Lower Lake, CaliforniaSat, Oct 21, 6:56 PM PDT · 13498 days ago · 8 km deep · 25 km away
54. 1.96 km ENE of Lower Lake, CaliforniaSat, Oct 21, 9:54 PM PDT · 13497 days ago · 7 km deep · 24 km away
55. 1.512 km ENE of Cloverdale, CaliforniaSat, Oct 21, 10:52 PM PDT · 13497 days ago · 0 km deep · 7 km away
56. 1.610 km ESE of Hopland, CaliforniaSun, Oct 22, 8:04 AM PDT · 13497 days ago · 6 km deep · 22 km away
57. 2.014 km ENE of Angwin, CaliforniaSun, Oct 22, 10:08 AM PDT · 13497 days ago · 3 km deep · 47 km away
58. 1.610 km ESE of Hidden Valley Lake, CaliforniaSun, Oct 22, 12:21 PM PDT · 13497 days ago · 6 km deep · 30 km away
59. 3.121 km NNE of Upper Lake, CaliforniaSun, Oct 22, 7:22 PM PDT · 13496 days ago · 12 km deep · 58 km away
60. 1.63 km NNW of Windsor, CaliforniaMon, Oct 23, 8:52 AM PDT · 13496 days ago · 6 km deep · 29 km away

The first 60 of 146.

Before

1. 2.45 km WNW of Cobb, CaliforniaSat, Sep 30, 10:32 PM PDT · 13518 days ago · 0 km deep · 0 km away
2. 1.62 km SW of Cottonwood, CaliforniaSat, Sep 30, 8:50 PM PDT · 13518 days ago · 9 km deep · 72 km away
3. 2.12 km ESE of Potter Valley, CaliforniaSat, Sep 30, 8:32 PM PDT · 13518 days ago · 4 km deep · 60 km away
4. 1.84 km WNW of Cobb, CaliforniaSat, Sep 30, 5:41 PM PDT · 13519 days ago · 2 km deep · 1 km away
5. 1.69 km WNW of Cobb, CaliforniaSat, Sep 30, 3:11 PM PDT · 13519 days ago · 1 km deep · 3 km away
6. 1.910 km WSW of Cobb, CaliforniaSat, Sep 30, 7:59 AM PDT · 13519 days ago · 2 km deep · 6 km away
7. 2.56 km W of Cobb, CaliforniaSat, Sep 30, 6:55 AM PDT · 13519 days ago · 3 km deep · 1 km away
8. 1.711 km W of Cobb, CaliforniaSat, Sep 30, 2:22 AM PDT · 13519 days ago · 3 km deep · 6 km away
9. 1.74 km W of Cobb, CaliforniaFri, Sep 29, 10:18 PM PDT · 13519 days ago · 2 km deep · 2 km away
10. 1.57 km W of Cobb, CaliforniaFri, Sep 29, 2:40 PM PDT · 13520 days ago · 0 km deep · 3 km away
11. 1.65 km W of Cobb, CaliforniaFri, Sep 29, 10:37 AM PDT · 13520 days ago · 2 km deep · 1 km away
12. 1.814 km E of Angwin, CaliforniaThu, Sep 28, 5:17 PM PDT · 13521 days ago · 1 km deep · 53 km away
13. 1.93 km W of Cobb, CaliforniaThu, Sep 28, 8:58 AM PDT · 13521 days ago · 0 km deep · 2 km away
14. 1.81 km NW of Brooktrails, CaliforniaWed, Sep 27, 6:11 PM PDT · 13522 days ago · 3 km deep · 87 km away
15. 1.914 km NW of Moskowite Corner, CaliforniaTue, Sep 26, 11:32 PM PDT · 13522 days ago · 2 km deep · 54 km away
16. 1.78 km ENE of Clearlake, CaliforniaTue, Sep 26, 11:00 PM PDT · 13522 days ago · 5 km deep · 27 km away
17. 2.44 km N of Geyserville, CaliforniaTue, Sep 26, 9:27 PM PDT · 13522 days ago · 4 km deep · 13 km away
18. 2.45 km N of Geyserville, CaliforniaTue, Sep 26, 9:26 PM PDT · 13522 days ago · 4 km deep · 13 km away
19. 2.4Northern CaliforniaTue, Sep 26, 8:59 PM PDT · 13522 days ago · 4 km deep · 13 km away
20. 1.613 km NW of Moskowite Corner, CaliforniaTue, Sep 26, 9:38 AM PDT · 13523 days ago · 2 km deep · 55 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc144879. Read Mon, Oct 5, 2026, 1:48 PM UTC.