California earthquakes

M1.7 earthquake 12 km ESE of Angwin, California

A magnitude 1.7 earthquake struck 12 km ESE of Angwin, California on Sun, Oct 30, 1977, 4:49 AM PST (12:49 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M1.8 8 km S of Calistoga, California. This one was a foreshock.

Angwin forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
1.7 (md), micro
Local time
UTC
1977-10-30 12:49:58 UTC
Depth
9.4 km (5.8 mi), shallow
Epicenter
38.544° N, 122.312° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.4 km horizontally, 1.8 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
87°
Stations used
21

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 97 in the 60 days after this one and 32 in the 30 days before it.

After

  1. 1.88 km S of Calistoga, California · 17859 days ago · 6 km deep · 24 km away
  2. 3.58 km S of Green Valley, California · 17858 days ago · 0 km deep · 43 km away
  3. 1.811 km NE of Healdsburg, California · 17858 days ago · 5 km deep · 42 km away
  4. 3.15 km WNW of Broadmoor, California · 17858 days ago · 5 km deep · 95 km away
  5. 2.96 km WNW of Broadmoor, California · 17858 days ago · 5 km deep · 95 km away
  6. 2.01 km E of Larkfield-Wikiup, California · 17857 days ago · 4 km deep · 37 km away
  7. 2.01 km ESE of Larkfield-Wikiup, California · 17857 days ago · 4 km deep · 37 km away
  8. 1.52 km SE of Rocklin, California · 17856 days ago · 13 km deep · 98 km away
  9. 1.611 km NE of Healdsburg, California · 17855 days ago · 5 km deep · 42 km away
  10. 2.36 km W of Cobb, California · 17855 days ago · -1 km deep · 52 km away
  11. 2.03 km WNW of Emeryville, California · 17852 days ago · 12 km deep · 78 km away
  12. 2.611 km NE of Healdsburg, California · 17852 days ago · 5 km deep · 42 km away
  13. 2.411 km NE of Healdsburg, California · 17852 days ago · 5 km deep · 43 km away
  14. 2.511 km NE of Healdsburg, California · 17852 days ago · 5 km deep · 43 km away
  15. 1.711 km NE of Healdsburg, California · 17851 days ago · 5 km deep · 42 km away
  16. 2.111 km NE of Healdsburg, California · 17851 days ago · 3 km deep · 42 km away
  17. 2.411 km NE of Healdsburg, California · 17851 days ago · 4 km deep · 42 km away
  18. 2.46 km WSW of Cobb, California · 17851 days ago · 0 km deep · 51 km away
  19. 3.19 km SSW of Willows, California · 17850 days ago · 19 km deep · 100 km away
  20. 1.66 km W of Cobb, California · 17849 days ago · 3 km deep · 52 km away
  21. 3.019 km WSW of Stonyford, California · 17849 days ago · 15 km deep · 90 km away
  22. 1.610 km ENE of Healdsburg, California · 17847 days ago · 6 km deep · 41 km away
  23. 2.27 km W of Cobb, California · 17847 days ago · 3 km deep · 53 km away
  24. 2.57 km W of Cobb, California · 17847 days ago · 3 km deep · 53 km away
  25. 2.07 km WSW of Cobb, California · 17847 days ago · 0 km deep · 51 km away
  26. 1.68 km W of Cobb, California · 17846 days ago · 1 km deep · 53 km away
  27. 1.51 km NE of Diablo, California · 17845 days ago · 6 km deep · 84 km away
  28. 2.56 km W of Cobb, California · 17845 days ago · -1 km deep · 52 km away
  29. 1.811 km NE of Angwin, California · 17845 days ago · 10 km deep · 11 km away
  30. 1.84 km ESE of Clear Lake Riviera, California · 17845 days ago · 5 km deep · 54 km away
  31. 1.91 km NW of Larkfield-Wikiup, California · 17842 days ago · 2 km deep · 39 km away
  32. 2.47 km W of Cobb, California · 17842 days ago · 3 km deep · 53 km away
  33. 1.90 km ESE of Clear Lake Riviera, California · 17841 days ago · 1 km deep · 57 km away
  34. 2.56 km W of Cobb, California · 17840 days ago · 3 km deep · 53 km away
  35. 1.810 km SE of Boonville, California · 17840 days ago · 5 km deep · 95 km away
  36. 1.62 km NW of Cobb, California · 17838 days ago · 1 km deep · 49 km away
  37. 2.24 km WSW of Moskowite Corner, California · 17836 days ago · 8 km deep · 14 km away
  38. 1.76 km W of Cobb, California · 17832 days ago · 4 km deep · 52 km away
  39. 2.04 km WSW of Granite Bay, California · 17832 days ago · 12 km deep · 98 km away
  40. 2.110 km ENE of Healdsburg, California · 17832 days ago · 5 km deep · 41 km away
  41. 3.28 km WSW of Cobb, California · 17830 days ago · 1 km deep · 53 km away
  42. 2.68 km WSW of Cobb, California · 17830 days ago · 0 km deep · 53 km away
  43. 2.19 km WSW of Cobb, California · 17830 days ago · 1 km deep · 53 km away
  44. 1.66 km ENE of Santa Rosa, California · 17830 days ago · 6 km deep · 31 km away
  45. 2.29 km WSW of Cobb, California · 17829 days ago · 0 km deep · 53 km away
  46. 1.7Northern California · 17828 days ago · 7 km deep · 43 km away
  47. 2.0Northern California · 17828 days ago · 5 km deep · 42 km away
  48. 1.911 km ESE of Suisun, California · 17828 days ago · 7 km deep · 52 km away
  49. 2.18 km SE of Blackhawk, California · 17826 days ago · 3 km deep · 95 km away
  50. 2.18 km SE of Blackhawk, California · 17826 days ago · 3 km deep · 96 km away
  51. 1.68 km W of Saint Helena, California · 17825 days ago · 6 km deep · 23 km away
  52. 2.17 km SW of Calistoga, California · 17825 days ago · 6 km deep · 28 km away
  53. 1.57 km W of Cobb, California · 17825 days ago · 3 km deep · 53 km away
  54. 3.010 km NE of Healdsburg, California · 17825 days ago · 6 km deep · 43 km away
  55. 1.710 km NE of Healdsburg, California · 17825 days ago · 5 km deep · 43 km away
  56. 1.71 km NNE of East Richmond Heights, California · 17824 days ago · 9 km deep · 65 km away
  57. 1.61 km NNW of Pleasant Hill, California · 17823 days ago · 9 km deep · 69 km away
  58. 1.74 km NNE of San Leandro, California · 17822 days ago · 5 km deep · 88 km away
  59. 2.63 km ENE of Berkeley, California · 17820 days ago · 10 km deep · 74 km away
  60. 1.72 km ENE of Berkeley, California · 17820 days ago · 8 km deep · 74 km away

The first 60 of 97.

Before

  1. 2.27 km E of Cloverdale, California · 17861 days ago · 2 km deep · 61 km away
  2. 1.57 km WSW of Cobb, California · 17863 days ago · 1 km deep · 52 km away
  3. 2.17 km W of Cobb, California · 17863 days ago · 0 km deep · 53 km away
  4. 1.56 km W of Cobb, California · 17863 days ago · 0 km deep · 51 km away
  5. 2.15 km SW of Clearlake, California · 17864 days ago · 3 km deep · 52 km away
  6. 2.116 km NE of Lucerne, California · 17866 days ago · 7 km deep · 80 km away
  7. 2.35 km SW of Glen Ellen, California · 17868 days ago · 10 km deep · 33 km away
  8. 1.54 km S of Clear Lake Riviera, California · 17868 days ago · 1 km deep · 54 km away
  9. 1.78 km W of Cobb, California · 17868 days ago · 1 km deep · 54 km away
  10. 1.96 km SW of Glen Ellen, California · 17869 days ago · 7 km deep · 34 km away
  11. 2.56 km W of Cobb, California · 17870 days ago · 3 km deep · 52 km away
  12. 3.35 km WSW of Glen Ellen, California · 17870 days ago · 11 km deep · 33 km away
  13. 2.02 km ESE of Clearlake, California · 17875 days ago · 5 km deep · 52 km away
  14. 1.97 km WSW of Cobb, California · 17875 days ago · 3 km deep · 51 km away
  15. 1.611 km NE of Healdsburg, California · 17875 days ago · 5 km deep · 42 km away
  16. 2.42 km E of North Gate, California · 17876 days ago · 15 km deep · 77 km away
  17. 1.810 km NE of Healdsburg, California · 17876 days ago · 5 km deep · 42 km away
  18. 1.611 km NE of Healdsburg, California · 17877 days ago · 5 km deep · 42 km away
  19. 2.05 km W of Glen Ellen, California · 17879 days ago · 8 km deep · 32 km away
  20. 2.411 km NE of Healdsburg, California · 17880 days ago · 5 km deep · 42 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1037472. Read Tue, Sep 22, 2026, 8:28 PM UTC.