California earthquakes

M1.5 earthquake 3 km ESE of Aromas, California

A magnitude 1.5 earthquake struck 3 km ESE of Aromas, California on Mon, Apr 23, 1984, 3:11 AM PST (11:11 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M6.2 The 1984 Morgan Hill, California Earthquake. 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
1.5 (md), micro
Local time
UTC
1984-04-23 11:11:15 UTC
Depth
7.1 km (4.4 mi), shallow
Epicenter
36.875° N, 121.610° 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, 0.4 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
57°
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: 197 in the 60 days after this one and 51 in the 30 days before it.

After

  1. 2.23 km ESE of Aromas, California · 15500 days ago · 7 km deep · 0 km away
  2. 1.54 km NE of San Martin, California · 15500 days ago · 5 km deep · 26 km away
  3. 6.2The 1984 Morgan Hill, California Earthquake · 15499 days ago · 8 km deep · 49 km away
  4. 3.915 km E of Seven Trees, California · 15499 days ago · 6 km deep · 46 km away
  5. 2.615 km E of Seven Trees, California · 15499 days ago · 9 km deep · 46 km away
  6. 3.415 km E of Seven Trees, California · 15499 days ago · 5 km deep · 46 km away
  7. 3.316 km N of Morgan Hill, California · 15499 days ago · 8 km deep · 45 km away
  8. 3.114 km N of Morgan Hill, California · 15499 days ago · 6 km deep · 43 km away
  9. 2.119 km ESE of East Foothills, California · 15499 days ago · 5 km deep · 48 km away
  10. 2.012 km N of Morgan Hill, California · 15499 days ago · 4 km deep · 41 km away
  11. 2.516 km E of Seven Trees, California · 15499 days ago · 8 km deep · 46 km away
  12. 2.116 km N of Morgan Hill, California · 15499 days ago · 5 km deep · 45 km away
  13. 1.711 km NNE of Morgan Hill, California · 15499 days ago · 9 km deep · 39 km away
  14. 1.810 km NE of Morgan Hill, California · 15499 days ago · 8 km deep · 36 km away
  15. 1.614 km N of Morgan Hill, California · 15499 days ago · 6 km deep · 43 km away
  16. 1.514 km E of Seven Trees, California · 15499 days ago · 4 km deep · 47 km away
  17. 2.613 km N of Morgan Hill, California · 15499 days ago · 4 km deep · 42 km away
  18. 1.512 km NNE of Morgan Hill, California · 15499 days ago · 4 km deep · 41 km away
  19. 2.29 km NNE of Morgan Hill, California · 15499 days ago · 5 km deep · 37 km away
  20. 2.214 km N of Morgan Hill, California · 15499 days ago · 7 km deep · 43 km away
  21. 2.110 km NE of Morgan Hill, California · 15499 days ago · 9 km deep · 36 km away
  22. 2.816 km N of Morgan Hill, California · 15499 days ago · 6 km deep · 45 km away
  23. 3.510 km NNE of Morgan Hill, California · 15499 days ago · 9 km deep · 38 km away · felt by 113
  24. 1.814 km E of Seven Trees, California · 15499 days ago · 5 km deep · 47 km away
  25. 2.914 km N of Morgan Hill, California · 15499 days ago · 4 km deep · 43 km away
  26. 3.114 km N of Morgan Hill, California · 15499 days ago · 4 km deep · 43 km away
  27. 2.714 km N of Morgan Hill, California · 15499 days ago · 5 km deep · 43 km away
  28. 2.016 km N of Morgan Hill, California · 15499 days ago · 7 km deep · 45 km away
  29. 1.614 km E of Seven Trees, California · 15499 days ago · 5 km deep · 47 km away
  30. 2.310 km ESE of East Foothills, California · 15499 days ago · 7 km deep · 53 km away
  31. 1.613 km N of Morgan Hill, California · 15499 days ago · 4 km deep · 42 km away
  32. 1.614 km E of Seven Trees, California · 15499 days ago · 8 km deep · 48 km away
  33. 3.113 km ESE of Alum Rock, California · 15499 days ago · 6 km deep · 49 km away
  34. 1.716 km N of Morgan Hill, California · 15499 days ago · 5 km deep · 45 km away
  35. 1.812 km N of Morgan Hill, California · 15499 days ago · 4 km deep · 41 km away
  36. 2.214 km E of Seven Trees, California · 15499 days ago · 5 km deep · 49 km away
  37. 2.410 km ESE of East Foothills, California · 15499 days ago · 7 km deep · 53 km away
  38. 1.910 km ESE of East Foothills, California · 15499 days ago · 7 km deep · 53 km away
  39. 1.813 km ESE of Alum Rock, California · 15499 days ago · 7 km deep · 49 km away
  40. 2.212 km N of Morgan Hill, California · 15499 days ago · 4 km deep · 41 km away
  41. 1.6Northern California · 15499 days ago · 1 km deep · 30 km away
  42. 2.610 km NNE of Morgan Hill, California · 15499 days ago · 9 km deep · 38 km away
  43. 2.014 km E of Seven Trees, California · 15499 days ago · 2 km deep · 47 km away
  44. 2.214 km E of Seven Trees, California · 15499 days ago · 5 km deep · 48 km away
  45. 1.614 km E of Seven Trees, California · 15499 days ago · 5 km deep · 47 km away
  46. 1.614 km E of Seven Trees, California · 15499 days ago · 0 km deep · 46 km away
  47. 1.613 km N of Morgan Hill, California · 15499 days ago · 5 km deep · 42 km away
  48. 1.616 km E of Seven Trees, California · 15499 days ago · 9 km deep · 45 km away
  49. 2.613 km N of Morgan Hill, California · 15499 days ago · 5 km deep · 42 km away
  50. 3.115 km E of Seven Trees, California · 15499 days ago · 3 km deep · 46 km away
  51. 2.015 km E of Seven Trees, California · 15499 days ago · 3 km deep · 46 km away
  52. 1.813 km ESE of Alum Rock, California · 15499 days ago · 8 km deep · 49 km away
  53. 2.816 km N of Morgan Hill, California · 15499 days ago · 8 km deep · 45 km away
  54. 1.512 km ESE of Seven Trees, California · 15499 days ago · 10 km deep · 43 km away
  55. 1.87 km ENE of Morgan Hill, California · 15499 days ago · 4 km deep · 31 km away
  56. 1.89 km NNE of San Martin, California · 15499 days ago · 5 km deep · 32 km away
  57. 2.013 km N of Morgan Hill, California · 15499 days ago · 5 km deep · 42 km away
  58. 1.916 km N of Morgan Hill, California · 15499 days ago · 2 km deep · 45 km away
  59. 1.716 km E of Seven Trees, California · 15498 days ago · 5 km deep · 45 km away
  60. 1.89 km NNE of Morgan Hill, California · 15498 days ago · 3 km deep · 37 km away

The first 60 of 197.

Before

  1. 2.03 km ESE of Aromas, California · 15500 days ago · 6 km deep · 0 km away
  2. 2.111 km S of Tres Pinos, California · 15501 days ago · 8 km deep · 33 km away
  3. 1.912 km N of Morgan Hill, California · 15501 days ago · 6 km deep · 41 km away
  4. 2.025 km NNE of King City, California · 15502 days ago · 1 km deep · 77 km away
  5. 1.78 km ESE of East Foothills, California · 15502 days ago · 2 km deep · 54 km away
  6. 1.821 km NE of Soledad, California · 15503 days ago · 6 km deep · 57 km away
  7. 1.832 km W of Three Rocks, California · 15504 days ago · 10 km deep · 88 km away
  8. 1.822 km NE of San Lucas, California · 15506 days ago · 7 km deep · 96 km away
  9. 1.93 km W of San Juan Bautista, California · 15507 days ago · 6 km deep · 5 km away
  10. 1.824 km NE of King City, California · 15508 days ago · 1 km deep · 80 km away
  11. 2.09 km NE of San Martin, California · 15509 days ago · 8 km deep · 30 km away
  12. 1.812 km SSW of Carmel Valley Village, California · 15509 days ago · 8 km deep · 56 km away
  13. 1.55 km SW of Tres Pinos, California · 15510 days ago · 9 km deep · 25 km away
  14. 1.922 km NE of Soledad, California · 15511 days ago · 2 km deep · 57 km away
  15. 1.815 km E of Big Sur, California · 15513 days ago · 14 km deep · 68 km away
  16. 1.820 km SSE of Tres Pinos, California · 15515 days ago · 4 km deep · 44 km away
  17. 1.63 km NNW of Hollister, California · 15515 days ago · 6 km deep · 17 km away
  18. 2.224 km NE of Greenfield, California · 15515 days ago · 5 km deep · 67 km away
  19. 1.95 km SSE of San Juan Bautista, California · 15516 days ago · 5 km deep · 12 km away
  20. 2.88 km W of Diablo Grande, California · 15517 days ago · 10 km deep · 62 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc16239. Read Wed, Sep 30, 2026, 7:17 PM UTC.