M1.6 earthquake 3km NNW of Angwin, CA

Magnitude

1.6 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sun, Apr 18, 2021, 9:47 AM PDT

UTC

2021-04-18 16:47:52 UTC

Depth

0.4 km (0.2 mi), shallow

Epicenter

38.603° N, 122.466° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.21

Depth from

From location

Station coverage gap

70°

Stations used

52

• Angwin, CaliforniaPopulation 3,051. Forecast3 kmNNW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast28 kmNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast632 kmNW

After

1. 2.87km NW of The Geysers, CASun, Apr 18, 7:21 PM PDT · 1995 days ago · 2 km deep · 39 km away · felt by 5
2. 1.79km WNW of Cobb, CASun, Apr 18, 10:43 PM PDT · 1994 days ago · 2 km deep · 41 km away
3. 2.04km WNW of Cobb, CAMon, Apr 19, 2:33 AM PDT · 1994 days ago · 2 km deep · 36 km away · felt by 1
4. 4.03km SW of Anderson Springs, CAMon, Apr 19, 11:50 AM PDT · 1994 days ago · 3 km deep · 28 km away · felt by 780
5. 2.33km WSW of Anderson Springs, CAMon, Apr 19, 11:51 AM PDT · 1994 days ago · 1 km deep · 29 km away
6. 1.73km SE of The Geysers, CAMon, Apr 19, 11:52 AM PDT · 1994 days ago · 1 km deep · 29 km away
7. 1.63km S of Anderson Springs, CAMon, Apr 19, 11:54 AM PDT · 1994 days ago · 1 km deep · 26 km away
8. 1.621km ENE of Hidden Valley Lake, CAMon, Apr 19, 2:38 PM PDT · 1994 days ago · 19 km deep · 32 km away
9. 1.816km SE of Lake Pillsbury, CAMon, Apr 19, 8:18 PM PDT · 1993 days ago · 5 km deep · 85 km away
10. 1.66km SSW of Calistoga, CATue, Apr 20, 7:42 AM PDT · 1993 days ago · 6 km deep · 15 km away
11. 1.87km W of Cobb, CATue, Apr 20, 11:41 AM PDT · 1993 days ago · 2 km deep · 39 km away
12. 1.69km W of North Lakeport, CATue, Apr 20, 12:59 PM PDT · 1993 days ago · 0 km deep · 72 km away
13. 2.37km W of Cobb, CATue, Apr 20, 2:40 PM PDT · 1993 days ago · 2 km deep · 39 km away
14. 1.87km NW of The Geysers, CATue, Apr 20, 4:29 PM PDT · 1993 days ago · 2 km deep · 39 km away
15. 1.83km SSE of The Geysers, CATue, Apr 20, 7:10 PM PDT · 1993 days ago · 1 km deep · 29 km away
16. 1.69km WSW of Cloverdale, CAWed, Apr 21, 4:30 AM PDT · 1992 days ago · 7 km deep · 59 km away
17. 1.83km S of Concord, CAWed, Apr 21, 8:38 PM PDT · 1991 days ago · 10 km deep · 83 km away
18. 1.910km SSE of Elmira, CAWed, Apr 21, 11:39 PM PDT · 1991 days ago · 23 km deep · 64 km away
19. 2.16km NW of The Geysers, CAThu, Apr 22, 12:04 AM PDT · 1991 days ago · 1 km deep · 38 km away
20. 2.56km NW of The Geysers, CAThu, Apr 22, 12:05 AM PDT · 1991 days ago · 1 km deep · 38 km away · felt by 2
21. 2.42km NE of Anderson Springs, CAThu, Apr 22, 1:00 AM PDT · 1991 days ago · 1 km deep · 27 km away
22. 1.66km WNW of Cobb, CAThu, Apr 22, 12:33 PM PDT · 1991 days ago · 2 km deep · 38 km away
23. 1.64km W of Kenwood, CAThu, Apr 22, 12:49 PM PDT · 1991 days ago · 7 km deep · 24 km away
24. 2.81km W of Anderson Springs, CAThu, Apr 22, 5:08 PM PDT · 1991 days ago · 3 km deep · 28 km away · felt by 6
25. 1.87km NW of The Geysers, CAFri, Apr 23, 5:44 AM PDT · 1990 days ago · 1 km deep · 39 km away
26. 1.56km WNW of The Geysers, CAFri, Apr 23, 9:26 AM PDT · 1990 days ago · 3 km deep · 38 km away
27. 1.86km NNW of The Geysers, CAFri, Apr 23, 10:11 AM PDT · 1990 days ago · 3 km deep · 38 km away
28. 2.63km WSW of Anderson Springs, CAFri, Apr 23, 9:21 PM PDT · 1989 days ago · 2 km deep · 29 km away
29. 1.61km W of Lake Pillsbury, CASat, Apr 24, 1:52 PM PDT · 1989 days ago · 2 km deep · 100 km away
30. 1.78km NW of The Geysers, CASat, Apr 24, 5:15 PM PDT · 1989 days ago · 2 km deep · 40 km away
31. 1.83km WSW of Oakley, CASat, Apr 24, 9:57 PM PDT · 1988 days ago · 17 km deep · 93 km away
32. 1.812km W of Lakeport, CASat, Apr 24, 10:55 PM PDT · 1988 days ago · 4 km deep · 69 km away
33. 2.31km NNW of The Geysers, CASun, Apr 25, 1:26 AM PDT · 1988 days ago · 3 km deep · 33 km away · felt by 1
34. 1.76km NW of The Geysers, CASun, Apr 25, 10:00 AM PDT · 1988 days ago · 3 km deep · 38 km away
35. 3.12km SSW of Anderson Springs, CASun, Apr 25, 9:05 PM PDT · 1987 days ago · 0 km deep · 26 km away · felt by 18
36. 1.66km NW of The Geysers, CAMon, Apr 26, 4:12 AM PDT · 1987 days ago · 3 km deep · 38 km away
37. 2.52km N of Piedmont, CAMon, Apr 26, 4:44 AM PDT · 1987 days ago · 6 km deep · 87 km away · felt by 1,284
38. 2.05km NNW of The Geysers, CATue, Apr 27, 7:04 AM PDT · 1986 days ago · 2 km deep · 36 km away
39. 1.54km SW of Glen Ellen, CATue, Apr 27, 11:18 PM PDT · 1985 days ago · 5 km deep · 31 km away
40. 2.82km N of Piedmont, CAWed, Apr 28, 12:18 AM PDT · 1985 days ago · 6 km deep · 87 km away · felt by 2,614
41. 1.87km WNW of The Geysers, CAWed, Apr 28, 3:08 AM PDT · 1985 days ago · 3 km deep · 39 km away
42. 1.510km ENE of Clearlake, CAWed, Apr 28, 7:17 AM PDT · 1985 days ago · 3 km deep · 43 km away
43. 1.68km SE of Cloverdale, CAWed, Apr 28, 9:08 AM PDT · 1985 days ago · 6 km deep · 45 km away
44. 1.810km WNW of The Geysers, CAWed, Apr 28, 1:19 PM PDT · 1985 days ago · 3 km deep · 41 km away
45. 2.16km W of Yountville, CAThu, Apr 29, 2:36 AM PDT · 1984 days ago · 5 km deep · 22 km away
46. 2.74km NW of The Geysers, CAThu, Apr 29, 7:08 AM PDT · 1984 days ago · 3 km deep · 36 km away · felt by 1
47. 1.66km NW of The Geysers, CAThu, Apr 29, 9:15 PM PDT · 1983 days ago · 3 km deep · 38 km away
48. 1.65km NW of The Geysers, CAFri, Apr 30, 6:07 AM PDT · 1983 days ago · 3 km deep · 37 km away
49. 2.85km NW of The Geysers, CAFri, Apr 30, 7:59 AM PDT · 1983 days ago · 4 km deep · 37 km away · felt by 3
50. 1.62km ESE of The Geysers, CAFri, Apr 30, 11:00 PM PDT · 1982 days ago · 1 km deep · 30 km away
51. 1.63km WNW of Lower Lake, CASat, May 1, 11:39 AM PDT · 1982 days ago · 4 km deep · 39 km away
52. 1.71km NW of The Geysers, CASat, May 1, 5:22 PM PDT · 1982 days ago · 2 km deep · 33 km away
53. 2.11km WNW of Danville, CASun, May 2, 1:51 PM PDT · 1981 days ago · 7 km deep · 95 km away · felt by 3
54. 2.110km NW of The Geysers, CASun, May 2, 6:38 PM PDT · 1981 days ago · 2 km deep · 42 km away
55. 2.17km NW of The Geysers, CASun, May 2, 11:35 PM PDT · 1980 days ago · 2 km deep · 39 km away
56. 1.86km WNW of Cobb, CAMon, May 3, 1:28 AM PDT · 1980 days ago · 2 km deep · 38 km away · felt by 1
57. 1.62km NE of The Geysers, CAMon, May 3, 3:08 AM PDT · 1980 days ago · 1 km deep · 31 km away
58. 1.93km SW of Anderson Springs, CAMon, May 3, 7:42 AM PDT · 1980 days ago · 2 km deep · 27 km away
59. 1.78km W of Cobb, CAMon, May 3, 10:51 AM PDT · 1980 days ago · 2 km deep · 39 km away
60. 2.04km WNW of The Geysers, CATue, May 4, 6:55 AM PDT · 1979 days ago · 0 km deep · 36 km away

The first 60 of 196.

Before

1. 1.56km E of Redwood Valley, CASun, Apr 18, 3:25 AM PDT · 1995 days ago · 6 km deep · 93 km away
2. 1.97km NW of The Geysers, CASun, Apr 18, 1:41 AM PDT · 1995 days ago · 2 km deep · 39 km away · felt by 1
3. 1.64km W of Cobb, CASun, Apr 18, 1:40 AM PDT · 1995 days ago · 2 km deep · 35 km away
4. 1.66km SSW of Calistoga, CASat, Apr 17, 5:44 PM PDT · 1996 days ago · 9 km deep · 14 km away
5. 1.77km W of Cobb, CASat, Apr 17, 1:42 PM PDT · 1996 days ago · 2 km deep · 39 km away
6. 2.37km W of Cobb, CAFri, Apr 16, 9:54 PM PDT · 1996 days ago · 2 km deep · 38 km away
7. 1.98km NW of The Geysers, CAFri, Apr 16, 9:02 PM PDT · 1996 days ago · 2 km deep · 40 km away
8. 1.610km WNW of The Geysers, CAFri, Apr 16, 6:04 PM PDT · 1997 days ago · 3 km deep · 41 km away
9. 1.610km WNW of The Geysers, CAFri, Apr 16, 6:02 PM PDT · 1997 days ago · 3 km deep · 41 km away
10. 2.020km SW of Arbuckle, CAFri, Apr 16, 5:16 PM PDT · 1997 days ago · 12 km deep · 39 km away
11. 2.03km W of Anderson Springs, CAFri, Apr 16, 2:36 AM PDT · 1997 days ago · 2 km deep · 30 km away
12. 2.72km W of Anderson Springs, CAFri, Apr 16, 2:35 AM PDT · 1997 days ago · 2 km deep · 29 km away · felt by 7
13. 1.62km NW of The Geysers, CAThu, Apr 15, 11:31 PM PDT · 1997 days ago · 2 km deep · 33 km away
14. 1.62km N of The Geysers, CAThu, Apr 15, 8:39 PM PDT · 1997 days ago · 1 km deep · 33 km away
15. 1.63km NW of The Geysers, CAThu, Apr 15, 8:24 PM PDT · 1997 days ago · 1 km deep · 35 km away
16. 1.76km NNW of The Geysers, CAThu, Apr 15, 8:15 PM PDT · 1997 days ago · 3 km deep · 38 km away
17. 1.69km ENE of Clearlake, CAThu, Apr 15, 5:02 PM PDT · 1998 days ago · -1 km deep · 42 km away
18. 1.93km SW of Cobb, CAThu, Apr 15, 2:50 PM PDT · 1998 days ago · 1 km deep · 33 km away
19. 2.58km NW of The Geysers, CAThu, Apr 15, 6:39 AM PDT · 1998 days ago · 2 km deep · 39 km away · felt by 3
20. 2.06km NNW of The Geysers, CAWed, Apr 14, 9:34 PM PDT · 1998 days ago · 3 km deep · 37 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73551040. Read Sun, Oct 4, 2026, 2:09 PM UTC.