M1.6 earthquake 1 km NNW of Middletown, California

Magnitude

1.6 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Tue, Aug 19, 1980, 4:15 AM PDT

UTC

1980-08-19 11:15:19 UTC

Depth

5.5 km (3.4 mi), shallow

Epicenter

38.761° N, 122.622° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 1.9 km in depth

Magnitude uncertainty

±0.08

Depth from

From location

Station coverage gap

112°

Stations used

13

• Middletown, CaliforniaPopulation 1,323. Forecast1 kmNNW
• Clearlake, CaliforniaPopulation 15,182. Forecast22 kmS
• Santa Rosa, CaliforniaPopulation 178,127. Forecast36 kmNNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast654 kmNW

After

1. 2.76 km WSW of Cobb, CaliforniaTue, Aug 19, 12:02 PM PDT · 16847 days ago · 0 km deep · 16 km away
2. 1.94 km NW of Redwood Valley, CaliforniaWed, Aug 20, 8:20 PM PDT · 16845 days ago · 5 km deep · 80 km away
3. 3.35km ESE of Arbuckle, CAThu, Aug 21, 12:19 PM PDT · 16845 days ago · 6 km deep · 60 km away
4. 2.27 km W of Cobb, CaliforniaThu, Aug 21, 2:23 PM PDT · 16845 days ago · 1 km deep · 17 km away
5. 2.16 km WSW of Cobb, CaliforniaThu, Aug 21, 2:26 PM PDT · 16845 days ago · 0 km deep · 16 km away
6. 2.67 km WSW of Cobb, CaliforniaThu, Aug 21, 2:27 PM PDT · 16845 days ago · -1 km deep · 17 km away
7. 1.76 km W of Cobb, CaliforniaThu, Aug 21, 2:28 PM PDT · 16845 days ago · 0 km deep · 17 km away
8. 2.17 km WSW of Cobb, CaliforniaThu, Aug 21, 2:28 PM PDT · 16845 days ago · 0 km deep · 17 km away
9. 2.319 km NE of Potter Valley, CaliforniaThu, Aug 21, 3:37 PM PDT · 16844 days ago · 7 km deep · 82 km away
10. 1.67 km WSW of Cobb, CaliforniaFri, Aug 22, 4:19 PM PDT · 16843 days ago · 1 km deep · 17 km away
11. 1.63 km E of Santa Rosa, CaliforniaFri, Aug 22, 4:29 PM PDT · 16843 days ago · 0 km deep · 35 km away
12. 1.97 km E of Larkfield-Wikiup, CaliforniaFri, Aug 22, 11:39 PM PDT · 16843 days ago · 5 km deep · 28 km away
13. 2.94 km SW of Cobb, CaliforniaSat, Aug 23, 8:27 AM PDT · 16843 days ago · 4 km deep · 13 km away
14. 2.87 km WSW of Cobb, CaliforniaSat, Aug 23, 10:27 AM PDT · 16843 days ago · 2 km deep · 17 km away
15. 1.77 km W of Cobb, CaliforniaSat, Aug 23, 10:26 PM PDT · 16842 days ago · 3 km deep · 18 km away
16. 2.16 km W of Cobb, CaliforniaSun, Aug 24, 4:42 AM PDT · 16842 days ago · 1 km deep · 17 km away
17. 2.13 km NW of Sea Ranch, CaliforniaSun, Aug 24, 4:46 AM PDT · 16842 days ago · 2 km deep · 75 km away
18. 2.64 km WSW of Cobb, CaliforniaSun, Aug 24, 8:35 AM PDT · 16842 days ago · 2 km deep · 13 km away
19. 1.618 km N of Upper Lake, CaliforniaSun, Aug 24, 2:23 PM PDT · 16842 days ago · 5 km deep · 68 km away
20. 1.611 km E of Hidden Valley Lake, CaliforniaSun, Aug 24, 7:45 PM PDT · 16841 days ago · 8 km deep · 18 km away
21. 1.612 km E of Hidden Valley Lake, CaliforniaSun, Aug 24, 7:53 PM PDT · 16841 days ago · 10 km deep · 20 km away
22. 1.611 km E of Hidden Valley Lake, CaliforniaSun, Aug 24, 8:00 PM PDT · 16841 days ago · 8 km deep · 18 km away
23. 1.810 km E of Hidden Valley Lake, CaliforniaSun, Aug 24, 9:15 PM PDT · 16841 days ago · 9 km deep · 18 km away
24. 1.66 km W of Cobb, CaliforniaMon, Aug 25, 4:27 PM PDT · 16840 days ago · 3 km deep · 16 km away
25. 1.66 km W of Cobb, CaliforniaMon, Aug 25, 4:44 PM PDT · 16840 days ago · 3 km deep · 17 km away
26. 2.111 km E of Hidden Valley Lake, CaliforniaTue, Aug 26, 9:24 AM PDT · 16840 days ago · 9 km deep · 18 km away
27. 2.19 km WSW of Cobb, CaliforniaTue, Aug 26, 1:16 PM PDT · 16840 days ago · 2 km deep · 18 km away
28. 1.96 km W of Cobb, CaliforniaWed, Aug 27, 12:14 AM PDT · 16839 days ago · 4 km deep · 16 km away
29. 1.82 km W of Green Valley, CaliforniaThu, Aug 28, 12:23 PM PDT · 16838 days ago · 5 km deep · 68 km away
30. 1.61 km NW of Green Valley, CaliforniaThu, Aug 28, 3:43 PM PDT · 16837 days ago · 4 km deep · 67 km away
31. 1.66 km W of Cobb, CaliforniaThu, Aug 28, 3:53 PM PDT · 16837 days ago · 3 km deep · 17 km away
32. 2.12 km W of Green Valley, CaliforniaFri, Aug 29, 3:37 AM PDT · 16837 days ago · 6 km deep · 68 km away
33. 2.20 km W of Green Valley, CaliforniaFri, Aug 29, 9:57 AM PDT · 16837 days ago · 10 km deep · 69 km away
34. 2.91 km W of Green Valley, CaliforniaFri, Aug 29, 10:16 AM PDT · 16837 days ago · 9 km deep · 68 km away
35. 1.66 km WSW of Cobb, CaliforniaFri, Aug 29, 7:24 PM PDT · 16836 days ago · 1 km deep · 16 km away
36. 2.37 km W of Cobb, CaliforniaSat, Aug 30, 1:07 AM PDT · 16836 days ago · 2 km deep · 18 km away
37. 1.76 km W of Cobb, CaliforniaSat, Aug 30, 6:43 PM PDT · 16835 days ago · 0 km deep · 16 km away
38. 1.96 km WSW of Cobb, CaliforniaWed, Sep 3, 11:07 PM PDT · 16831 days ago · 1 km deep · 16 km away
39. 1.99 km WSW of Cobb, CaliforniaFri, Sep 12, 7:22 PM PDT · 16822 days ago · 1 km deep · 19 km away
40. 1.65 km SE of Santa Rosa, CaliforniaMon, Sep 15, 8:32 AM PDT · 16820 days ago · 8 km deep · 39 km away
41. 1.86 km WNW of Cobb, CaliforniaMon, Sep 15, 8:57 AM PDT · 16820 days ago · 1 km deep · 17 km away
42. 1.66 km WSW of Cobb, CaliforniaMon, Sep 15, 6:03 PM PDT · 16819 days ago · 0 km deep · 16 km away
43. 1.66 km WSW of Cobb, CaliforniaTue, Sep 16, 7:19 AM PDT · 16819 days ago · 1 km deep · 16 km away
44. 1.66 km WSW of Cobb, CaliforniaTue, Sep 16, 7:19 AM PDT · 16819 days ago · 0 km deep · 16 km away
45. 3.06 km WSW of Cobb, CaliforniaTue, Sep 16, 7:19 AM PDT · 16819 days ago · 0 km deep · 16 km away
46. 1.66 km W of Cobb, CaliforniaTue, Sep 16, 7:21 AM PDT · 16819 days ago · 0 km deep · 16 km away
47. 1.87 km ESE of Willits, CaliforniaTue, Sep 16, 7:41 AM PDT · 16819 days ago · 6 km deep · 90 km away
48. 1.69 km SE of Willits, CaliforniaWed, Sep 17, 12:29 PM PDT · 16818 days ago · 1 km deep · 86 km away
49. 1.55 km E of Calpella, CaliforniaWed, Sep 17, 7:18 PM PDT · 16817 days ago · 6 km deep · 69 km away
50. 1.511 km NNW of Potter Valley, CaliforniaThu, Sep 18, 2:33 PM PDT · 16816 days ago · 8 km deep · 87 km away
51. 1.93 km SW of Lagunitas-Forest Knolls, CaliforniaThu, Sep 18, 7:26 PM PDT · 16816 days ago · 6 km deep · 85 km away
52. 1.625 km NE of Potter Valley, CaliforniaThu, Sep 18, 11:00 PM PDT · 16816 days ago · 3 km deep · 85 km away
53. 1.617 km SW of Stonyford, CaliforniaFri, Sep 19, 5:17 AM PDT · 16816 days ago · 9 km deep · 58 km away
54. 1.6Northern CaliforniaFri, Sep 19, 1:04 PM PDT · 16816 days ago · 1 km deep · 14 km away
55. 2.96 km W of Cobb, CaliforniaFri, Sep 19, 11:37 PM PDT · 16815 days ago · 4 km deep · 16 km away
56. 2.018 km E of Potter Valley, CaliforniaSat, Sep 20, 1:40 PM PDT · 16815 days ago · 6 km deep · 68 km away
57. 1.918 km ENE of Potter Valley, CaliforniaSat, Sep 20, 5:05 PM PDT · 16814 days ago · 6 km deep · 75 km away
58. 1.84 km NNE of Cobb, CaliforniaSat, Sep 20, 6:33 PM PDT · 16814 days ago · 4 km deep · 14 km away
59. 1.64 km N of Cobb, CaliforniaSat, Sep 20, 6:40 PM PDT · 16814 days ago · 4 km deep · 14 km away
60. 1.619 km NE of Upper Lake, CaliforniaSun, Sep 21, 3:52 PM PDT · 16813 days ago · 9 km deep · 62 km away

The first 60 of 104.

Before

1. 2.18 km SSE of Middletown, CaliforniaMon, Aug 18, 7:42 AM PDT · 16848 days ago · 8 km deep · 10 km away
2. 1.76 km W of Cobb, CaliforniaSun, Aug 17, 7:12 PM PDT · 16848 days ago · 3 km deep · 16 km away
3. 1.819 km ENE of Potter Valley, CaliforniaSat, Aug 16, 4:10 AM PDT · 16850 days ago · 5 km deep · 75 km away
4. 1.820 km NE of Potter Valley, CaliforniaSat, Aug 16, 1:00 AM PDT · 16850 days ago · 2 km deep · 83 km away
5. 2.56 km E of Geyserville, CaliforniaThu, Aug 14, 1:43 PM PDT · 16852 days ago · 3 km deep · 19 km away
6. 1.59 km NW of Redwood Valley, CaliforniaThu, Aug 14, 7:02 AM PDT · 16852 days ago · 2 km deep · 85 km away
7. 1.88 km SE of Willits, CaliforniaThu, Aug 14, 1:32 AM PDT · 16852 days ago · 8 km deep · 87 km away
8. 1.84 km E of Geyserville, CaliforniaTue, Aug 12, 10:34 PM PDT · 16853 days ago · 3 km deep · 21 km away
9. 1.88 km SSW of Arbuckle, CaliforniaTue, Aug 12, 8:06 PM PDT · 16853 days ago · 16 km deep · 51 km away
10. 1.65 km E of Santa Rosa, CaliforniaMon, Aug 11, 7:51 PM PDT · 16854 days ago · 0 km deep · 35 km away
11. 1.86 km WSW of Calistoga, CaliforniaSun, Aug 10, 2:17 PM PDT · 16856 days ago · 0 km deep · 22 km away
12. 2.629 km SE of Covelo, CaliforniaSun, Aug 10, 10:10 AM PDT · 16856 days ago · 15 km deep · 100 km away
13. 1.929 km SE of Covelo, CaliforniaSun, Aug 10, 10:01 AM PDT · 16856 days ago · 13 km deep · 100 km away
14. 2.56 km WSW of Cobb, CaliforniaSat, Aug 9, 9:04 PM PDT · 16856 days ago · 1 km deep · 16 km away
15. 1.87 km E of Willits, CaliforniaSat, Aug 9, 4:31 AM PDT · 16857 days ago · 7 km deep · 91 km away
16. 1.77 km WSW of Cobb, CaliforniaSat, Aug 9, 2:39 AM PDT · 16857 days ago · 2 km deep · 17 km away
17. 1.67 km WSW of Cobb, CaliforniaFri, Aug 8, 11:33 PM PDT · 16857 days ago · 2 km deep · 17 km away
18. 2.47 km WSW of Cobb, CaliforniaFri, Aug 8, 7:17 AM PDT · 16858 days ago · 1 km deep · 17 km away
19. 2.44 km WSW of Cobb, CaliforniaFri, Aug 8, 7:12 AM PDT · 16858 days ago · 2 km deep · 14 km away
20. 1.625 km ENE of Potter Valley, CaliforniaThu, Aug 7, 3:32 PM PDT · 16858 days ago · 11 km deep · 76 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1055152. Read Sun, Oct 4, 2026, 9:01 AM UTC.