California earthquakes

M1.8 earthquake 30 km NW of Benton, California

A magnitude 1.8 earthquake struck 30 km NW of Benton, California on Thu, Feb 21, 1985, 12:17 PM PST (20:17 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M5.1 4 km NNW of Round Valley, 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1985-02-21 20:17:10 UTC
Depth
3.3 km (2.0 mi), shallow
Epicenter
38.005° N, 118.737° 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, 1.0 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
67°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 169 in the 30 days before it.

After

  1. 2.55 km E of Mammoth Lakes, California · 15198 days ago · 5 km deep · 43 km away
  2. 1.8California-Nevada border region · 15198 days ago · 5 km deep · 43 km away
  3. 1.98 km SW of Swall Meadows, California · 15197 days ago · -1 km deep · 63 km away
  4. 1.68 km SSW of Swall Meadows, California · 15197 days ago · 0 km deep · 62 km away
  5. 1.75 km NNE of Round Valley, California · 15197 days ago · 7 km deep · 62 km away
  6. 1.51 km SW of Dixon Lane-Meadow Creek, California · 15196 days ago · 5 km deep · 75 km away
  7. 1.62 km WNW of Round Valley, California · 15196 days ago · 4 km deep · 65 km away
  8. 1.66 km SSW of Swall Meadows, California · 15196 days ago · 3 km deep · 62 km away
  9. 2.24 km NNW of Round Valley, California · 15196 days ago · 6 km deep · 62 km away
  10. 2.84 km NNW of Round Valley, California · 15196 days ago · 6 km deep · 62 km away
  11. 1.6California-Nevada border region · 15196 days ago · 6 km deep · 44 km away
  12. 1.82 km ESE of Mammoth Lakes, California · 15196 days ago · 5 km deep · 45 km away
  13. 2.42 km ESE of Mammoth Lakes, California · 15196 days ago · 5 km deep · 45 km away
  14. 1.82 km ESE of Mammoth Lakes, California · 15196 days ago · 5 km deep · 45 km away
  15. 1.94 km NNW of Round Valley, California · 15195 days ago · 6 km deep · 62 km away
  16. 1.9California-Nevada border region · 15195 days ago · 7 km deep · 50 km away
  17. 1.87 km ENE of Swall Meadows, California · 15195 days ago · 4 km deep · 53 km away
  18. 2.31 km WNW of Round Valley, California · 15195 days ago · 5 km deep · 66 km away
  19. 1.932 km NW of Benton, California · 15195 days ago · 0 km deep · 5 km away
  20. 1.711 km NW of Aspen Springs, California · 15194 days ago · 5 km deep · 44 km away
  21. 2.04 km SSW of Aspen Springs, California · 15194 days ago · 4 km deep · 55 km away
  22. 1.96 km SSW of Swall Meadows, California · 15194 days ago · 2 km deep · 62 km away
  23. 1.84 km WNW of Round Valley, California · 15193 days ago · 11 km deep · 65 km away
  24. 1.69 km W of Aspen Springs, California · 15193 days ago · 4 km deep · 49 km away
  25. 1.74 km NW of Round Valley, California · 15192 days ago · 5 km deep · 63 km away
  26. 1.812 km SE of Mammoth Lakes, California · 15192 days ago · 3 km deep · 51 km away
  27. 1.631 km ENE of Mono City, California · 15192 days ago · 9 km deep · 19 km away
  28. 1.65 km NW of Round Valley, California · 15192 days ago · 7 km deep · 62 km away
  29. 1.62 km SSW of Swall Meadows, California · 15192 days ago · 6 km deep · 58 km away
  30. 1.611 km WSW of Aspen Springs, California · 15191 days ago · 5 km deep · 55 km away
  31. 2.63 km NE of Swall Meadows, California · 15191 days ago · 2 km deep · 54 km away
  32. 1.93 km NE of Swall Meadows, California · 15191 days ago · 2 km deep · 54 km away
  33. 1.68 km E of Mono City, California · 15191 days ago · 7 km deep · 27 km away
  34. 1.812 km SE of Mammoth Lakes, California · 15190 days ago · 4 km deep · 49 km away
  35. 3.22 km WNW of Round Valley, California · 15190 days ago · 5 km deep · 65 km away
  36. 1.92 km N of Round Valley, California · 15190 days ago · 11 km deep · 64 km away
  37. 1.88 km SSW of Swall Meadows, California · 15189 days ago · -2 km deep · 63 km away
  38. 2.08 km SSW of Swall Meadows, California · 15189 days ago · -1 km deep · 63 km away
  39. 2.62 km WNW of Round Valley, California · 15189 days ago · 5 km deep · 65 km away
  40. 2.22 km WNW of Round Valley, California · 15189 days ago · 5 km deep · 65 km away
  41. 1.94 km WNW of Round Valley, California · 15188 days ago · 11 km deep · 63 km away
  42. 2.96 km WNW of Round Valley, California · 15188 days ago · 2 km deep · 64 km away
  43. 1.66 km WNW of Round Valley, California · 15188 days ago · 2 km deep · 63 km away
  44. 2.96 km WNW of Round Valley, California · 15188 days ago · 2 km deep · 64 km away
  45. 1.79 km E of Mono City, California · 15187 days ago · 8 km deep · 27 km away
  46. 1.53 km N of Round Valley, California · 15187 days ago · 5 km deep · 63 km away
  47. 1.66 km WNW of Round Valley, California · 15187 days ago · 1 km deep · 64 km away
  48. 1.96 km WNW of Round Valley, California · 15187 days ago · 2 km deep · 64 km away
  49. 1.63 km NNW of Round Valley, California · 15186 days ago · 12 km deep · 63 km away
  50. 1.95 km S of Swall Meadows, California · 15186 days ago · 5 km deep · 62 km away
  51. 2.411 km W of Aspen Springs, California · 15186 days ago · 8 km deep · 49 km away
  52. 1.830 km NW of Benton, California · 15186 days ago · 3 km deep · 1 km away
  53. 1.72 km SW of Round Valley, California · 15185 days ago · 4 km deep · 68 km away
  54. 1.831 km ENE of Lee Vining, California · 15185 days ago · 4 km deep · 5 km away
  55. 2.53 km WNW of Round Valley, California · 15185 days ago · 7 km deep · 65 km away
  56. 1.82 km WNW of Aspen Springs, California · 15185 days ago · 3 km deep · 49 km away
  57. 2.9California-Nevada border region · 15185 days ago · 10 km deep · 66 km away
  58. 2.410 km W of Aspen Springs, California · 15184 days ago · 6 km deep · 51 km away
  59. 1.75 km ESE of Swall Meadows, California · 15184 days ago · 5 km deep · 60 km away
  60. 1.55 km NNW of Round Valley, California · 15183 days ago · 7 km deep · 61 km away

The first 60 of at least 199.

Before

  1. 2.36 km ESE of Swall Meadows, California · 15198 days ago · 4 km deep · 60 km away
  2. 2.16 km ESE of Swall Meadows, California · 15198 days ago · 5 km deep · 60 km away
  3. 1.811 km W of Aspen Springs, California · 15198 days ago · 3 km deep · 49 km away
  4. 1.68 km SSW of Swall Meadows, California · 15198 days ago · 2 km deep · 62 km away
  5. 1.85 km S of Mammoth Lakes, California · 15198 days ago · 3 km deep · 50 km away
  6. 1.611 km NW of Aspen Springs, California · 15198 days ago · 2 km deep · 44 km away
  7. 2.14 km SSE of Swall Meadows, California · 15198 days ago · 7 km deep · 61 km away
  8. 2.510 km E of Bass Lake, California · 15198 days ago · 31 km deep · 99 km away
  9. 1.78 km SW of Swall Meadows, California · 15199 days ago · 1 km deep · 63 km away
  10. 2.26 km E of Swall Meadows, California · 15199 days ago · 4 km deep · 58 km away
  11. 1.62 km WNW of Round Valley, California · 15200 days ago · 5 km deep · 65 km away
  12. 1.523 km S of Mammoth Lakes, California · 15200 days ago · 2 km deep · 67 km away
  13. 2.025 km ENE of Mono City, California · 15200 days ago · 9 km deep · 17 km away
  14. 1.911 km SW of Aspen Springs, California · 15201 days ago · 6 km deep · 59 km away
  15. 1.77 km ESE of Mono City, California · 15201 days ago · 9 km deep · 28 km away
  16. 2.53 km N of Wilkerson, California · 15201 days ago · 11 km deep · 83 km away
  17. 1.75 km NW of Dixon Lane-Meadow Creek, California · 15201 days ago · 5 km deep · 70 km away
  18. 2.84 km WNW of Round Valley, California · 15201 days ago · 3 km deep · 64 km away
  19. 1.65 km N of Round Valley, California · 15201 days ago · 6 km deep · 62 km away
  20. 2.25 km NNW of Round Valley, California · 15202 days ago · 8 km deep · 62 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1126070. Read Fri, Oct 2, 2026, 12:24 PM UTC.