California earthquakes

M1.8 earthquake 1 km E of Aromas, California

A magnitude 1.8 earthquake struck 1 km E of Aromas, California on Sun, Dec 30, 1984, 9:52 AM PST (17:52 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.4 8 km ENE of Morgan Hill, California. This one was a foreshock.

Aromas 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
1984-12-30 17:52:04 UTC
Depth
8.5 km (5.3 mi), shallow
Epicenter
36.889° N, 121.629° 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, 0.3 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
50°
Stations used
50

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 159 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.48 km ENE of Morgan Hill, California · 15240 days ago · 2 km deep · 31 km away
  2. 1.624 km ENE of Greenfield, California · 15239 days ago · 6 km deep · 74 km away
  3. 1.812 km N of Morgan Hill, California · 15239 days ago · 3 km deep · 40 km away
  4. 1.516 km N of Morgan Hill, California · 15238 days ago · 6 km deep · 43 km away
  5. 2.016 km ESE of Livermore, California · 15238 days ago · 6 km deep · 80 km away
  6. 1.625 km W of Three Rocks, California · 15237 days ago · 0 km deep · 95 km away
  7. 2.015 km N of Morgan Hill, California · 15237 days ago · 6 km deep · 42 km away
  8. 1.939 km ENE of Soledad, California · 15236 days ago · 6 km deep · 71 km away
  9. 2.424 km NE of King City, California · 15235 days ago · 10 km deep · 85 km away
  10. 2.211 km SSE of Davenport, California · 15235 days ago · 0 km deep · 47 km away
  11. 1.524 km WNW of Three Rocks, California · 15235 days ago · 7 km deep · 94 km away
  12. 1.71 km ENE of Woodside, California · 15234 days ago · 5 km deep · 81 km away
  13. 2.115 km E of Seven Trees, California · 15234 days ago · 8 km deep · 44 km away
  14. 3.522 km NNE of Soledad, California · 15234 days ago · 9 km deep · 49 km away
  15. 2.423 km NE of King City, California · 15233 days ago · 6 km deep · 82 km away
  16. 2.124 km NE of Greenfield, California · 15233 days ago · 5 km deep · 70 km away
  17. 1.515 km N of Morgan Hill, California · 15233 days ago · 6 km deep · 43 km away
  18. 1.822 km NNE of Soledad, California · 15232 days ago · 8 km deep · 50 km away
  19. 2.422 km NNE of Soledad, California · 15232 days ago · 8 km deep · 50 km away
  20. 1.614 km N of Morgan Hill, California · 15232 days ago · 5 km deep · 41 km away
  21. 1.625 km ENE of Greenfield, California · 15232 days ago · 2 km deep · 74 km away
  22. 1.624 km ENE of Greenfield, California · 15232 days ago · 2 km deep · 74 km away
  23. 1.523 km NE of King City, California · 15232 days ago · 5 km deep · 83 km away
  24. 2.4Near the coast of Central California · 15231 days ago · 5 km deep · 48 km away
  25. 1.815 km E of Seven Trees, California · 15231 days ago · 6 km deep · 44 km away
  26. 1.512 km S of Davenport, California · 15231 days ago · 4 km deep · 50 km away
  27. 2.3Central California · 15230 days ago · 4 km deep · 30 km away
  28. 3.214 km N of Morgan Hill, California · 15230 days ago · 4 km deep · 41 km away
  29. 2.714 km NNE of Morgan Hill, California · 15229 days ago · 3 km deep · 41 km away
  30. 1.914 km NNE of Morgan Hill, California · 15229 days ago · 3 km deep · 41 km away
  31. 1.623 km NE of King City, California · 15228 days ago · 6 km deep · 82 km away
  32. 1.914 km E of Seven Trees, California · 15228 days ago · 2 km deep · 45 km away
  33. 1.714 km NNE of Morgan Hill, California · 15228 days ago · 3 km deep · 41 km away
  34. 1.714 km E of Seven Trees, California · 15228 days ago · 1 km deep · 45 km away
  35. 1.59 km N of Morgan Hill, California · 15228 days ago · 3 km deep · 37 km away
  36. 1.914 km E of Seven Trees, California · 15227 days ago · 2 km deep · 45 km away
  37. 2.214 km NNE of Morgan Hill, California · 15227 days ago · 3 km deep · 41 km away
  38. 2.216 km ESE of East Foothills, California · 15226 days ago · 5 km deep · 47 km away
  39. 1.515 km N of Morgan Hill, California · 15226 days ago · 8 km deep · 43 km away
  40. 1.515 km E of Seven Trees, California · 15225 days ago · 6 km deep · 45 km away
  41. 2.122 km NNE of Soledad, California · 15225 days ago · 8 km deep · 49 km away
  42. 1.721 km NNE of Soledad, California · 15224 days ago · 8 km deep · 50 km away
  43. 1.56 km WSW of Gilroy, California · 15224 days ago · 5 km deep · 10 km away
  44. 1.85 km SW of Gilroy, California · 15224 days ago · 5 km deep · 10 km away
  45. 2.18 km N of Morgan Hill, California · 15222 days ago · 3 km deep · 35 km away
  46. 2.78 km N of Morgan Hill, California · 15222 days ago · 4 km deep · 35 km away
  47. 2.324 km NE of Greenfield, California · 15222 days ago · 7 km deep · 70 km away
  48. 2.615 km E of Seven Trees, California · 15221 days ago · 4 km deep · 44 km away
  49. 1.57 km E of East Foothills, California · 15219 days ago · 6 km deep · 55 km away
  50. 1.623 km NE of King City, California · 15219 days ago · 6 km deep · 82 km away
  51. 1.917 km ENE of East Foothills, California · 15219 days ago · 5 km deep · 59 km away
  52. 2.619 km SE of Tres Pinos, California · 15218 days ago · 5 km deep · 47 km away
  53. 2.220 km SE of Tres Pinos, California · 15218 days ago · 5 km deep · 48 km away
  54. 1.720 km SE of Tres Pinos, California · 15218 days ago · 5 km deep · 48 km away
  55. 1.610 km ENE of Tres Pinos, California · 15218 days ago · 7 km deep · 39 km away
  56. 1.619 km SSE of Tres Pinos, California · 15217 days ago · 5 km deep · 47 km away
  57. 2.07 km ENE of Gilroy, California · 15217 days ago · 5 km deep · 20 km away
  58. 1.519 km SSE of Tres Pinos, California · 15217 days ago · 5 km deep · 47 km away
  59. 1.5Central California · 15217 days ago · 6 km deep · 47 km away
  60. 1.622 km NE of San Lucas, California · 15216 days ago · 6 km deep · 99 km away

The first 60 of 159.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc35784. Read Tue, Sep 22, 2026, 9:10 AM UTC.