M2.3 earthquake 19 km NNE of Upper Lake, California

Magnitude

2.3 (md), micro

Local time

Sun, Nov 20, 1983, 1:12 AM PST

UTC

1983-11-20 09:12:11 UTC

Depth

7.1 km (4.4 mi), shallow

Epicenter

39.310° N, 122.792° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 1.3 km in depth

Magnitude uncertainty

±0.15

Depth from

From location

Station coverage gap

76°

Stations used

14

• Upper Lake, CaliforniaPopulation 1,052. Forecast19 kmNNE
• Ukiah, CaliforniaPopulation 15,917. Forecast40 kmENE
• Chico, CaliforniaPopulation 121,345. Forecast94 kmWSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast711 kmNNW

After

1. 2.96 km W of Cobb, CaliforniaThu, Nov 24, 10:39 AM PST · 15643 days ago · 3 km deep · 54 km away
2. 1.77 km W of Cobb, CaliforniaThu, Nov 24, 10:39 PM PST · 15643 days ago · 3 km deep · 55 km away
3. 1.65 km WSW of Cobb, CaliforniaFri, Nov 25, 9:32 AM PST · 15642 days ago · 1 km deep · 56 km away
4. 2.16 km WSW of Cobb, CaliforniaFri, Nov 25, 7:25 PM PST · 15642 days ago · 3 km deep · 57 km away
5. 1.66 km W of Cobb, CaliforniaFri, Nov 25, 7:53 PM PST · 15642 days ago · 1 km deep · 54 km away
6. 2.018 km NE of Upper Lake, CaliforniaFri, Nov 25, 8:42 PM PST · 15642 days ago · 7 km deep · 1 km away
7. 2.57 km WSW of Cobb, CaliforniaSat, Nov 26, 12:43 AM PST · 15642 days ago · 1 km deep · 56 km away
8. 1.78 km W of Cobb, CaliforniaSat, Nov 26, 12:44 AM PST · 15642 days ago · -1 km deep · 56 km away
9. 1.67 km WSW of Cobb, CaliforniaSat, Nov 26, 12:45 AM PST · 15642 days ago · 1 km deep · 56 km away
10. 2.013 km NNE of Brooktrails, CaliforniaSat, Nov 26, 3:51 AM PST · 15641 days ago · 2 km deep · 55 km away
11. 1.67 km W of Cobb, CaliforniaSat, Nov 26, 5:46 AM PST · 15641 days ago · 1 km deep · 55 km away
12. 2.4Northern CaliforniaSat, Nov 26, 5:47 AM PST · 15641 days ago · 1 km deep · 55 km away
13. 1.78 km W of Cobb, CaliforniaSat, Nov 26, 5:47 AM PST · 15641 days ago · 1 km deep · 55 km away
14. 1.88 km W of Cobb, CaliforniaSat, Nov 26, 5:48 AM PST · 15641 days ago · -1 km deep · 55 km away
15. 3.06 km WSW of Cobb, CaliforniaSat, Nov 26, 11:53 AM PST · 15641 days ago · 3 km deep · 56 km away
16. 2.23 km S of Clear Lake Riviera, CaliforniaSat, Nov 26, 4:52 PM PST · 15641 days ago · 3 km deep · 44 km away
17. 2.66 km W of Cobb, CaliforniaSun, Nov 27, 7:59 AM PST · 15640 days ago · 0 km deep · 55 km away
18. 2.26 km W of Cobb, CaliforniaSun, Nov 27, 8:00 AM PST · 15640 days ago · 1 km deep · 55 km away
19. 1.62 km ESE of North Lakeport, CaliforniaSun, Nov 27, 5:16 PM PST · 15640 days ago · 18 km deep · 27 km away
20. 2.16 km W of Cobb, CaliforniaMon, Nov 28, 4:32 AM PST · 15639 days ago · 3 km deep · 55 km away
21. 2.36 km W of Cobb, CaliforniaMon, Nov 28, 4:36 AM PST · 15639 days ago · 3 km deep · 55 km away
22. 1.67 km W of Cobb, CaliforniaMon, Nov 28, 4:54 AM PST · 15639 days ago · 3 km deep · 55 km away
23. 2.16 km WSW of Cobb, CaliforniaMon, Nov 28, 10:37 AM PST · 15639 days ago · 1 km deep · 56 km away
24. 1.919 km ENE of Potter Valley, CaliforniaMon, Nov 28, 10:43 AM PST · 15639 days ago · 7 km deep · 10 km away
25. 1.51 km NNW of Calpella, CaliforniaMon, Nov 28, 12:02 PM PST · 15639 days ago · 6 km deep · 36 km away
26. 1.67 km W of Cobb, CaliforniaMon, Nov 28, 6:46 PM PST · 15639 days ago · 0 km deep · 54 km away
27. 2.15 km SSW of Laytonville, CaliforniaTue, Nov 29, 6:35 PM PST · 15638 days ago · 4 km deep · 71 km away
28. 1.612 km NNW of Moskowite Corner, CaliforniaTue, Nov 29, 8:46 PM PST · 15638 days ago · 18 km deep · 98 km away
29. 1.57 km W of Cobb, CaliforniaWed, Nov 30, 4:06 PM PST · 15637 days ago · 3 km deep · 56 km away
30. 2.68 km E of Willits, CaliforniaWed, Nov 30, 4:32 PM PST · 15637 days ago · 4 km deep · 41 km away
31. 1.67 km W of Cobb, CaliforniaWed, Nov 30, 4:51 PM PST · 15637 days ago · 3 km deep · 56 km away
32. 2.13 km SE of Calpella, CaliforniaThu, Dec 1, 10:56 AM PST · 15636 days ago · 2 km deep · 35 km away
33. 2.12 km SE of Calpella, CaliforniaThu, Dec 1, 4:18 PM PST · 15636 days ago · 5 km deep · 35 km away
34. 2.24 km SSW of Laytonville, CaliforniaFri, Dec 2, 12:38 AM PST · 15636 days ago · 5 km deep · 72 km away
35. 1.7near the coast of Northern CaliforniaFri, Dec 2, 12:53 AM PST · 15636 days ago · 3 km deep · 73 km away
36. 1.620 km NE of Potter Valley, CaliforniaFri, Dec 2, 1:33 AM PST · 15636 days ago · 10 km deep · 21 km away
37. 2.05 km SSW of Laytonville, CaliforniaFri, Dec 2, 10:17 AM PST · 15635 days ago · 3 km deep · 72 km away
38. 1.817 km E of Lower Lake, CaliforniaFri, Dec 2, 4:54 PM PST · 15635 days ago · 3 km deep · 53 km away
39. 1.95 km WSW of Cobb, CaliforniaSat, Dec 3, 1:27 AM PST · 15635 days ago · -1 km deep · 57 km away
40. 2.04 km SW of Cobb, CaliforniaSat, Dec 3, 1:47 AM PST · 15635 days ago · 1 km deep · 57 km away
41. 2.05 km WSW of Cobb, CaliforniaSat, Dec 3, 1:52 AM PST · 15635 days ago · 0 km deep · 57 km away
42. 1.77 km W of Cobb, CaliforniaSat, Dec 3, 6:33 PM PST · 15634 days ago · 2 km deep · 55 km away
43. 1.94 km W of Cobb, CaliforniaSat, Dec 3, 6:39 PM PST · 15634 days ago · -1 km deep · 54 km away
44. 1.76 km W of Cobb, CaliforniaSat, Dec 3, 9:05 PM PST · 15634 days ago · 2 km deep · 53 km away
45. 1.66 km W of Cobb, CaliforniaSun, Dec 4, 12:43 PM PST · 15633 days ago · 3 km deep · 55 km away
46. 2.45 km E of Willits, CaliforniaSun, Dec 4, 4:19 PM PST · 15633 days ago · 4 km deep · 45 km away
47. 2.45 km ENE of Willits, CaliforniaSun, Dec 4, 11:03 PM PST · 15633 days ago · 2 km deep · 45 km away
48. 1.78 km N of Princeton, CaliforniaMon, Dec 5, 12:18 AM PST · 15633 days ago · 24 km deep · 69 km away
49. 1.56 km W of Cobb, CaliforniaMon, Dec 5, 2:55 AM PST · 15633 days ago · 3 km deep · 54 km away
50. 1.76 km W of Cobb, CaliforniaMon, Dec 5, 5:00 AM PST · 15632 days ago · 3 km deep · 54 km away
51. 1.77 km WSW of Cobb, CaliforniaMon, Dec 5, 10:28 AM PST · 15632 days ago · 1 km deep · 56 km away
52. 1.67 km W of Cobb, CaliforniaTue, Dec 6, 7:24 AM PST · 15631 days ago · 3 km deep · 55 km away
53. 1.57 km E of Willits, CaliforniaTue, Dec 6, 12:09 PM PST · 15631 days ago · 9 km deep · 42 km away
54. 1.57 km W of Cobb, CaliforniaTue, Dec 6, 6:36 PM PST · 15631 days ago · 3 km deep · 56 km away
55. 1.76 km W of Cobb, CaliforniaTue, Dec 6, 6:55 PM PST · 15631 days ago · 3 km deep · 55 km away
56. 1.714 km NNE of Angwin, CaliforniaTue, Dec 6, 7:42 PM PST · 15631 days ago · 9 km deep · 77 km away
57. 1.68 km W of Cobb, CaliforniaWed, Dec 7, 3:44 AM PST · 15630 days ago · 0 km deep · 55 km away
58. 2.76 km WSW of Cobb, CaliforniaWed, Dec 7, 8:10 AM PST · 15630 days ago · 0 km deep · 57 km away
59. 1.6Northern CaliforniaWed, Dec 7, 9:43 AM PST · 15630 days ago · 1 km deep · 47 km away
60. 1.77 km WSW of Cobb, CaliforniaThu, Dec 8, 12:52 AM PST · 15630 days ago · 0 km deep · 56 km away

The first 60 of 191.

From the USGS Earthquake Hazards Program and its partner networks, event nc1107193. Read Tue, Sep 22, 2026, 10:29 PM UTC.