California earthquakes

M2.1 earthquake 2 km SW of Mesa, California

A magnitude 2.1 earthquake struck 2 km SW of Mesa, California on Sun, Dec 9, 1984, 7:47 PM PST (03:47 UTC), 6 km (4 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
2.1 (md), micro
Local time
UTC
1984-12-10 03:47:33 UTC
Depth
6.1 km (3.8 mi), shallow
Epicenter
37.405° N, 118.562° 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, 0.6 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
99°
Stations used
41

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

After

  1. 2.34 km WNW of Round Valley, California · 15269 days ago · 3 km deep · 7 km away
  2. 1.53 km NNE of Round Valley, California · 15269 days ago · 10 km deep · 5 km away
  3. 1.84 km N of Round Valley, California · 15269 days ago · 7 km deep · 7 km away
  4. 1.77 km SSW of Swall Meadows, California · 15269 days ago · 2 km deep · 11 km away
  5. 1.53 km NNE of Round Valley, California · 15269 days ago · 14 km deep · 5 km away
  6. 1.52 km SSE of Round Valley, California · 15269 days ago · 5 km deep · 2 km away
  7. 1.711 km W of Aspen Springs, California · 15269 days ago · 8 km deep · 30 km away
  8. 1.72 km SE of Round Valley, California · 15269 days ago · 5 km deep · 1 km away
  9. 1.63 km SSE of Round Valley, California · 15269 days ago · 4 km deep · 2 km away
  10. 1.62 km NNW of Round Valley, California · 15269 days ago · 9 km deep · 5 km away
  11. 1.74 km SSW of Swall Meadows, California · 15269 days ago · 5 km deep · 11 km away
  12. 1.62 km S of Swall Meadows, California · 15269 days ago · 4 km deep · 12 km away
  13. 2.05 km SSW of Swall Meadows, California · 15269 days ago · 5 km deep · 11 km away
  14. 1.75 km SSW of Swall Meadows, California · 15269 days ago · 5 km deep · 11 km away
  15. 2.012 km WSW of Aspen Springs, California · 15269 days ago · 6 km deep · 26 km away
  16. 1.82 km S of Round Valley, California · 15269 days ago · 7 km deep · 2 km away
  17. 2.04 km S of Swall Meadows, California · 15268 days ago · 4 km deep · 10 km away
  18. 1.99 km SSE of Dyer, Nevada · 15268 days ago · -2 km deep · 53 km away
  19. 1.75 km NNW of Round Valley, California · 15268 days ago · 7 km deep · 8 km away
  20. 1.76 km SSW of Swall Meadows, California · 15268 days ago · 2 km deep · 10 km away
  21. 2.031 km NW of Benton, California · 15268 days ago · 2 km deep · 71 km away
  22. 2.03 km N of Round Valley, California · 15268 days ago · 3 km deep · 5 km away
  23. 1.87 km E of Swall Meadows, California · 15268 days ago · 2 km deep · 10 km away
  24. 1.612 km WNW of Aspen Springs, California · 15268 days ago · 7 km deep · 32 km away
  25. 1.817 km SW of Swall Meadows, California · 15268 days ago · 19 km deep · 20 km away
  26. 2.22 km WNW of Round Valley, California · 15268 days ago · 7 km deep · 6 km away
  27. 1.74 km NNW of Round Valley, California · 15268 days ago · 6 km deep · 7 km away
  28. 1.81 km NW of Round Valley, California · 15268 days ago · 5 km deep · 4 km away
  29. 1.97 km SSW of Swall Meadows, California · 15268 days ago · 2 km deep · 10 km away
  30. 1.80 km NNW of Round Valley, California · 15268 days ago · 5 km deep · 3 km away
  31. 1.65 km NNW of Round Valley, California · 15268 days ago · 6 km deep · 8 km away
  32. 1.67 km E of Swall Meadows, California · 15267 days ago · 4 km deep · 11 km away
  33. 1.85 km NNW of Round Valley, California · 15267 days ago · 4 km deep · 7 km away
  34. 1.74 km NW of Round Valley, California · 15267 days ago · 4 km deep · 7 km away
  35. 1.95 km SW of Swall Meadows, California · 15267 days ago · 3 km deep · 13 km away
  36. 1.86 km SSW of Swall Meadows, California · 15267 days ago · 3 km deep · 11 km away
  37. 1.95 km SSE of Swall Meadows, CA · 15267 days ago · 6 km deep · 8 km away
  38. 3.34 km WNW of Round Valley, California · 15267 days ago · 3 km deep · 7 km away
  39. 2.43 km WNW of Round Valley, California · 15267 days ago · 9 km deep · 6 km away
  40. 2.020 km E of Fish Camp, California · 15267 days ago · 5 km deep · 76 km away
  41. 2.5California-Nevada border region · 15267 days ago · 1 km deep · 9 km away
  42. 1.60 km W of Round Valley, California · 15267 days ago · 5 km deep · 3 km away
  43. 2.01 km WNW of Round Valley, California · 15267 days ago · 10 km deep · 5 km away
  44. 1.53 km SSW of Swall Meadows, California · 15267 days ago · 3 km deep · 12 km away
  45. 1.66 km SSW of Swall Meadows, California · 15267 days ago · 4 km deep · 11 km away
  46. 1.92 km WNW of Round Valley, California · 15267 days ago · 7 km deep · 6 km away
  47. 1.56 km N of Round Valley, California · 15267 days ago · 5 km deep · 8 km away
  48. 1.610 km SSE of Yosemite Valley, California · 15267 days ago · 4 km deep · 89 km away
  49. 1.91 km SE of Round Valley, California · 15267 days ago · 9 km deep · 1 km away
  50. 1.72 km NW of Round Valley, California · 15266 days ago · 6 km deep · 5 km away
  51. 2.54 km N of Round Valley, California · 15266 days ago · 6 km deep · 7 km away
  52. 3.33 km WNW of Round Valley, California · 15266 days ago · 3 km deep · 6 km away
  53. 1.72 km WNW of Round Valley, California · 15266 days ago · 6 km deep · 5 km away
  54. 2.16 km WNW of Round Valley, California · 15266 days ago · 4 km deep · 9 km away
  55. 1.94 km NNW of Round Valley, California · 15266 days ago · 6 km deep · 7 km away
  56. 1.55 km N of Round Valley, California · 15265 days ago · 10 km deep · 7 km away
  57. 3.04 km WNW of Round Valley, California · 15265 days ago · 3 km deep · 7 km away
  58. 2.54 km N of Round Valley, California · 15265 days ago · 10 km deep · 6 km away
  59. 1.82 km WNW of Round Valley, California · 15265 days ago · 10 km deep · 5 km away
  60. 2.14 km N of Round Valley, California · 15265 days ago · 10 km deep · 7 km away

The first 60 of at least 202.

Before

  1. 2.10 km S of Round Valley, California · 15269 days ago · 5 km deep · 2 km away
  2. 1.66 km SW of Swall Meadows, California · 15269 days ago · 3 km deep · 13 km away
  3. 2.0California-Nevada border region · 15270 days ago · 9 km deep · 7 km away
  4. 1.82 km SSE of Round Valley, California · 15270 days ago · 7 km deep · 2 km away
  5. 2.2California-Nevada border region · 15270 days ago · 7 km deep · 2 km away
  6. 1.74 km N of Round Valley, California · 15270 days ago · 6 km deep · 7 km away
  7. 1.64 km N of Round Valley, California · 15270 days ago · 7 km deep · 7 km away
  8. 1.63 km S of Round Valley, California · 15270 days ago · 7 km deep · 3 km away
  9. 1.91 km NNE of Round Valley, California · 15270 days ago · 5 km deep · 3 km away
  10. 1.74 km W of Aspen Springs, California · 15270 days ago · 4 km deep · 24 km away
  11. 2.35 km SSW of Swall Meadows, California · 15270 days ago · 6 km deep · 11 km away
  12. 1.84 km S of Swall Meadows, California · 15270 days ago · 2 km deep · 10 km away
  13. 2.14 km N of Round Valley, California · 15270 days ago · 6 km deep · 7 km away
  14. 2.14 km NNW of Round Valley, California · 15270 days ago · 5 km deep · 7 km away
  15. 1.74 km N of Round Valley, California · 15270 days ago · 7 km deep · 6 km away
  16. 1.84 km SSE of Swall Meadows, California · 15270 days ago · 7 km deep · 9 km away
  17. 1.95 km NW of Round Valley, California · 15270 days ago · 7 km deep · 8 km away
  18. 2.213 km WSW of Aspen Springs, California · 15270 days ago · 3 km deep · 27 km away
  19. 2.132 km NW of Benton, California · 15270 days ago · 4 km deep · 73 km away
  20. 1.72 km S of Round Valley, California · 15270 days ago · 3 km deep · 3 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc33775 (also filed as ci56550). Read Wed, Sep 30, 2026, 6:13 AM UTC.