California earthquakes

M2.8 earthquake 20 km ENE of Hydesville, California

A magnitude 2.8 earthquake struck 20 km ENE of Hydesville, California on Tue, Jul 30, 1985, 6:59 PM PDT (01:59 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.7 25 km NNW of Junction City, California. This one was a foreshock.

Hydesville 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
2.8 (md), micro
Local time
UTC
1985-07-31 01:59:24 UTC
Depth
20.7 km (12.8 mi), shallow
Epicenter
40.610° N, 123.876° 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 0.3 km horizontally, 0.2 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
109°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 36 in the 60 days after this one and 34 in the 30 days before it.

After

  1. 1.77 km ENE of Redcrest, California · 15028 days ago · 23 km deep · 21 km away
  2. 2.56 km E of Hayfork, California · 15025 days ago · 28 km deep · 65 km away
  3. 3.725 km NNW of Junction City, California · 15022 days ago · 28 km deep · 69 km away
  4. 1.69 km SW of Alderpoint, California · 15019 days ago · 22 km deep · 58 km away
  5. 1.923 km SW of Scotia, California · 15014 days ago · 8 km deep · 47 km away
  6. 2.126 km SW of Scotia, California · 15011 days ago · 10 km deep · 50 km away
  7. 2.146 km W of Ferndale, California · 15008 days ago · 21 km deep · 79 km away
  8. 1.935 km SW of Ferndale, California · 15007 days ago · 12 km deep · 62 km away
  9. 2.336 km SW of Ferndale, California · 15005 days ago · 20 km deep · 64 km away
  10. 2.111 km WNW of Hyampom, California · 15003 days ago · 20 km deep · 25 km away
  11. 2.028 km SSW of Ferndale, California · 15002 days ago · 13 km deep · 54 km away
  12. 2.644 km WSW of Ferndale, California · 15001 days ago · 17 km deep · 75 km away
  13. 2.419 km SSE of Blue Lake, California · 14998 days ago · 24 km deep · 13 km away
  14. 1.925 km SSW of Scotia, California · 14998 days ago · 7 km deep · 47 km away
  15. 1.922 km ESE of Orick, California · 14997 days ago · 4 km deep · 65 km away
  16. 2.4near the coast of Northern California · 14996 days ago · 13 km deep · 43 km away
  17. 3.722 km NW of Mad River, California · 14995 days ago · 23 km deep · 14 km away
  18. 2.024 km WSW of Ferndale, California · 14995 days ago · 26 km deep · 56 km away
  19. 1.616 km ENE of Leggett, California · 14995 days ago · 2 km deep · 84 km away
  20. 2.59 km SSW of Hyampom, California · 14993 days ago · 5 km deep · 32 km away
  21. 2.58 km SE of Alderpoint, California · 14992 days ago · 3 km deep · 62 km away
  22. 2.529 km SW of Ferndale, California · 14992 days ago · 16 km deep · 61 km away
  23. 2.121 km W of Hyampom, California · 14992 days ago · 22 km deep · 15 km away
  24. 1.622 km W of Hyampom, California · 14992 days ago · 4 km deep · 13 km away
  25. 1.620 km W of Hyampom, California · 14992 days ago · 18 km deep · 15 km away
  26. 2.938 km SW of Ferndale, California · 14991 days ago · 19 km deep · 67 km away
  27. 2.837 km SW of Ferndale, California · 14990 days ago · 21 km deep · 65 km away
  28. 2.654 km SW of Ferndale, California · 14987 days ago · 7 km deep · 84 km away
  29. 2.214 km SW of Trinity Center, California · 14986 days ago · 8 km deep · 94 km away
  30. 3.337 km SW of Ferndale, California · 14986 days ago · 2 km deep · 68 km away
  31. 1.71 km SW of Redway, California · 14977 days ago · 19 km deep · 56 km away
  32. 3.656 km WSW of Ferndale, California · 14976 days ago · 7 km deep · 88 km away
  33. 2.210 km SW of Scotia, California · 14973 days ago · 12 km deep · 33 km away
  34. 1.648 km SW of Ferndale, California · 14971 days ago · 3 km deep · 79 km away
  35. 2.04 km NE of Hydesville, California · 14971 days ago · 25 km deep · 16 km away
  36. 1.831 km SSW of Ferndale, California · 14969 days ago · 4 km deep · 57 km away

Before

  1. 3.418 km W of Big Lagoon, California · 15030 days ago · -1 km deep · 72 km away
  2. 2.627 km SSW of Ferndale, California · 15030 days ago · 15 km deep · 54 km away
  3. 2.325 km SSE of Ruth, California · 15032 days ago · 22 km deep · 84 km away
  4. 1.825 km SSE of Ruth, California · 15032 days ago · 21 km deep · 84 km away
  5. 5.063 km WSW of Ferndale, California · 15033 days ago · 4 km deep · 95 km away
  6. 2.112 km NE of Redcrest, California · 15035 days ago · 6 km deep · 17 km away
  7. 2.112 km WSW of Weott, California · 15039 days ago · 0 km deep · 40 km away
  8. 2.220 km W of Weott, California · 15039 days ago · 5 km deep · 43 km away
  9. 1.715 km W of Weott, California · 15041 days ago · 11 km deep · 38 km away
  10. 3.09km N of Petrolia, CA · 15041 days ago · 24 km deep · 41 km away
  11. 2.436 km SW of Ferndale, California · 15046 days ago · 9 km deep · 64 km away
  12. 3.329 km W of Shelter Cove, California · 15046 days ago · 5 km deep · 76 km away
  13. 1.76 km ESE of Scotia, California · 15048 days ago · 4 km deep · 21 km away
  14. 2.123 km SSW of Scotia, California · 15049 days ago · 11 km deep · 47 km away
  15. 2.07 km NNE of Hyampom, California · 15049 days ago · 4 km deep · 40 km away
  16. 2.210 km W of Scotia, California · 15049 days ago · 21 km deep · 34 km away
  17. 2.810 km W of Scotia, California · 15049 days ago · 22 km deep · 34 km away
  18. 1.7near the coast of Northern California · 15051 days ago · 4 km deep · 56 km away
  19. 1.8near the coast of Northern California · 15051 days ago · 17 km deep · 55 km away
  20. 1.619 km SW of Weott, California · 15051 days ago · 4 km deep · 48 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc53663. Read Tue, Sep 22, 2026, 8:33 PM UTC.