M2.3 earthquake 7 km WSW of Cobb, California

Magnitude

2.3 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Tue, Mar 24, 1987, 6:05 AM PST

UTC

1987-03-24 14:05:47 UTC

Depth

1.4 km (0.9 mi), shallow

Epicenter

38.804° N, 122.801° 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

±0.15

Depth from

From location

Station coverage gap

101°

Stations used

20

• Cobb, CaliforniaPopulation 1,778. Forecast7 kmWSW
• Healdsburg, CaliforniaPopulation 11,742. Forecast22 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast41 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast667 kmNW

After

1. 1.88 km W of Cobb, CaliforniaWed, Mar 25, 12:43 AM PST · 14435 days ago · 3 km deep · 4 km away
2. 2.08 km W of Cobb, CaliforniaWed, Mar 25, 2:00 AM PST · 14435 days ago · 2 km deep · 4 km away
3. 1.76 km W of Cobb, CaliforniaWed, Mar 25, 2:09 AM PST · 14435 days ago · 1 km deep · 1 km away
4. 1.66 km W of Cobb, CaliforniaWed, Mar 25, 10:51 AM PST · 14435 days ago · 3 km deep · 2 km away
5. 1.75 km WNW of Cobb, CaliforniaThu, Mar 26, 10:37 AM PST · 14434 days ago · 1 km deep · 5 km away
6. 1.89 km ESE of Hidden Valley Lake, CaliforniaThu, Mar 26, 10:45 AM PST · 14434 days ago · 5 km deep · 30 km away
7. 1.81 km WSW of Hopland, CaliforniaThu, Mar 26, 9:46 PM PST · 14433 days ago · 0 km deep · 34 km away
8. 1.59 km NW of Cobb, CaliforniaFri, Mar 27, 5:27 AM PST · 14433 days ago · 1 km deep · 9 km away
9. 2.33 km NE of Anchor Bay, CaliforniaFri, Mar 27, 2:42 PM PST · 14432 days ago · 0 km deep · 65 km away
10. 1.86 km W of Cobb, CaliforniaFri, Mar 27, 9:49 PM PST · 14432 days ago · 3 km deep · 2 km away
11. 1.6Northern CaliforniaSat, Mar 28, 4:15 AM PST · 14432 days ago · 0 km deep · 2 km away
12. 1.77 km W of Cobb, CaliforniaSat, Mar 28, 9:45 AM PST · 14432 days ago · 3 km deep · 1 km away
13. 1.65 km WSW of Cobb, CaliforniaSat, Mar 28, 12:17 PM PST · 14432 days ago · 0 km deep · 2 km away
14. 1.58 km W of Cobb, CaliforniaSat, Mar 28, 4:47 PM PST · 14431 days ago · 1 km deep · 3 km away
15. 1.70 km SSW of Larkfield-Wikiup, CaliforniaSat, Mar 28, 4:51 PM PST · 14431 days ago · 0 km deep · 33 km away
16. 3.05 km WSW of Cobb, CaliforniaSat, Mar 28, 9:26 PM PST · 14431 days ago · 1 km deep · 2 km away
17. 2.16 km WSW of Cobb, CaliforniaSun, Mar 29, 4:08 AM PST · 14431 days ago · 0 km deep · 2 km away
18. 2.54 km WSW of Cobb, CaliforniaSun, Mar 29, 5:53 AM PST · 14431 days ago · -1 km deep · 2 km away
19. 2.06 km WSW of Cobb, CaliforniaSun, Mar 29, 7:37 AM PST · 14431 days ago · 0 km deep · 2 km away
20. 1.55 km SW of Cobb, CaliforniaSun, Mar 29, 12:52 PM PST · 14431 days ago · 2 km deep · 3 km away
21. 2.95 km SW of Cobb, CaliforniaSun, Mar 29, 10:20 PM PST · 14430 days ago · 3 km deep · 3 km away
22. 1.95 km SW of Cobb, CaliforniaTue, Mar 31, 1:09 AM PST · 14429 days ago · 1 km deep · 3 km away
23. 1.76 km W of Cobb, CaliforniaTue, Mar 31, 4:51 AM PST · 14429 days ago · 3 km deep · 1 km away
24. 2.615 km W of Guinda, CaliforniaTue, Mar 31, 2:55 PM PST · 14428 days ago · -1 km deep · 37 km away
25. 1.64 km ESE of Boonville, CATue, Mar 31, 8:46 PM PST · 14428 days ago · 4 km deep · 50 km away
26. 1.84 km ESE of Boonville, CaliforniaTue, Mar 31, 11:33 PM PST · 14428 days ago · 5 km deep · 50 km away
27. 1.63 km ESE of Boonville, CaliforniaWed, Apr 1, 6:21 AM PST · 14428 days ago · 5 km deep · 50 km away
28. 2.96 km WSW of Cobb, CaliforniaWed, Apr 1, 1:42 PM PST · 14428 days ago · 4 km deep · 1 km away
29. 2.06 km SW of Cobb, CaliforniaWed, Apr 1, 2:02 PM PST · 14428 days ago · -1 km deep · 3 km away
30. 1.77 km W of Cobb, CaliforniaThu, Apr 2, 1:40 AM PST · 14427 days ago · 0 km deep · 1 km away
31. 1.67 km W of Cobb, CaliforniaThu, Apr 2, 2:18 PM PST · 14427 days ago · 2 km deep · 2 km away
32. 1.613 km ESE of Hidden Valley Lake, CaliforniaThu, Apr 2, 3:40 PM PST · 14426 days ago · 3 km deep · 33 km away
33. 2.16 km W of Cobb, CaliforniaFri, Apr 3, 5:41 AM PST · 14426 days ago · 4 km deep · 2 km away
34. 1.93 km ESE of Kenwood, CaliforniaFri, Apr 3, 12:54 PM PST · 14426 days ago · 0 km deep · 52 km away
35. 1.79 km W of Cobb, CaliforniaFri, Apr 3, 10:53 PM PST · 14425 days ago · 0 km deep · 4 km away
36. 1.84 km WSW of Cobb, CaliforniaSat, Apr 4, 3:05 AM PST · 14425 days ago · 1 km deep · 3 km away
37. 1.68 km W of Cobb, CaliforniaSat, Apr 4, 8:31 AM PST · 14425 days ago · 1 km deep · 4 km away
38. 1.64 km WSW of Cobb, CaliforniaSat, Apr 4, 6:27 PM PST · 14424 days ago · 0 km deep · 3 km away
39. 1.66 km SW of Cobb, CaliforniaSun, Apr 5, 6:33 AM PDT · 14424 days ago · 1 km deep · 3 km away
40. 1.94 km WSW of Cobb, CaliforniaMon, Apr 6, 6:45 PM PDT · 14422 days ago · 2 km deep · 2 km away
41. 1.76 km W of Cobb, CaliforniaTue, Apr 7, 11:35 AM PDT · 14422 days ago · 3 km deep · 2 km away
42. 1.57 km WSW of Cobb, CaliforniaTue, Apr 7, 11:36 AM PDT · 14422 days ago · 3 km deep · 1 km away
43. 1.66 km W of Cobb, CaliforniaTue, Apr 7, 4:22 PM PDT · 14421 days ago · 3 km deep · 2 km away
44. 1.68 km WSW of Cobb, CaliforniaTue, Apr 7, 5:51 PM PDT · 14421 days ago · 3 km deep · 2 km away
45. 1.65 km SW of Cobb, CaliforniaTue, Apr 7, 6:30 PM PDT · 14421 days ago · 0 km deep · 3 km away
46. 1.611 km S of Kelseyville, CaliforniaWed, Apr 8, 2:24 PM PDT · 14421 days ago · 0 km deep · 9 km away
47. 2.45 km WNW of Cobb, CaliforniaWed, Apr 8, 8:03 PM PDT · 14420 days ago · 1 km deep · 4 km away
48. 1.8Northern CaliforniaWed, Apr 8, 9:15 PM PDT · 14420 days ago · 6 km deep · 26 km away
49. 2.96 km ENE of Willits, CaliforniaThu, Apr 9, 3:32 PM PDT · 14419 days ago · 4 km deep · 81 km away
50. 1.76 km ENE of Willits, CaliforniaThu, Apr 9, 3:33 PM PDT · 14419 days ago · 3 km deep · 81 km away
51. 1.56 km ENE of Willits, CaliforniaThu, Apr 9, 3:35 PM PDT · 14419 days ago · 4 km deep · 82 km away
52. 2.86 km ENE of Willits, CaliforniaThu, Apr 9, 3:42 PM PDT · 14419 days ago · 3 km deep · 81 km away
53. 2.56 km ENE of Willits, CaliforniaThu, Apr 9, 3:43 PM PDT · 14419 days ago · 3 km deep · 81 km away
54. 2.36 km ENE of Willits, CaliforniaThu, Apr 9, 3:53 PM PDT · 14419 days ago · 3 km deep · 81 km away
55. 1.76 km ENE of Willits, CaliforniaThu, Apr 9, 3:54 PM PDT · 14419 days ago · 3 km deep · 81 km away
56. 1.83 km SW of Cobb, CaliforniaThu, Apr 9, 4:36 PM PDT · 14419 days ago · 0 km deep · 5 km away
57. 1.720 km ENE of Potter Valley, CaliforniaThu, Apr 9, 8:36 PM PDT · 14419 days ago · 7 km deep · 67 km away
58. 1.67 km ENE of Talmage, CaliforniaFri, Apr 10, 1:23 AM PDT · 14419 days ago · 4 km deep · 47 km away
59. 1.64 km WSW of Cobb, CaliforniaFri, Apr 10, 8:15 AM PDT · 14419 days ago · 2 km deep · 2 km away
60. 2.66 km W of Cobb, CaliforniaSat, Apr 11, 11:11 AM PDT · 14418 days ago · 3 km deep · 2 km away

The first 60 of 170.

Before

1. 1.74 km W of Cobb, CaliforniaMon, Mar 23, 1:48 PM PST · 14437 days ago · 0 km deep · 3 km away
2. 3.17 km WSW of Cobb, CaliforniaMon, Mar 23, 8:44 AM PST · 14437 days ago · 1 km deep · 0 km away
3. 1.610 km W of Cobb, CaliforniaMon, Mar 23, 3:12 AM PST · 14437 days ago · 4 km deep · 5 km away
4. 2.16 km SW of Cobb, CaliforniaMon, Mar 23, 1:30 AM PST · 14437 days ago · 0 km deep · 3 km away
5. 1.65 km W of Cobb, CaliforniaSun, Mar 22, 10:08 PM PST · 14437 days ago · 1 km deep · 3 km away
6. 1.65 km SW of Cobb, CaliforniaSun, Mar 22, 8:37 PM PST · 14437 days ago · 3 km deep · 4 km away
7. 1.55 km SW of Cobb, CaliforniaSun, Mar 22, 12:53 PM PST · 14438 days ago · 1 km deep · 4 km away
8. 1.66 km SW of Cobb, CaliforniaSun, Mar 22, 12:32 PM PST · 14438 days ago · 1 km deep · 3 km away
9. 1.58 km WSW of Cobb, CaliforniaSun, Mar 22, 3:25 AM PST · 14438 days ago · 11 km deep · 2 km away
10. 1.69 km W of Cobb, CaliforniaSat, Mar 21, 6:27 PM PST · 14438 days ago · 8 km deep · 3 km away
11. 2.66 km W of Cobb, CaliforniaSat, Mar 21, 6:04 AM PST · 14439 days ago · 4 km deep · 1 km away
12. 1.85 km WSW of Cobb, CaliforniaSat, Mar 21, 5:59 AM PST · 14439 days ago · 2 km deep · 2 km away
13. 1.56 km NE of Geyserville, CaliforniaFri, Mar 20, 7:58 PM PST · 14439 days ago · 5 km deep · 8 km away
14. 2.33 km ENE of Anchor Bay, CaliforniaFri, Mar 20, 6:18 AM PST · 14440 days ago · 11 km deep · 65 km away
15. 3.07 km W of Cobb, CaliforniaFri, Mar 20, 12:36 AM PST · 14440 days ago · 4 km deep · 2 km away
16. 1.67 km W of Cobb, CaliforniaThu, Mar 19, 3:24 PM PST · 14440 days ago · 0 km deep · 2 km away
17. 1.76 km W of Cobb, CaliforniaWed, Mar 18, 9:34 PM PST · 14441 days ago · 3 km deep · 1 km away
18. 2.26 km W of Cobb, CaliforniaWed, Mar 18, 9:19 PM PST · 14441 days ago · 4 km deep · 1 km away
19. 2.06 km W of Cobb, CaliforniaWed, Mar 18, 8:18 PM PST · 14441 days ago · 3 km deep · 2 km away
20. 1.69 km SSW of Cloverdale, CaliforniaWed, Mar 18, 3:37 AM PST · 14442 days ago · 7 km deep · 25 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc97339. Read Thu, Oct 1, 2026, 9:48 AM UTC.