California earthquakes

M2.1 earthquake 16 km W of Samoa, California

A magnitude 2.1 earthquake struck 16 km W of Samoa, California on Thu, Mar 31, 1977, 7:22 PM PST (03:22 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M3.6 10 km NE of Hydesville, California. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
2.1 (md), micro
Local time
UTC
1977-04-01 03:22:30 UTC
Depth
22.3 km (13.8 mi), shallow
Epicenter
40.825° N, 124.379° 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 1.1 km horizontally, 0.6 km in depth
Depth from
From location
Station coverage gap
240°, poorly surrounded by stations
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 79 in the 60 days after this one and 27 in the 30 days before it.

After

  1. 3.610 km NE of Hydesville, California · 18071 days ago · 22 km deep · 40 km away
  2. 2.711 km NE of Hydesville, California · 18070 days ago · 22 km deep · 40 km away
  3. 3.136 km WNW of Big Lagoon, California · 18070 days ago · 17 km deep · 48 km away
  4. 3.279 km W of Ferndale, California · 18070 days ago · 5 km deep · 79 km away
  5. 3.011 km NE of Hydesville, California · 18069 days ago · 21 km deep · 40 km away
  6. 1.919 km W of Ferndale, California · 18069 days ago · 20 km deep · 30 km away
  7. 3.023 km WSW of Ferndale, California · 18069 days ago · 22 km deep · 41 km away
  8. 1.53 km SW of Mad River, California · 18068 days ago · 28 km deep · 84 km away
  9. 1.74 km WSW of Scotia, California · 18068 days ago · 23 km deep · 44 km away
  10. 2.627 km SSW of Ferndale, California · 18068 days ago · 27 km deep · 51 km away
  11. 1.517 km SSE of Blue Lake, California · 18068 days ago · 24 km deep · 43 km away
  12. 1.526 km SW of Ferndale, California · 18066 days ago · 19 km deep · 45 km away
  13. 2.978 km W of Trinidad, California · 18065 days ago · 9 km deep · 64 km away
  14. 3.087 km W of Trinidad, California · 18065 days ago · 4 km deep · 74 km away
  15. 1.845 km WNW of Indianola, California · 18065 days ago · 20 km deep · 32 km away
  16. 1.77 km W of Rio Dell, California · 18065 days ago · 18 km deep · 40 km away
  17. 1.832 km WSW of Ferndale, California · 18065 days ago · 21 km deep · 48 km away
  18. 2.040 km WSW of Ferndale, California · 18063 days ago · 17 km deep · 55 km away
  19. 3.039 km WSW of Ferndale, California · 18062 days ago · 19 km deep · 48 km away
  20. 4.149 km WSW of Ferndale, California · 18061 days ago · 28 km deep · 57 km away
  21. 3.550 km WSW of Ferndale, California · 18061 days ago · 25 km deep · 58 km away
  22. 1.715 km NE of Myers Flat, California · 18059 days ago · 27 km deep · 75 km away
  23. 1.614 km ENE of Hyampom, California · 18059 days ago · 4 km deep · 93 km away
  24. 2.34 km ESE of Pine Hills, California · 18058 days ago · 24 km deep · 26 km away
  25. 2.730 km SW of Ferndale, California · 18058 days ago · 28 km deep · 47 km away
  26. 2.528 km SSW of Ferndale, California · 18057 days ago · 19 km deep · 55 km away
  27. 1.84 km SW of Indianola, California · 18057 days ago · 23 km deep · 20 km away
  28. 2.031 km SW of Ferndale, California · 18056 days ago · 23 km deep · 53 km away
  29. 2.53 km SW of Garberville, California · 18056 days ago · 14 km deep · 95 km away
  30. 2.527 km SSW of Ferndale, California · 18055 days ago · 25 km deep · 52 km away
  31. 2.310 km S of Ferndale, California · 18051 days ago · 19 km deep · 39 km away
  32. 2.2near the coast of Northern California · 18051 days ago · 21 km deep · 45 km away
  33. 1.940 km WNW of Indianola, California · 18051 days ago · 21 km deep · 27 km away
  34. 1.86 km WNW of Ferndale, California · 18048 days ago · 26 km deep · 25 km away
  35. 1.79 km W of Indianola, California · 18048 days ago · 22 km deep · 17 km away
  36. 3.227 km SSW of Ferndale, California · 18047 days ago · 20 km deep · 54 km away
  37. 2.740 km SSW of Ferndale, California · 18044 days ago · 13 km deep · 64 km away
  38. 1.832 km WSW of Ferndale, California · 18044 days ago · 25 km deep · 43 km away
  39. 2.314 km SW of Mad River, California · 18042 days ago · 11 km deep · 81 km away
  40. 3.021 km WSW of Weott, California · 18042 days ago · 7 km deep · 70 km away
  41. 2.470 km W of Big Lagoon, California · 18042 days ago · 10 km deep · 62 km away
  42. 3.178 km W of Ferndale, California · 18041 days ago · 5 km deep · 72 km away
  43. 2.523 km SSW of Ferndale, California · 18040 days ago · 24 km deep · 48 km away
  44. 2.252 km W of Ferndale, California · 18038 days ago · 2 km deep · 50 km away
  45. 1.839 km WSW of Ferndale, California · 18037 days ago · 5 km deep · 47 km away
  46. 1.744 km WSW of Ferndale, California · 18036 days ago · 23 km deep · 50 km away
  47. 1.651 km W of Ferndale, California · 18035 days ago · 22 km deep · 54 km away
  48. 2.631 km WSW of Ferndale, California · 18034 days ago · 22 km deep · 47 km away
  49. 2.434 km W of Ferndale, California · 18033 days ago · 21 km deep · 40 km away
  50. 3.959 km W of Big Lagoon, California · 18033 days ago · 0 km deep · 53 km away
  51. 1.945 km WSW of Ferndale, California · 18033 days ago · 17 km deep · 59 km away
  52. 2.03 km W of Hydesville, California · 18033 days ago · 5 km deep · 37 km away
  53. 1.85 km W of Willow Creek, California · 18032 days ago · 32 km deep · 59 km away
  54. 2.816 km SW of Ferndale, California · 18031 days ago · 24 km deep · 37 km away
  55. 2.816 km WSW of Ferndale, California · 18031 days ago · 24 km deep · 37 km away
  56. 3.033 km SW of Ferndale, California · 18031 days ago · 24 km deep · 56 km away
  57. 2.59 km S of Hyampom, California · 18030 days ago · 0 km deep · 83 km away
  58. 3.117 km WSW of Scotia, California · 18029 days ago · 20 km deep · 48 km away
  59. 2.316 km WSW of Scotia, California · 18029 days ago · 19 km deep · 48 km away
  60. 2.468 km W of Trinidad, California · 18027 days ago · 5 km deep · 59 km away

The first 60 of 79.

Before

  1. 2.419 km SW of Ferndale, California · 18073 days ago · 23 km deep · 39 km away
  2. 1.611 km NNW of Mad River, California · 18074 days ago · 2 km deep · 75 km away
  3. 2.511 km W of Samoa, California · 18074 days ago · 25 km deep · 5 km away
  4. 2.617 km E of Big Lagoon, California · 18074 days ago · 21 km deep · 53 km away
  5. 1.711 km NNW of Mad River, California · 18076 days ago · 2 km deep · 75 km away
  6. 2.050 km W of Indianola, California · 18076 days ago · 25 km deep · 39 km away
  7. 2.145 km WSW of Ferndale, California · 18078 days ago · 14 km deep · 57 km away
  8. 2.615 km W of Junction City, California · 18079 days ago · 13 km deep · 96 km away
  9. 2.132 km W of Ferndale, California · 18080 days ago · 31 km deep · 35 km away
  10. 2.214 km E of Mad River, California · 18081 days ago · 28 km deep · 96 km away
  11. 2.668 km W of Ferndale, California · 18081 days ago · 5 km deep · 68 km away
  12. 1.58 km NNW of Redcrest, California · 18082 days ago · 28 km deep · 52 km away
  13. 2.410 km WNW of Ferndale, California · 18082 days ago · 24 km deep · 24 km away
  14. 2.623 km SW of Ferndale, California · 18083 days ago · 23 km deep · 42 km away
  15. 1.618 km W of Ferndale, California · 18084 days ago · 21 km deep · 30 km away
  16. 2.214 km SSW of Mad River, California · 18086 days ago · 28 km deep · 88 km away
  17. 2.054 km W of Ferndale, California · 18087 days ago · 42 km deep · 50 km away
  18. 1.525 km W of Hyampom, California · 18088 days ago · 8 km deep · 58 km away
  19. 1.924 km W of Hyampom, California · 18088 days ago · 7 km deep · 59 km away
  20. 1.516 km SSW of Ferndale, California · 18091 days ago · 30 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1034620. Read Tue, Sep 22, 2026, 8:44 PM UTC.