M1.8 earthquake 5km ESE of St. Helena, CA

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Mon, Mar 1, 2021, 9:53 AM PST

UTC

2021-03-01 17:53:04 UTC

Depth

11.5 km (7.2 mi), shallow

Epicenter

38.482° N, 122.417° W

Region

California

Felt reports

1

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.13

Depth from

From location

Station coverage gap

123°

Stations used

50

• Saint Helena, CaliforniaPopulation 5,814. Forecast5 kmESE
• Agua Caliente, CaliforniaPopulation 27,090. Forecast19 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast26 kmE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast618 kmNW

After

1. 2.210km N of Cloverdale, CAMon, Mar 1, 11:14 AM PST · 2042 days ago · -1 km deep · 68 km away
2. 2.52km SE of The Geysers, CAMon, Mar 1, 2:26 PM PST · 2042 days ago · 1 km deep · 42 km away
3. 2.93km SE of The Geysers, CAMon, Mar 1, 2:26 PM PST · 2042 days ago · 1 km deep · 41 km away · felt by 7
4. 1.96km ESE of St. Helena, CATue, Mar 2, 4:47 PM PST · 2041 days ago · 7 km deep · 1 km away
5. 2.08km W of Cobb, CAWed, Mar 3, 5:37 PM PST · 2040 days ago · 2 km deep · 52 km away · felt by 1
6. 1.63km SSW of Cobb, CAThu, Mar 4, 1:10 AM PST · 2039 days ago · 2 km deep · 45 km away
7. 3.16km WSW of St. Helena, CAThu, Mar 4, 7:53 AM PST · 2039 days ago · 11 km deep · 10 km away · felt by 234
8. 1.75km NW of The Geysers, CAFri, Mar 5, 5:40 AM PST · 2038 days ago · 3 km deep · 49 km away
9. 1.93km ESE of Berkeley, CAFri, Mar 5, 2:57 PM PST · 2038 days ago · 7 km deep · 71 km away · felt by 5
10. 1.64km NNW of The Geysers, CAFri, Mar 5, 5:52 PM PST · 2038 days ago · 1 km deep · 48 km away · felt by 3
11. 2.74km NNW of The Geysers, CAFri, Mar 5, 5:52 PM PST · 2038 days ago · 1 km deep · 48 km away · felt by 2
12. 2.34km NW of The Geysers, CAFri, Mar 5, 5:53 PM PST · 2038 days ago · 2 km deep · 48 km away
13. 1.75km WNW of Angwin, CAFri, Mar 5, 6:07 PM PST · 2038 days ago · 4 km deep · 15 km away
14. 1.52km E of The Geysers, CASun, Mar 7, 12:08 AM PST · 2037 days ago · 1 km deep · 42 km away
15. 1.66km NW of The Geysers, CASun, Mar 7, 5:07 PM PST · 2036 days ago · 3 km deep · 51 km away
16. 1.53km W of Cobb, CAMon, Mar 8, 6:23 AM PST · 2035 days ago · 2 km deep · 48 km away
17. 2.06km NW of The Geysers, CAWed, Mar 10, 12:25 AM PST · 2033 days ago · 3 km deep · 50 km away
18. 1.72km NW of The Geysers, CAWed, Mar 10, 4:45 AM PST · 2033 days ago · 2 km deep · 46 km away
19. 1.76km NW of The Geysers, CAWed, Mar 10, 5:40 AM PST · 2033 days ago · 3 km deep · 50 km away
20. 1.65km WNW of Cobb, CAWed, Mar 10, 3:45 PM PST · 2033 days ago · 2 km deep · 50 km away
21. 2.13km W of Cobb, CAThu, Mar 11, 9:40 PM PST · 2032 days ago · 2 km deep · 48 km away
22. 1.86km NW of The Geysers, CAFri, Mar 12, 5:16 AM PST · 2031 days ago · 3 km deep · 50 km away
23. 2.018km NE of Upper Lake, CAFri, Mar 12, 9:56 AM PST · 2031 days ago · 2 km deep · 93 km away
24. 1.818km SE of Lake Pillsbury, CAFri, Mar 12, 3:12 PM PST · 2031 days ago · 7 km deep · 97 km away
25. 1.88km NW of The Geysers, CASat, Mar 13, 5:17 AM PST · 2030 days ago · 2 km deep · 52 km away
26. 1.76km SSW of Yountville, CASun, Mar 14, 10:55 AM PDT · 2029 days ago · 7 km deep · 15 km away · felt by 1
27. 1.62km E of Vallejo, CASun, Mar 14, 11:24 AM PDT · 2029 days ago · 7 km deep · 45 km away
28. 2.710km WNW of American Canyon, CAThu, Mar 18, 7:01 AM PDT · 2025 days ago · 9 km deep · 30 km away · felt by 20
29. 1.613km NW of The Geysers, CAThu, Mar 18, 12:33 PM PDT · 2025 days ago · 3 km deep · 57 km away
30. 2.27km NW of The Geysers, CAThu, Mar 18, 4:17 PM PDT · 2025 days ago · 3 km deep · 51 km away
31. 1.911km N of Healdsburg, CAFri, Mar 19, 2:33 PM PDT · 2024 days ago · 6 km deep · 46 km away
32. 1.89km WNW of The Geysers, CASat, Mar 20, 12:20 AM PDT · 2024 days ago · 2 km deep · 53 km away
33. 1.81km NNE of The Geysers, CASun, Mar 21, 2:58 AM PDT · 2022 days ago · 2 km deep · 44 km away
34. 1.95km NW of The Geysers, CASun, Mar 21, 5:55 AM PDT · 2022 days ago · 3 km deep · 49 km away
35. 1.65km S of Yountville, CASun, Mar 21, 8:17 AM PDT · 2022 days ago · 5 km deep · 15 km away
36. 1.97km W of Cobb, CASun, Mar 21, 7:27 PM PDT · 2022 days ago · 3 km deep · 52 km away
37. 2.73km SSW of Anderson Springs, CAMon, Mar 22, 3:39 PM PDT · 2021 days ago · 2 km deep · 39 km away · felt by 1
38. 1.63km ENE of The Geysers, CAMon, Mar 22, 6:15 PM PDT · 2021 days ago · 1 km deep · 43 km away
39. 2.39km WNW of The Geysers, CATue, Mar 23, 8:31 AM PDT · 2020 days ago · 2 km deep · 53 km away
40. 2.24km W of Cobb, CATue, Mar 23, 10:06 AM PDT · 2020 days ago · 2 km deep · 49 km away
41. 2.24km W of Cobb, CATue, Mar 23, 10:14 AM PDT · 2020 days ago · 2 km deep · 49 km away
42. 2.24km SSW of Anderson Springs, CATue, Mar 23, 1:59 PM PDT · 2020 days ago · 2 km deep · 39 km away
43. 1.84km SSW of Anderson Springs, CATue, Mar 23, 2:06 PM PDT · 2020 days ago · 1 km deep · 39 km away
44. 2.810km ENE of Yountville, CATue, Mar 23, 2:15 PM PDT · 2020 days ago · 11 km deep · 15 km away · felt by 42
45. 1.811km ENE of Yountville, CATue, Mar 23, 3:43 PM PDT · 2020 days ago · 7 km deep · 17 km away · felt by 1
46. 1.75km NW of The Geysers, CATue, Mar 23, 9:51 PM PDT · 2020 days ago · 1 km deep · 49 km away
47. 1.86km WNW of The Geysers, CATue, Mar 23, 11:01 PM PDT · 2020 days ago · 3 km deep · 49 km away
48. 2.27km SW of Arbuckle, CAWed, Mar 24, 5:59 AM PDT · 2019 days ago · 15 km deep · 61 km away · felt by 1
49. 1.94km SW of Anderson Springs, CAWed, Mar 24, 2:51 PM PDT · 2019 days ago · 2 km deep · 39 km away
50. 2.26km WNW of Cobb, CAFri, Mar 26, 12:21 AM PDT · 2018 days ago · 2 km deep · 51 km away
51. 1.76km WNW of Cobb, CAFri, Mar 26, 12:33 AM PDT · 2018 days ago · 2 km deep · 51 km away
52. 1.54km WNW of The Geysers, CAFri, Mar 26, 11:13 AM PDT · 2017 days ago · 0 km deep · 48 km away
53. 1.96km NW of The Geysers, CAFri, Mar 26, 1:40 PM PDT · 2017 days ago · 3 km deep · 50 km away
54. 2.813km SE of Talmage, CAFri, Mar 26, 3:12 PM PDT · 2017 days ago · 2 km deep · 84 km away · felt by 4
55. 2.813km SE of Talmage, CAFri, Mar 26, 3:14 PM PDT · 2017 days ago · -1 km deep · 84 km away · felt by 17
56. 2.04km SSW of Anderson Springs, CASat, Mar 27, 2:00 AM PDT · 2016 days ago · 1 km deep · 39 km away
57. 1.913km SE of Talmage, CASat, Mar 27, 7:53 AM PDT · 2016 days ago · 2 km deep · 84 km away
58. 2.04km NW of The Geysers, CAMon, Mar 29, 3:38 PM PDT · 2014 days ago · 1 km deep · 48 km away · felt by 1
59. 3.15km W of Cobb, CATue, Mar 30, 10:05 AM PDT · 2013 days ago · 1 km deep · 50 km away · felt by 12
60. 1.93km NNW of The Geysers, CATue, Mar 30, 10:07 AM PDT · 2013 days ago · 0 km deep · 47 km away

The first 60 of 169.

Before

1. 1.65km WNW of Cobb, CAMon, Mar 1, 9:30 AM PST · 2042 days ago · 2 km deep · 50 km away
2. 2.35km WNW of Cobb, CAMon, Mar 1, 9:10 AM PST · 2042 days ago · 2 km deep · 51 km away · felt by 6
3. 2.11km ENE of The Geysers, CASun, Feb 28, 4:31 PM PST · 2043 days ago · -1 km deep · 44 km away
4. 2.01km ENE of The Geysers, CASun, Feb 28, 4:30 PM PST · 2043 days ago · 0 km deep · 44 km away
5. 1.81km NE of The Geysers, CASun, Feb 28, 4:30 PM PST · 2043 days ago · -1 km deep · 44 km away
6. 2.61km NW of The Geysers, CASat, Feb 27, 8:43 PM PST · 2044 days ago · 2 km deep · 46 km away · felt by 5
7. 1.88km NW of The Geysers, CASat, Feb 27, 1:15 AM PST · 2044 days ago · 2 km deep · 52 km away
8. 2.213km WNW of Calistoga, CAFri, Feb 26, 3:13 PM PST · 2045 days ago · 6 km deep · 30 km away · felt by 1
9. 1.65km NW of The Geysers, CAFri, Feb 26, 12:26 PM PST · 2045 days ago · 3 km deep · 49 km away
10. 1.66km ESE of Fairview, CAThu, Feb 25, 11:37 PM PST · 2046 days ago · 10 km deep · 98 km away
11. 1.67km NW of The Geysers, CAThu, Feb 25, 7:42 PM PST · 2046 days ago · 2 km deep · 51 km away
12. 2.36km WNW of The Geysers, CAThu, Feb 25, 11:39 AM PST · 2046 days ago · 3 km deep · 50 km away
13. 2.27km WNW of The Geysers, CAThu, Feb 25, 11:32 AM PST · 2046 days ago · 2 km deep · 51 km away
14. 3.87km NW of The Geysers, CAThu, Feb 25, 11:30 AM PST · 2046 days ago · 3 km deep · 51 km away · felt by 46
15. 1.52km NW of The Geysers, CAWed, Feb 24, 10:49 AM PST · 2047 days ago · 1 km deep · 46 km away
16. 1.63km WSW of Blackhawk, CAWed, Feb 24, 9:02 AM PST · 2047 days ago · 7 km deep · 86 km away
17. 1.94km NW of The Geysers, CAWed, Feb 24, 6:47 AM PST · 2047 days ago · 0 km deep · 48 km away
18. 2.14km NW of The Geysers, CAWed, Feb 24, 6:46 AM PST · 2047 days ago · 0 km deep · 48 km away
19. 2.113km E of Angwin, CAWed, Feb 24, 3:12 AM PST · 2047 days ago · 8 km deep · 14 km away · felt by 1
20. 2.013km E of Angwin, CAWed, Feb 24, 3:07 AM PST · 2047 days ago · 7 km deep · 14 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73529871. Read Sat, Oct 3, 2026, 7:43 PM UTC.