M2.1 earthquake 8km W of Cobb, CA

Magnitude

2.1 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sat, Dec 18, 2021, 8:19 AM PST

UTC

2021-12-18 16:19:56 UTC

Depth

2.5 km (1.6 mi), shallow

Epicenter

38.833° N, 122.811° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.2 km in depth

Magnitude uncertainty

±0.14

Depth from

From location

Station coverage gap

39°

Stations used

59

• Cobb, CaliforniaPopulation 1,778. Forecast8 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast21 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast44 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast670 kmNW

After

1. 1.61km NW of The Geysers, CASat, Dec 18, 8:37 AM PST · 1750 days ago · 2 km deep · 7 km away
2. 2.210km ESE of Willits, CASat, Dec 18, 12:02 PM PST · 1750 days ago · 7 km deep · 71 km away · felt by 1
3. 1.88km NW of The Geysers, CATue, Dec 21, 12:52 AM PST · 1748 days ago · 2 km deep · 1 km away
4. 1.51km NNW of The Geysers, CATue, Dec 21, 1:41 AM PST · 1748 days ago · 1 km deep · 7 km away
5. 1.59km S of Boonville, CATue, Dec 21, 1:46 PM PST · 1747 days ago · 0 km deep · 50 km away · felt by 1
6. 2.14km E of Redwood Valley, CAWed, Dec 22, 11:04 AM PST · 1746 days ago · 3 km deep · 57 km away · felt by 1
7. 1.74km E of Redwood Valley, CAWed, Dec 22, 11:08 AM PST · 1746 days ago · 4 km deep · 57 km away
8. 1.720km ESE of Navarro Head, CAWed, Dec 22, 12:41 PM PST · 1746 days ago · 3 km deep · 73 km away
9. 1.61km NW of The Geysers, CAWed, Dec 22, 3:54 PM PST · 1746 days ago · 2 km deep · 6 km away
10. 1.71km N of The Geysers, CAWed, Dec 22, 4:08 PM PST · 1746 days ago · 3 km deep · 7 km away
11. 2.513km SE of Talmage, CAWed, Dec 22, 4:24 PM PST · 1746 days ago · 3 km deep · 33 km away · felt by 8
12. 1.86km NNW of The Geysers, CAThu, Dec 23, 8:40 AM PST · 1745 days ago · 1 km deep · 2 km away
13. 2.55km NNW of The Geysers, CAThu, Dec 23, 9:50 AM PST · 1745 days ago · 1 km deep · 2 km away
14. 1.54km SE of Clearlake Oaks, CAThu, Dec 23, 6:50 PM PST · 1745 days ago · 5 km deep · 24 km away
15. 1.89km NNW of Redwood Valley, CAThu, Dec 23, 7:01 PM PST · 1745 days ago · 7 km deep · 68 km away
16. 1.64km WNW of The Geysers, CAThu, Dec 23, 8:18 PM PST · 1745 days ago · 3 km deep · 5 km away
17. 2.010km NNW of Redwood Valley, CAThu, Dec 23, 10:12 PM PST · 1745 days ago · 7 km deep · 68 km away · felt by 1
18. 1.67km NE of Willits, CAThu, Dec 23, 10:23 PM PST · 1745 days ago · 7 km deep · 80 km away
19. 2.19km NNW of Lake Pillsbury, CAThu, Dec 23, 11:27 PM PST · 1745 days ago · 7 km deep · 75 km away
20. 2.23km SW of Anderson Springs, CASat, Dec 25, 2:25 AM PST · 1744 days ago · 1 km deep · 13 km away
21. 1.56km WNW of Cobb, CASat, Dec 25, 9:06 AM PST · 1743 days ago · 2 km deep · 2 km away
22. 2.46km WNW of North Lakeport, CAMon, Dec 27, 6:48 AM PST · 1741 days ago · 5 km deep · 34 km away · felt by 2
23. 1.512km WNW of Cobb, CAMon, Dec 27, 9:19 AM PST · 1741 days ago · 1 km deep · 5 km away
24. 1.55km NW of The Geysers, CAMon, Dec 27, 10:55 AM PST · 1741 days ago · 4 km deep · 3 km away
25. 1.73km NNE of The Geysers, CAMon, Dec 27, 10:44 PM PST · 1741 days ago · 1 km deep · 7 km away
26. 2.23km NW of The Geysers, CATue, Dec 28, 12:29 AM PST · 1741 days ago · 1 km deep · 4 km away
27. 1.63km SSE of The Geysers, CATue, Dec 28, 11:53 AM PST · 1740 days ago · 1 km deep · 11 km away
28. 1.52km W of Anderson Springs, CAWed, Dec 29, 4:49 AM PST · 1740 days ago · 2 km deep · 11 km away
29. 2.57km NW of Cobb, CAWed, Dec 29, 7:46 AM PST · 1739 days ago · 3 km deep · 4 km away · felt by 4
30. 1.75km NE of Larkfield-Wikiup, CAWed, Dec 29, 5:11 PM PST · 1739 days ago · 8 km deep · 32 km away
31. 1.713km SE of Laytonville, CAThu, Dec 30, 2:17 AM PST · 1739 days ago · 7 km deep · 98 km away
32. 2.410km WNW of The Geysers, CAThu, Dec 30, 11:55 AM PST · 1738 days ago · 2 km deep · 3 km away
33. 1.56km W of Kenwood, CAThu, Dec 30, 11:05 PM PST · 1738 days ago · 6 km deep · 50 km away
34. 1.66km NW of The Geysers, CAFri, Dec 31, 3:15 AM PST · 1738 days ago · 3 km deep · 1 km away
35. 1.86km NW of The Geysers, CAFri, Dec 31, 8:03 PM PST · 1737 days ago · 3 km deep · 2 km away
36. 2.72km E of The Geysers, CASat, Jan 1, 12:33 AM PST · 1737 days ago · 2 km deep · 10 km away · felt by 6
37. 1.65km NE of Larkfield-Wikiup, CASat, Jan 1, 2:09 AM PST · 1737 days ago · 6 km deep · 33 km away
38. 2.01km NNW of The Geysers, CASat, Jan 1, 5:53 AM PST · 1737 days ago · 2 km deep · 7 km away
39. 1.918km SE of Lake Pillsbury, CASat, Jan 1, 3:26 PM PST · 1736 days ago · 5 km deep · 53 km away
40. 1.81km WNW of The Geysers, CASat, Jan 1, 7:19 PM PST · 1736 days ago · 1 km deep · 7 km away · felt by 2
41. 1.86km SE of Lake Pillsbury, CASun, Jan 2, 3:09 AM PST · 1736 days ago · 4 km deep · 60 km away
42. 1.57km ENE of Brooktrails, CASun, Jan 2, 11:45 AM PST · 1735 days ago · 7 km deep · 84 km away
43. 1.89km WNW of The Geysers, CAMon, Jan 3, 11:07 PM PST · 1734 days ago · 2 km deep · 3 km away · felt by 3
44. 2.39km WNW of The Geysers, CAMon, Jan 3, 11:07 PM PST · 1734 days ago · 2 km deep · 3 km away
45. 1.61km ESE of The Geysers, CATue, Jan 4, 6:04 AM PST · 1734 days ago · 2 km deep · 9 km away
46. 1.88km WNW of Cobb, CATue, Jan 4, 7:23 AM PST · 1733 days ago · 1 km deep · 1 km away
47. 2.13km SE of The Geysers, CATue, Jan 4, 2:37 PM PST · 1733 days ago · 2 km deep · 11 km away
48. 2.16km ENE of Kenwood, CAWed, Jan 5, 7:57 AM PST · 1732 days ago · 9 km deep · 52 km away
49. 1.78km NW of The Geysers, CAThu, Jan 6, 5:03 AM PST · 1732 days ago · 2 km deep · 1 km away · felt by 1
50. 1.72km WNW of Anderson Springs, CAThu, Jan 6, 9:37 AM PST · 1731 days ago · 2 km deep · 10 km away
51. 2.37km W of Cobb, CAThu, Jan 6, 3:11 PM PST · 1731 days ago · 3 km deep · 0 km away · felt by 1
52. 2.14km WNW of The Geysers, CAThu, Jan 6, 3:39 PM PST · 1731 days ago · 3 km deep · 5 km away
53. 1.78km NW of The Geysers, CAThu, Jan 6, 6:43 PM PST · 1731 days ago · 2 km deep · 0 km away
54. 1.65km NW of The Geysers, CAFri, Jan 7, 2:45 AM PST · 1731 days ago · 2 km deep · 3 km away
55. 2.414km WNW of Alder Springs, CAFri, Jan 7, 4:37 AM PST · 1731 days ago · 7 km deep · 96 km away
56. 2.013km WNW of Alder Springs, CAFri, Jan 7, 6:08 AM PST · 1731 days ago · 3 km deep · 95 km away
57. 2.33km SW of Anderson Springs, CAFri, Jan 7, 8:31 AM PST · 1730 days ago · 2 km deep · 12 km away
58. 2.05km W of Yountville, CAFri, Jan 7, 10:42 AM PST · 1730 days ago · 6 km deep · 59 km away
59. 2.814km WNW of Alder Springs, CAFri, Jan 7, 12:34 PM PST · 1730 days ago · 7 km deep · 95 km away · felt by 2
60. 2.67km W of Cobb, CASat, Jan 8, 12:29 AM PST · 1730 days ago · 1 km deep · 0 km away · felt by 5

The first 60 of 157.

Before

1. 1.66km ESE of Redwood Valley, CASat, Dec 18, 5:48 AM PST · 1751 days ago · 2 km deep · 54 km away
2. 1.57km W of Cobb, CASat, Dec 18, 2:09 AM PST · 1751 days ago · 1 km deep · 1 km away
3. 2.00km NE of The Geysers, CAFri, Dec 17, 9:46 PM PST · 1751 days ago · 1 km deep · 8 km away
4. 2.05km W of Cobb, CAFri, Dec 17, 3:31 PM PST · 1751 days ago · 2 km deep · 2 km away
5. 1.516km E of Mendocino, CAThu, Dec 16, 4:34 PM PST · 1752 days ago · 8 km deep · 89 km away
6. 1.73km W of Anderson Springs, CAWed, Dec 15, 6:19 AM PST · 1754 days ago · 1 km deep · 10 km away
7. 2.020km ESE of Navarro Head, CATue, Dec 14, 6:39 PM PST · 1754 days ago · 3 km deep · 72 km away
8. 1.63km E of The Geysers, CATue, Dec 14, 5:13 PM PST · 1754 days ago · 1 km deep · 10 km away
9. 2.68km WNW of Cobb, CATue, Dec 14, 4:35 PM PST · 1754 days ago · 2 km deep · 0 km away · felt by 2
10. 1.87km WNW of Cobb, CATue, Dec 14, 3:29 PM PST · 1754 days ago · 2 km deep · 1 km away
11. 1.55km NW of The Geysers, CATue, Dec 14, 9:41 AM PST · 1754 days ago · 3 km deep · 3 km away
12. 1.55km NNE of Clearlake, CATue, Dec 14, 7:36 AM PST · 1754 days ago · 5 km deep · 26 km away
13. 1.71km NE of The Geysers, CAMon, Dec 13, 11:51 AM PST · 1755 days ago · 2 km deep · 8 km away
14. 1.97km WSW of The Geysers, CAMon, Dec 13, 10:20 AM PST · 1755 days ago · 4 km deep · 10 km away
15. 1.67km WSW of Lagunitas-Forest Knolls, CAMon, Dec 13, 6:35 AM PST · 1755 days ago · 5 km deep · 94 km away
16. 1.510km NW of The Geysers, CAMon, Dec 13, 12:46 AM PST · 1756 days ago · 2 km deep · 3 km away
17. 1.74km W of Cobb, CASun, Dec 12, 10:23 PM PST · 1756 days ago · 2 km deep · 4 km away
18. 1.63km NW of The Geysers, CASun, Dec 12, 11:38 AM PST · 1756 days ago · 1 km deep · 4 km away
19. 1.67km W of Cobb, CASat, Dec 11, 8:09 AM PST · 1757 days ago · 2 km deep · 0 km away
20. 1.97km W of Cobb, CASat, Dec 11, 8:01 AM PST · 1757 days ago · 2 km deep · 0 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73665316. Read Sun, Oct 4, 2026, 1:50 AM UTC.