California earthquakes

M1.6 earthquake 12 km N of Angwin, California

A magnitude 1.6 earthquake struck 12 km N of Angwin, California on Mon, Sep 18, 1989, 8:08 AM PDT (15:08 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.8 4 km SW of Cobb, 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.

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The earthquake

Magnitude
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1989-09-18 15:08:24 UTC
Depth
2.3 km (1.5 mi), shallow
Epicenter
38.690° N, 122.447° 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 7.1 km horizontally, 14.6 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
277°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 165 in the 60 days after this one and 106 in the 30 days before it.

After

  1. 1.96 km E of Hopland, California · 13530 days ago · 9 km deep · 60 km away
  2. 2.04 km WSW of Cobb, California · 13529 days ago · 1 km deep · 31 km away
  3. 3.64 km WSW of Cobb, California · 13529 days ago · 2 km deep · 31 km away
  4. 3.84 km SW of Cobb, California · 13529 days ago · 5 km deep · 30 km away
  5. 2.17 km WSW of Cobb, California · 13529 days ago · 0 km deep · 34 km away
  6. 1.64 km WSW of Cobb, California · 13529 days ago · 1 km deep · 31 km away
  7. 2.44 km WSW of Cobb, California · 13529 days ago · 2 km deep · 31 km away
  8. 1.74 km W of Cobb, California · 13529 days ago · 2 km deep · 32 km away
  9. 2.96 km W of Cobb, California · 13528 days ago · 2 km deep · 34 km away
  10. 2.16 km W of Cobb, California · 13528 days ago · 1 km deep · 34 km away
  11. 1.88 km SE of Sea Ranch, California · 13528 days ago · 7 km deep · 81 km away
  12. 2.421 km NE of Potter Valley, California · 13528 days ago · 5 km deep · 94 km away
  13. 2.08 km SE of Sea Ranch, California · 13527 days ago · 6 km deep · 82 km away
  14. 1.65 km W of Cobb, California · 13527 days ago · -1 km deep · 33 km away
  15. 1.65 km NE of Talmage, California · 13527 days ago · 4 km deep · 79 km away
  16. 1.99 km W of Cobb, California · 13526 days ago · 1 km deep · 37 km away
  17. 2.25 km N of Geyserville, California · 13525 days ago · 3 km deep · 41 km away
  18. 1.85 km ENE of Clayton, California · 13524 days ago · 14 km deep · 94 km away
  19. 1.67 km SE of Sea Ranch, California · 13523 days ago · 3 km deep · 82 km away
  20. 1.95 km N of Geyserville, California · 13523 days ago · 5 km deep · 39 km away
  21. 3.35 km N of Geyserville, California · 13523 days ago · 5 km deep · 40 km away
  22. 2.16 km N of Geyserville, California · 13523 days ago · 5 km deep · 40 km away
  23. 2.76 km N of Geyserville, California · 13523 days ago · 2 km deep · 41 km away
  24. 2.05 km N of Geyserville, California · 13523 days ago · 5 km deep · 40 km away
  25. 2.06 km WNW of Cobb, California · 13523 days ago · 1 km deep · 35 km away
  26. 1.96 km N of Geyserville, California · 13523 days ago · 4 km deep · 40 km away
  27. 2.55 km N of Geyserville, California · 13523 days ago · 4 km deep · 40 km away
  28. 1.613 km NW of Moskowite Corner, California · 13523 days ago · 2 km deep · 22 km away
  29. 2.4Northern California · 13522 days ago · 4 km deep · 40 km away
  30. 2.45 km N of Geyserville, California · 13522 days ago · 4 km deep · 40 km away
  31. 2.44 km N of Geyserville, California · 13522 days ago · 4 km deep · 40 km away
  32. 1.78 km ENE of Clearlake, California · 13522 days ago · 5 km deep · 33 km away
  33. 1.914 km NW of Moskowite Corner, California · 13522 days ago · 2 km deep · 21 km away
  34. 1.93 km W of Cobb, California · 13521 days ago · 0 km deep · 32 km away
  35. 2.05 km NE of Strawberry, California · 13521 days ago · 9 km deep · 84 km away
  36. 1.814 km E of Angwin, California · 13520 days ago · 1 km deep · 20 km away
  37. 1.65 km W of Cobb, California · 13520 days ago · 2 km deep · 33 km away
  38. 1.57 km W of Cobb, California · 13519 days ago · 0 km deep · 34 km away
  39. 1.74 km W of Cobb, California · 13519 days ago · 2 km deep · 32 km away
  40. 1.711 km W of Cobb, California · 13519 days ago · 3 km deep · 38 km away
  41. 2.56 km W of Cobb, California · 13519 days ago · 3 km deep · 34 km away
  42. 1.910 km WSW of Cobb, California · 13519 days ago · 2 km deep · 36 km away
  43. 1.69 km WNW of Cobb, California · 13518 days ago · 1 km deep · 37 km away
  44. 1.84 km WNW of Cobb, California · 13518 days ago · 2 km deep · 33 km away
  45. 2.12 km ESE of Potter Valley, California · 13518 days ago · 4 km deep · 89 km away
  46. 1.62 km SW of Cottonwood, California · 13518 days ago · 9 km deep · 40 km away
  47. 2.45 km WNW of Cobb, California · 13518 days ago · 0 km deep · 34 km away
  48. 1.95 km W of Cobb, California · 13518 days ago · 1 km deep · 34 km away
  49. 2.012 km N of Pittsburg, California · 13518 days ago · 2 km deep · 78 km away
  50. 2.012 km NNW of Pittsburg, California · 13518 days ago · 3 km deep · 77 km away
  51. 2.714 km N of Pittsburg, California · 13518 days ago · 16 km deep · 76 km away
  52. 2.211 km N of Bay Point, California · 13518 days ago · 14 km deep · 76 km away
  53. 2.112 km N of Pittsburg, California · 13518 days ago · 14 km deep · 77 km away
  54. 2.413 km N of Pittsburg, California · 13518 days ago · 18 km deep · 76 km away
  55. 3.012 km NNE of Bay Point, California · 13518 days ago · 17 km deep · 76 km away
  56. 1.812 km N of Pittsburg, California · 13518 days ago · 5 km deep · 77 km away
  57. 3.213 km SE of Suisun, California · 13518 days ago · 15 km deep · 74 km away
  58. 1.912 km N of Bay Point, California · 13518 days ago · 6 km deep · 76 km away
  59. 1.811 km N of Bay Point, California · 13518 days ago · 1 km deep · 75 km away
  60. 2.113 km NNW of Pittsburg, California · 13518 days ago · 22 km deep · 76 km away

The first 60 of 165.

Before

  1. 2.27 km WSW of Cobb, California · 13531 days ago · 0 km deep · 34 km away
  2. 1.88 km E of Hidden Valley Lake, California · 13531 days ago · 8 km deep · 15 km away
  3. 2.15 km WSW of Cobb, California · 13531 days ago · 2 km deep · 31 km away
  4. 1.912 km NW of Moskowite Corner, California · 13531 days ago · 8 km deep · 22 km away
  5. 1.66 km WSW of Cobb, California · 13532 days ago · 2 km deep · 31 km away
  6. 2.27 km W of Cobb, California · 13532 days ago · -1 km deep · 35 km away
  7. 2.09 km W of Cobb, California · 13532 days ago · -1 km deep · 36 km away
  8. 2.99 km W of Cobb, California · 13532 days ago · -1 km deep · 36 km away
  9. 1.88 km W of Cobb, California · 13532 days ago · 3 km deep · 35 km away
  10. 2.54 km E of Lakeport, California · 13533 days ago · 17 km deep · 53 km away
  11. 2.34 km WNW of North Lakeport, California · 13533 days ago · 3 km deep · 63 km away
  12. 2.89 km W of Cobb, California · 13533 days ago · 1 km deep · 37 km away
  13. 1.78 km NNE of Clearlake Oaks, California · 13533 days ago · 4 km deep · 48 km away
  14. 1.722 km NE of Potter Valley, California · 13533 days ago · 2 km deep · 94 km away
  15. 2.47 km WSW of Cobb, California · 13534 days ago · 1 km deep · 33 km away
  16. 1.76 km W of Cobb, California · 13534 days ago · 0 km deep · 33 km away
  17. 2.55 km W of Cobb, California · 13534 days ago · 0 km deep · 33 km away
  18. 1.79 km W of Cobb, California · 13534 days ago · 1 km deep · 37 km away
  19. 2.09 km W of Cobb, California · 13534 days ago · -1 km deep · 37 km away
  20. 1.86 km W of Cobb, California · 13535 days ago · 4 km deep · 33 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1166038. Read Mon, Oct 5, 2026, 8:35 AM UTC.