M1.8 earthquake 12 km NE of Upper Lake, California

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sun, Jun 11, 1978, 5:31 AM PDT

UTC

1978-06-11 12:31:12 UTC

Depth

0.9 km (0.6 mi), shallow

Epicenter

39.238° N, 122.796° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.1 km horizontally, 7.8 km in depth

Magnitude uncertainty

±0.06

Depth from

From location

Station coverage gap

223°, poorly surrounded by stations

Stations used

8

• Upper Lake, CaliforniaPopulation 1,052. Forecast13 kmNE
• Clearlake, CaliforniaPopulation 15,182. Forecast34 kmNNW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast89 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast705 kmNW

After

1. 1.63 km NNE of Nice, CaliforniaMon, Jun 12, 9:13 PM PDT · 17646 days ago · 7 km deep · 10 km away
2. 1.73 km E of Calpella, CaliforniaWed, Jun 14, 9:05 PM PDT · 17644 days ago · 4 km deep · 32 km away
3. 1.7Northern CaliforniaWed, Jun 14, 9:53 PM PDT · 17644 days ago · 11 km deep · 7 km away
4. 1.56 km W of Cobb, CaliforniaThu, Jun 15, 5:55 AM PDT · 17643 days ago · 3 km deep · 47 km away
5. 1.86 km W of Cobb, CaliforniaThu, Jun 15, 2:14 PM PDT · 17643 days ago · 3 km deep · 46 km away
6. 2.87 km W of Cobb, CaliforniaSun, Jun 18, 8:06 AM PDT · 17640 days ago · 4 km deep · 46 km away
7. 1.69 km W of Cobb, CaliforniaSun, Jun 18, 9:46 AM PDT · 17640 days ago · 1 km deep · 47 km away
8. 1.611 km NW of Moskowite Corner, CaliforniaSun, Jun 18, 1:34 PM PDT · 17640 days ago · 16 km deep · 91 km away
9. 2.413 km N of Potter Valley, CaliforniaTue, Jun 20, 2:08 AM PDT · 17638 days ago · 8 km deep · 37 km away
10. 1.74 km E of Calpella, CaliforniaWed, Jun 21, 12:18 AM PDT · 17638 days ago · 4 km deep · 31 km away
11. 2.66 km W of Cobb, CaliforniaFri, Jun 23, 7:14 AM PDT · 17635 days ago · 3 km deep · 47 km away
12. 1.6Northern CaliforniaFri, Jun 23, 11:43 AM PDT · 17635 days ago · 4 km deep · 47 km away
13. 1.5Northern CaliforniaFri, Jun 23, 12:06 PM PDT · 17635 days ago · 5 km deep · 69 km away
14. 2.36 km W of Cobb, CaliforniaSun, Jun 25, 7:33 AM PDT · 17633 days ago · 4 km deep · 47 km away
15. 1.64 km SSW of Hamilton City, CaliforniaTue, Jun 27, 12:46 AM PDT · 17632 days ago · 17 km deep · 83 km away
16. 1.63 km NNE of Cloverdale, CaliforniaTue, Jun 27, 11:40 AM PDT · 17631 days ago · 5 km deep · 48 km away
17. 2.48 km W of Cobb, CaliforniaTue, Jun 27, 5:52 PM PDT · 17631 days ago · -1 km deep · 47 km away
18. 1.66 km E of Calpella, CaliforniaWed, Jun 28, 2:36 AM PDT · 17630 days ago · 4 km deep · 29 km away
19. 1.96 km WNW of Cobb, CaliforniaWed, Jun 28, 3:39 PM PDT · 17630 days ago · 2 km deep · 45 km away
20. 1.68 km WSW of Cobb, CaliforniaSat, Jul 1, 2:23 AM PDT · 17627 days ago · 1 km deep · 48 km away
21. 1.97 km W of Cobb, CaliforniaSat, Jul 1, 6:35 AM PDT · 17627 days ago · 3 km deep · 46 km away
22. 1.65 km N of Larkfield-Wikiup, CaliforniaSat, Jul 1, 6:38 AM PDT · 17627 days ago · 5 km deep · 75 km away
23. 2.610 km ENE of Healdsburg, CaliforniaMon, Jul 3, 10:58 AM PDT · 17625 days ago · 7 km deep · 64 km away
24. 2.317 km NNE of Nice, CaliforniaMon, Jul 3, 1:14 PM PDT · 17625 days ago · 11 km deep · 5 km away
25. 1.817 km NNE of Nice, CaliforniaMon, Jul 3, 1:26 PM PDT · 17625 days ago · 9 km deep · 5 km away
26. 1.711 km NE of Healdsburg, CaliforniaMon, Jul 3, 3:11 PM PDT · 17625 days ago · 6 km deep · 63 km away
27. 1.511 km NE of Healdsburg, CaliforniaTue, Jul 4, 4:15 AM PDT · 17624 days ago · 4 km deep · 62 km away
28. 1.57 km W of Cobb, CaliforniaWed, Jul 5, 12:31 AM PDT · 17624 days ago · 1 km deep · 47 km away
29. 1.67 km W of Cobb, CaliforniaWed, Jul 5, 11:23 AM PDT · 17623 days ago · 4 km deep · 48 km away
30. 1.611 km ENE of Healdsburg, CaliforniaThu, Jul 6, 10:14 PM PDT · 17622 days ago · 5 km deep · 64 km away
31. 1.74 km WSW of Cobb, CaliforniaSun, Jul 9, 10:27 PM PDT · 17619 days ago · 4 km deep · 49 km away
32. 2.07 km WSW of Cobb, CaliforniaTue, Jul 11, 9:11 AM PDT · 17617 days ago · -1 km deep · 49 km away
33. 1.97 km WSW of Cobb, CaliforniaTue, Jul 11, 9:11 AM PDT · 17617 days ago · 2 km deep · 49 km away
34. 2.216 km ENE of Willows, CaliforniaWed, Jul 12, 3:07 AM PDT · 17616 days ago · 20 km deep · 77 km away
35. 2.07 km W of Cobb, CaliforniaWed, Jul 12, 9:55 PM PDT · 17616 days ago · 4 km deep · 46 km away
36. 2.33 km SW of Oakville, CaliforniaFri, Jul 14, 2:06 PM PDT · 17614 days ago · 9 km deep · 97 km away
37. 1.74 km SE of Calpella, CAFri, Jul 14, 11:24 PM PDT · 17614 days ago · 5 km deep · 32 km away
38. 2.9Northern CaliforniaSat, Jul 15, 7:57 AM PDT · 17613 days ago · 0 km deep · 48 km away
39. 1.7Northern CaliforniaSun, Jul 16, 3:46 PM PDT · 17612 days ago · 1 km deep · 48 km away
40. 1.88 km WSW of Cobb, CaliforniaSun, Jul 16, 6:58 PM PDT · 17612 days ago · 3 km deep · 48 km away
41. 2.45 km WSW of Cobb, CaliforniaSun, Jul 16, 7:02 PM PDT · 17612 days ago · -1 km deep · 49 km away
42. 2.39 km E of Comptche, CaliforniaMon, Jul 17, 1:27 PM PDT · 17611 days ago · 8 km deep · 59 km away
43. 1.98 km ENE of Willits, CaliforniaTue, Jul 18, 6:47 PM PDT · 17610 days ago · 4 km deep · 45 km away
44. 2.00 km N of Kelseyville, CaliforniaThu, Jul 20, 2:23 AM PDT · 17608 days ago · 3 km deep · 29 km away
45. 1.68 km ENE of Willits, CaliforniaThu, Jul 20, 11:22 AM PDT · 17608 days ago · 4 km deep · 45 km away
46. 2.34 km WSW of Cobb, CaliforniaFri, Jul 21, 1:21 AM PDT · 17607 days ago · 1 km deep · 48 km away
47. 1.58 km WSW of Cobb, CaliforniaFri, Jul 21, 12:18 PM PDT · 17607 days ago · 1 km deep · 48 km away
48. 1.67 km W of Cobb, CaliforniaFri, Jul 21, 8:37 PM PDT · 17607 days ago · 0 km deep · 46 km away
49. 1.74 km WSW of Cobb, CaliforniaSun, Jul 23, 7:19 PM PDT · 17605 days ago · 3 km deep · 47 km away
50. 1.57 km W of Cobb, CaliforniaThu, Jul 27, 7:46 AM PDT · 17601 days ago · 4 km deep · 47 km away
51. 3.07 km NNW of Rancho Tehama Reserve, CaliforniaThu, Jul 27, 10:52 PM PDT · 17601 days ago · 18 km deep · 98 km away
52. 2.39 km WNW of Rancho Tehama Reserve, CaliforniaThu, Jul 27, 11:17 PM PDT · 17601 days ago · 22 km deep · 95 km away
53. 1.98 km WSW of Rancho Tehama Reserve, CaliforniaFri, Jul 28, 1:06 AM PDT · 17601 days ago · 11 km deep · 88 km away
54. 2.04 km WSW of Cobb, CaliforniaFri, Jul 28, 1:21 AM PDT · 17600 days ago · 2 km deep · 48 km away
55. 1.93 km SE of Willows, CaliforniaSat, Jul 29, 1:33 AM PDT · 17599 days ago · 20 km deep · 62 km away
56. 1.911 km SE of Boonville, CaliforniaSun, Jul 30, 8:46 PM PDT · 17598 days ago · 4 km deep · 55 km away
57. 1.77 km WSW of Cobb, CaliforniaTue, Aug 1, 1:08 AM PDT · 17597 days ago · 2 km deep · 49 km away
58. 2.26 km W of Cobb, CaliforniaThu, Aug 3, 5:25 AM PDT · 17594 days ago · 3 km deep · 46 km away
59. 1.710 km ENE of Clearlake Oaks, CaliforniaThu, Aug 3, 10:15 PM PDT · 17594 days ago · -1 km deep · 29 km away
60. 2.320 km WNW of Jenner, CaliforniaSun, Aug 6, 7:25 AM PDT · 17591 days ago · 0 km deep · 90 km away

Before

1. 1.65 km NE of Upper Lake, CaliforniaFri, Jun 9, 10:04 PM PDT · 17649 days ago · 8 km deep · 7 km away
2. 1.85 km E of Lower Lake, CaliforniaThu, Jun 8, 7:40 PM PDT · 17650 days ago · 4 km deep · 43 km away
3. 1.93 km E of Calpella, CaliforniaThu, Jun 8, 12:31 PM PDT · 17650 days ago · 6 km deep · 31 km away
4. 1.67 km W of Cobb, CaliforniaWed, Jun 7, 4:36 AM PDT · 17651 days ago · 3 km deep · 47 km away
5. 1.86 km ENE of Santa Rosa, CaliforniaTue, Jun 6, 6:39 PM PDT · 17652 days ago · 9 km deep · 88 km away
6. 1.77 km W of Cobb, CaliforniaTue, Jun 6, 6:23 PM PDT · 17652 days ago · 0 km deep · 47 km away
7. 1.53 km SE of Calpella, CaliforniaTue, Jun 6, 1:50 AM PDT · 17652 days ago · 6 km deep · 32 km away
8. 1.83 km E of Calpella, CaliforniaSun, Jun 4, 7:30 AM PDT · 17654 days ago · 6 km deep · 32 km away
9. 1.812 km S of Willows, CaliforniaSat, Jun 3, 5:42 PM PDT · 17655 days ago · 24 km deep · 56 km away
10. 2.216 km ENE of Potter Valley, CaliforniaThu, Jun 1, 11:19 PM PDT · 17657 days ago · 0 km deep · 17 km away
11. 2.69 km WNW of Healdsburg, CaliforniaThu, Jun 1, 9:54 AM PDT · 17657 days ago · 6 km deep · 69 km away
12. 1.75 km NE of Ukiah, CaliforniaWed, May 31, 8:39 PM PDT · 17658 days ago · 8 km deep · 32 km away
13. 1.52 km N of Deer Park, CaliforniaTue, May 30, 3:31 PM PDT · 17659 days ago · 13 km deep · 81 km away
14. 1.69 km SW of Hopland, CaliforniaTue, May 30, 2:08 PM PDT · 17659 days ago · -1 km deep · 50 km away
15. 2.3near the coast of Northern CaliforniaMon, May 29, 1:55 PM PDT · 17660 days ago · 6 km deep · 45 km away
16. 1.67 km WSW of Cobb, CaliforniaSat, May 27, 1:16 PM PDT · 17662 days ago · 2 km deep · 49 km away
17. 3.8Northern CaliforniaSat, May 27, 11:22 AM PDT · 17662 days ago · 7 km deep · 78 km away
18. 2.37 km WSW of Cobb, CaliforniaFri, May 26, 9:34 AM PDT · 17663 days ago · 4 km deep · 49 km away
19. 1.96 km NE of Princeton, CaliforniaThu, May 25, 3:58 PM PDT · 17664 days ago · 15 km deep · 75 km away
20. 3.013 km WNW of Laytonville, CaliforniaWed, May 24, 8:47 PM PDT · 17665 days ago · 1 km deep · 90 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1040636. Read Sun, Oct 4, 2026, 7:50 PM UTC.