California earthquakes

M1.8 earthquake 25 km SSE of Ruth, California

A magnitude 1.8 earthquake struck 25 km SSE of Ruth, California on Sat, Jul 27, 1985, 11:18 AM PDT (18:18 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M2.3 25 km SSE of Ruth, California. This one was a foreshock.

Covelo 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
1.8 (md), micro
Local time
UTC
1985-07-27 18:18:27 UTC
Depth
21.3 km (13.2 mi), shallow
Epicenter
40.063° N, 123.186° 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 0.6 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
96°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 52 in the 60 days after this one and 22 in the 30 days before it.

After

  1. 2.325 km SSE of Ruth, California · 15032 days ago · 22 km deep · 0 km away
  2. 2.125 km WNW of Elk Creek, California · 15030 days ago · 4 km deep · 52 km away
  3. 2.324 km WNW of Elk Creek, California · 15030 days ago · 2 km deep · 51 km away
  4. 1.624 km WNW of Elk Creek, California · 15030 days ago · 4 km deep · 51 km away
  5. 2.820 km ENE of Hydesville, California · 15029 days ago · 21 km deep · 84 km away
  6. 1.77 km ENE of Redcrest, California · 15028 days ago · 23 km deep · 70 km away
  7. 1.70 km SSE of Redwood Valley, California · 15027 days ago · 6 km deep · 89 km away
  8. 1.811 km NE of Potter Valley, California · 15027 days ago · 1 km deep · 75 km away
  9. 1.60 km WSW of Redwood Valley, California · 15027 days ago · 7 km deep · 89 km away
  10. 2.80 km NNE of Redwood Valley, California · 15027 days ago · 6 km deep · 89 km away
  11. 1.50 km SW of Redwood Valley, California · 15027 days ago · 4 km deep · 89 km away
  12. 1.931 km W of Paskenta, California · 15026 days ago · -1 km deep · 29 km away
  13. 2.021 km NNE of Upper Lake, California · 15025 days ago · 6 km deep · 84 km away
  14. 1.86 km E of Calpella, California · 15025 days ago · 5 km deep · 91 km away
  15. 2.56 km E of Hayfork, California · 15024 days ago · 28 km deep · 55 km away
  16. 1.514 km E of Cottonwood, California · 15024 days ago · 10 km deep · 98 km away
  17. 3.725 km NNW of Junction City, California · 15022 days ago · 28 km deep · 98 km away
  18. 2.015 km SW of Paskenta, California · 15021 days ago · 6 km deep · 52 km away
  19. 1.56 km W of Covelo, California · 15021 days ago · 6 km deep · 31 km away
  20. 2.14 km NW of Redwood Valley, California · 15019 days ago · 5 km deep · 86 km away
  21. 1.69 km SW of Alderpoint, California · 15019 days ago · 22 km deep · 42 km away
  22. 1.713 km N of Brooktrails, California · 15018 days ago · 6 km deep · 58 km away
  23. 2.18km NNW of French Gulch, CA · 15015 days ago · 19 km deep · 91 km away
  24. 2.39 km SE of Rancho Tehama Reserve, California · 15015 days ago · 5 km deep · 75 km away
  25. 1.90 km ESE of Redwood Valley, California · 15013 days ago · 6 km deep · 89 km away
  26. 2.09 km SSE of Willits, California · 15008 days ago · 6 km deep · 82 km away
  27. 1.76 km NE of Brooktrails, California · 15006 days ago · 7 km deep · 66 km away
  28. 2.111 km WNW of Hyampom, California · 15003 days ago · 20 km deep · 73 km away
  29. 2.20 km S of Brooktrails, California · 15000 days ago · -1 km deep · 72 km away
  30. 2.419 km SSE of Blue Lake, California · 14998 days ago · 24 km deep · 94 km away
  31. 1.925 km SSW of Scotia, California · 14997 days ago · 7 km deep · 92 km away
  32. 1.89 km ESE of Willits, California · 14995 days ago · 8 km deep · 75 km away
  33. 3.722 km NW of Mad River, California · 14995 days ago · 23 km deep · 73 km away
  34. 1.616 km ENE of Leggett, California · 14994 days ago · 2 km deep · 34 km away
  35. 1.69 km WNW of Anderson, California · 14993 days ago · 6 km deep · 81 km away
  36. 2.59 km SSW of Hyampom, California · 14992 days ago · 5 km deep · 60 km away
  37. 2.58 km SE of Alderpoint, California · 14992 days ago · 3 km deep · 32 km away
  38. 2.121 km W of Hyampom, California · 14992 days ago · 22 km deep · 78 km away
  39. 1.622 km W of Hyampom, California · 14992 days ago · 4 km deep · 74 km away
  40. 1.620 km W of Hyampom, California · 14991 days ago · 18 km deep · 76 km away
  41. 2.32 km NE of Anderson, California · 14987 days ago · 61 km deep · 89 km away
  42. 1.920 km NE of Upper Lake, California · 14987 days ago · -1 km deep · 91 km away
  43. 2.214 km SW of Trinity Center, California · 14986 days ago · 8 km deep · 98 km away
  44. 1.812 km NE of Upper Lake, California · 14985 days ago · 2 km deep · 97 km away
  45. 2.2Northern California · 14985 days ago · 2 km deep · 98 km away
  46. 2.512 km NE of Upper Lake, California · 14984 days ago · 3 km deep · 98 km away
  47. 1.812 km NE of Upper Lake, California · 14984 days ago · 2 km deep · 98 km away
  48. 1.612 km NE of Upper Lake, California · 14983 days ago · 4 km deep · 96 km away
  49. 2.110 km E of Comptche, California · 14981 days ago · 8 km deep · 94 km away
  50. 2.127 km ESE of Covelo, California · 14977 days ago · 4 km deep · 45 km away
  51. 1.71 km SW of Redway, California · 14977 days ago · 19 km deep · 55 km away
  52. 2.210 km SW of Scotia, California · 14972 days ago · 12 km deep · 92 km away

Before

  1. 2.027 km N of Potter Valley, California · 15032 days ago · 4 km deep · 56 km away
  2. 2.112 km NE of Redcrest, California · 15035 days ago · 6 km deep · 71 km away
  3. 2.112 km WSW of Weott, California · 15038 days ago · 0 km deep · 77 km away
  4. 2.220 km W of Weott, California · 15038 days ago · 5 km deep · 87 km away
  5. 1.67 km SE of Willits, California · 15038 days ago · 6 km deep · 79 km away
  6. 1.715 km W of Weott, California · 15041 days ago · 11 km deep · 83 km away
  7. 2.024 km NNE of Potter Valley, California · 15044 days ago · 4 km deep · 61 km away
  8. 1.76 km ESE of Scotia, California · 15047 days ago · 4 km deep · 84 km away
  9. 1.728 km NE of Potter Valley, California · 15048 days ago · 8 km deep · 67 km away
  10. 2.123 km SSW of Scotia, California · 15048 days ago · 11 km deep · 94 km away
  11. 2.07 km NNE of Hyampom, California · 15049 days ago · 4 km deep · 70 km away
  12. 2.210 km W of Scotia, California · 15049 days ago · 21 km deep · 99 km away
  13. 2.810 km W of Scotia, California · 15049 days ago · 22 km deep · 99 km away
  14. 1.619 km SW of Weott, California · 15051 days ago · 4 km deep · 78 km away
  15. 2.53 km N of Redway, California · 15051 days ago · 19 km deep · 54 km away
  16. 2.023 km SE of Covelo, California · 15052 days ago · 4 km deep · 49 km away
  17. 2.318 km NNW of Junction City, California · 15052 days ago · 32 km deep · 90 km away
  18. 2.319 km NNW of Shelter Cove, California · 15053 days ago · 4 km deep · 81 km away
  19. 1.615 km WSW of Weott, California · 15053 days ago · 4 km deep · 79 km away
  20. 1.87 km SSE of Laytonville, California · 15055 days ago · 7 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc52369. Read Tue, Sep 22, 2026, 3:20 PM UTC.