California earthquakes

M1.8 earthquake 1 km NNE of Round Valley, California

A magnitude 1.8 earthquake struck 1 km NNE of Round Valley, California on Mon, Dec 17, 1984, 11:33 PM PST (07:33 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M5.2 31 km ENE of Mono City, 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), micro
Local time
UTC
1984-12-18 07:33:39 UTC
Depth
5.5 km (3.4 mi), shallow
Epicenter
37.431° N, 118.583° 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 0.2 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.31
Depth from
From location
Station coverage gap
127°
Stations used
34

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 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

  1. 2.05 km SSW of Swall Meadows, California · 15262 days ago · 5 km deep · 8 km away
  2. 1.92 km W of Round Valley, California · 15262 days ago · 11 km deep · 4 km away
  3. 1.82 km SE of Round Valley, California · 15262 days ago · 5 km deep · 3 km away
  4. 2.76 km SSW of Swall Meadows, California · 15261 days ago · 2 km deep · 9 km away
  5. 3.06 km SSW of Swall Meadows, California · 15261 days ago · 2 km deep · 9 km away
  6. 2.46 km SSW of Swall Meadows, California · 15261 days ago · 2 km deep · 9 km away
  7. 1.74 km WNW of Round Valley, California · 15261 days ago · 4 km deep · 4 km away
  8. 2.36 km SSW of Swall Meadows, California · 15261 days ago · 0 km deep · 8 km away
  9. 1.713 km WSW of Aspen Springs, California · 15261 days ago · 2 km deep · 27 km away
  10. 1.65 km ESE of Swall Meadows, California · 15261 days ago · 5 km deep · 6 km away
  11. 1.84 km N of Round Valley, California · 15261 days ago · 6 km deep · 3 km away
  12. 1.96 km SSW of Swall Meadows, California · 15261 days ago · 1 km deep · 7 km away
  13. 1.96 km E of Swall Meadows, California · 15261 days ago · 5 km deep · 8 km away
  14. 2.45 km NW of Round Valley, California · 15261 days ago · 5 km deep · 5 km away
  15. 2.73 km NNW of Round Valley, California · 15261 days ago · 11 km deep · 3 km away
  16. 1.89 km WNW of Aspen Springs, California · 15261 days ago · 2 km deep · 26 km away
  17. 1.95 km NW of Round Valley, California · 15261 days ago · 4 km deep · 5 km away
  18. 1.66 km SSW of Swall Meadows, California · 15261 days ago · 3 km deep · 8 km away
  19. 1.65 km SW of Aspen Springs, California · 15261 days ago · 2 km deep · 18 km away
  20. 1.96 km NNE of Round Valley, California · 15261 days ago · 6 km deep · 5 km away
  21. 1.72 km WNW of Round Valley, California · 15261 days ago · 11 km deep · 3 km away
  22. 2.73 km WSW of Round Valley, California · 15260 days ago · 9 km deep · 4 km away
  23. 2.614 km SW of Aspen Springs, California · 15260 days ago · 4 km deep · 23 km away
  24. 1.64 km NNW of Round Valley, California · 15260 days ago · 6 km deep · 4 km away
  25. 1.6California-Nevada border region · 15260 days ago · 5 km deep · 3 km away
  26. 1.6Central California · 15260 days ago · -1 km deep · 79 km away
  27. 1.94 km NW of Round Valley, California · 15260 days ago · 5 km deep · 4 km away
  28. 1.55 km SSW of Swall Meadows, California · 15260 days ago · 7 km deep · 7 km away
  29. 1.82 km NNW of Round Valley, California · 15260 days ago · 9 km deep · 2 km away
  30. 2.42 km NNW of Round Valley, California · 15260 days ago · 9 km deep · 2 km away
  31. 3.52 km NNW of Round Valley, California · 15260 days ago · 10 km deep · 2 km away
  32. 1.72 km NNW of Round Valley, California · 15260 days ago · 10 km deep · 2 km away
  33. 2.35 km N of Round Valley, California · 15260 days ago · 10 km deep · 4 km away
  34. 1.65 km N of Round Valley, California · 15259 days ago · 6 km deep · 4 km away
  35. 3.04 km N of Round Valley, California · 15259 days ago · 9 km deep · 4 km away
  36. 2.34 km SW of Aspen Springs, California · 15259 days ago · 2 km deep · 18 km away
  37. 1.84 km SW of Aspen Springs, California · 15259 days ago · 2 km deep · 18 km away
  38. 1.74 km SW of Aspen Springs, California · 15259 days ago · 2 km deep · 18 km away
  39. 1.60 km WSW of Round Valley, California · 15259 days ago · 5 km deep · 2 km away
  40. 1.84 km SW of Aspen Springs, California · 15259 days ago · 2 km deep · 18 km away
  41. 1.65 km NNW of Round Valley, California · 15259 days ago · 6 km deep · 4 km away
  42. 1.73 km WSW of Aspen Springs, California · 15259 days ago · 1 km deep · 19 km away
  43. 2.23 km NNW of Round Valley, California · 15259 days ago · 8 km deep · 3 km away
  44. 1.53 km SE of Swall Meadows, California · 15259 days ago · 8 km deep · 6 km away
  45. 1.917 km ENE of Lee Vining, California · 15259 days ago · 9 km deep · 73 km away
  46. 1.53 km SSE of Swall Meadows, California · 15258 days ago · 5 km deep · 7 km away
  47. 1.60 km ENE of Round Valley, California · 15258 days ago · 6 km deep · 1 km away
  48. 2.314 km NNE of Mesa, California · 15258 days ago · 10 km deep · 16 km away
  49. 1.65 km SSE of Swall Meadows, California · 15258 days ago · 7 km deep · 5 km away
  50. 1.62 km WNW of Round Valley, California · 15258 days ago · 9 km deep · 2 km away
  51. 1.54 km N of Round Valley, California · 15258 days ago · 8 km deep · 3 km away
  52. 1.9California-Nevada border region · 15258 days ago · 5 km deep · 3 km away
  53. 1.63 km NW of Round Valley, California · 15258 days ago · 10 km deep · 3 km away
  54. 1.92 km W of Round Valley, California · 15258 days ago · 11 km deep · 3 km away
  55. 2.23 km NNW of Round Valley, California · 15258 days ago · 10 km deep · 3 km away
  56. 1.51 km W of Round Valley, California · 15258 days ago · 10 km deep · 2 km away
  57. 1.54 km WNW of Round Valley, California · 15258 days ago · 4 km deep · 4 km away
  58. 1.85 km SSE of Swall Meadows, California · 15258 days ago · 7 km deep · 5 km away
  59. 1.64 km NW of Round Valley, California · 15257 days ago · 4 km deep · 4 km away
  60. 2.02 km WNW of Round Valley, California · 15257 days ago · 4 km deep · 3 km away

The first 60 of at least 201.

Before

  1. 1.63 km NW of Swall Meadows, California · 15262 days ago · 7 km deep · 14 km away
  2. 1.57 km ESE of Swall Meadows, California · 15262 days ago · 4 km deep · 7 km away
  3. 1.96 km SSW of Swall Meadows, California · 15262 days ago · 2 km deep · 8 km away
  4. 2.30 km NNW of Round Valley, California · 15262 days ago · 5 km deep · 1 km away
  5. 1.74 km N of Round Valley, California · 15262 days ago · 9 km deep · 4 km away
  6. 2.711 km ESE of Mammoth Lakes, CA · 15262 days ago · 5 km deep · 31 km away
  7. 3.80 km N of Round Valley, California · 15262 days ago · 6 km deep · 1 km away
  8. 1.95 km NNW of Round Valley, California · 15262 days ago · 11 km deep · 4 km away
  9. 1.60 km N of Round Valley, California · 15262 days ago · 5 km deep · 1 km away
  10. 1.94 km SSW of Swall Meadows, California · 15262 days ago · 3 km deep · 9 km away
  11. 1.67 km WSW of Mammoth Lakes, California · 15262 days ago · 4 km deep · 46 km away
  12. 1.95 km NNE of Round Valley, California · 15262 days ago · 6 km deep · 4 km away
  13. 2.15 km SSW of Swall Meadows, California · 15262 days ago · 0 km deep · 8 km away
  14. 2.26 km SSW of Swall Meadows, California · 15262 days ago · 2 km deep · 9 km away
  15. 1.66 km SSW of Swall Meadows, California · 15262 days ago · 2 km deep · 9 km away
  16. 2.04 km NW of Round Valley, California · 15263 days ago · 5 km deep · 4 km away
  17. 3.1California-Nevada border region · 15263 days ago · 2 km deep · 9 km away
  18. 2.77 km E of Swall Meadows, California · 15263 days ago · 5 km deep · 8 km away
  19. 1.65 km NNW of Round Valley, California · 15263 days ago · 10 km deep · 4 km away
  20. 1.54 km SSW of Swall Meadows, California · 15263 days ago · 5 km deep · 8 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc34877. Read Thu, Oct 1, 2026, 12:48 AM UTC.