California earthquakes

M1.6 earthquake 1 km NNW of Aromas, California

A magnitude 1.6 earthquake struck 1 km NNW of Aromas, California on Thu, Dec 28, 1989, 5:15 AM PST (13:15 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M4.3 36 km WSW of Three Rocks, 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1989-12-28 13:15:32 UTC
Depth
8.8 km (5.5 mi), shallow
Epicenter
36.904° N, 121.651° 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
±0.16
Depth from
From location
Station coverage gap
47°
Stations used
39

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 191 in the 60 days after this one and 188 in the 30 days before it.

After

  1. 1.83 km W of San Juan Bautista, California · 13428 days ago · 6 km deep · 10 km away
  2. 1.83 km SSW of Lexington Hills, California · 13428 days ago · 14 km deep · 39 km away
  3. 1.95 km SW of Monte Sereno, California · 13428 days ago · 10 km deep · 48 km away
  4. 3.13 km N of Interlaken, California · 13428 days ago · 15 km deep · 12 km away
  5. 2.10 km ESE of Lexington Hills, California · 13428 days ago · 9 km deep · 40 km away
  6. 1.93 km SW of Cupertino, California · 13428 days ago · 4 km deep · 57 km away
  7. 2.27 km SW of Monte Sereno, California · 13428 days ago · 13 km deep · 48 km away
  8. 1.62 km SSW of Lexington Hills, California · 13428 days ago · 13 km deep · 40 km away
  9. 2.08 km ENE of San Martin, California · 13428 days ago · 7 km deep · 26 km away
  10. 2.04 km ESE of Interlaken, California · 13427 days ago · 10 km deep · 5 km away
  11. 1.64 km SW of Lexington Hills, California · 13427 days ago · 14 km deep · 41 km away
  12. 1.714 km E of Seven Trees, California · 13427 days ago · 2 km deep · 43 km away
  13. 1.92 km SSW of Lexington Hills, California · 13427 days ago · 13 km deep · 40 km away
  14. 2.61 km SSW of San Juan Bautista, California · 13427 days ago · 2 km deep · 12 km away
  15. 1.86 km SSE of Gilroy, California · 13427 days ago · 6 km deep · 10 km away
  16. 2.23 km S of San Juan Bautista, California · 13426 days ago · 6 km deep · 15 km away
  17. 2.112 km S of Tres Pinos, California · 13426 days ago · 6 km deep · 40 km away
  18. 1.621 km NE of Soledad, California · 13426 days ago · 7 km deep · 60 km away
  19. 3.25 km SW of Gilroy, California · 13426 days ago · 4 km deep · 8 km away
  20. 2.17 km SSW of Gilroy, California · 13426 days ago · 8 km deep · 7 km away
  21. 3.05 km SW of Gilroy, California · 13426 days ago · 4 km deep · 8 km away
  22. 1.65 km SW of Gilroy, California · 13426 days ago · 2 km deep · 9 km away
  23. 1.84 km S of Lexington Hills, California · 13425 days ago · 14 km deep · 37 km away
  24. 2.94 km ESE of Interlaken, California · 13425 days ago · 12 km deep · 5 km away
  25. 1.65 km WNW of Volta, California · 13425 days ago · 0 km deep · 63 km away
  26. 1.93 km SSW of San Juan Bautista, California · 13425 days ago · 7 km deep · 13 km away
  27. 2.05 km SW of Gilroy, California · 13425 days ago · 2 km deep · 9 km away
  28. 1.54 km N of Interlaken, California · 13425 days ago · 11 km deep · 12 km away
  29. 1.813 km N of Livermore, California · 13425 days ago · 11 km deep · 100 km away
  30. 2.43 km NNW of Hollister, California · 13425 days ago · 8 km deep · 21 km away
  31. 1.78 km N of Day Valley, California · 13425 days ago · 3 km deep · 31 km away
  32. 1.93 km ENE of Big Sur, California · 13425 days ago · 13 km deep · 70 km away
  33. 1.524 km NE of Greenfield, California · 13425 days ago · 5 km deep · 71 km away
  34. 2.71 km NNE of Corralitos, California · 13425 days ago · 15 km deep · 17 km away
  35. 2.25 km SSE of San Juan Bautista, California · 13425 days ago · 7 km deep · 16 km away
  36. 2.17 km NNE of Day Valley, California · 13424 days ago · 2 km deep · 26 km away
  37. 1.64 km ESE of Interlaken, California · 13424 days ago · 11 km deep · 5 km away
  38. 2.610 km S of Tres Pinos, California · 13424 days ago · 4 km deep · 38 km away
  39. 1.92 km NE of Lexington Hills, California · 13424 days ago · 5 km deep · 41 km away
  40. 2.67 km ENE of Day Valley, California · 13424 days ago · 8 km deep · 22 km away
  41. 2.37 km ENE of Day Valley, California · 13424 days ago · 8 km deep · 22 km away
  42. 1.78 km N of Day Valley, California · 13424 days ago · 4 km deep · 29 km away
  43. 1.62 km SSW of Hollister, California · 13424 days ago · 7 km deep · 23 km away
  44. 1.52 km SSW of Hollister, California · 13424 days ago · 8 km deep · 23 km away
  45. 1.76 km ENE of Day Valley, California · 13423 days ago · 8 km deep · 22 km away
  46. 1.74 km E of Day Valley, California · 13423 days ago · 6 km deep · 21 km away
  47. 1.76 km S of Tres Pinos, California · 13423 days ago · 9 km deep · 35 km away
  48. 1.96 km SSE of Sunol, California · 13422 days ago · 5 km deep · 73 km away
  49. 1.66 km NE of Interlaken, California · 13422 days ago · 9 km deep · 11 km away
  50. 1.59 km N of Boulder Creek, California · 13422 days ago · 8 km deep · 55 km away
  51. 1.82 km SSW of Saratoga, California · 13422 days ago · 7 km deep · 51 km away
  52. 1.95 km NNE of Interlaken, California · 13422 days ago · 6 km deep · 11 km away
  53. 1.723 km ENE of Soledad, California · 13422 days ago · 7 km deep · 64 km away
  54. 1.61 km NNE of Los Altos Hills, California · 13422 days ago · 3 km deep · 69 km away
  55. 2.023 km ENE of Soledad, California · 13421 days ago · 5 km deep · 68 km away
  56. 2.17 km S of Tres Pinos, California · 13421 days ago · 9 km deep · 36 km away
  57. 1.617 km SSE of Tres Pinos, California · 13421 days ago · 5 km deep · 46 km away
  58. 2.44 km WNW of San Juan Bautista, California · 13421 days ago · 6 km deep · 8 km away
  59. 1.90 km WNW of Los Altos Hills, California · 13421 days ago · 4 km deep · 69 km away
  60. 2.811 km S of Tres Pinos, California · 13421 days ago · 4 km deep · 38 km away

The first 60 of 191.

Before

  1. 1.92 km N of Interlaken, California · 13429 days ago · 13 km deep · 11 km away
  2. 1.62 km N of Soquel, California · 13429 days ago · 3 km deep · 29 km away
  3. 1.522 km NE of Soledad, California · 13429 days ago · 4 km deep · 58 km away
  4. 1.911 km NNE of Morgan Hill, California · 13429 days ago · 5 km deep · 37 km away
  5. 1.96 km SW of Monte Sereno, California · 13429 days ago · 13 km deep · 48 km away
  6. 1.818 km SSE of Tres Pinos, California · 13429 days ago · 7 km deep · 47 km away
  7. 1.715 km SSE of Tres Pinos, California · 13429 days ago · 5 km deep · 44 km away
  8. 1.821 km NE of Soledad, California · 13429 days ago · 4 km deep · 60 km away
  9. 2.015 km SSE of Tres Pinos, California · 13429 days ago · 5 km deep · 44 km away
  10. 3.02 km NNE of Lexington Hills, California · 13430 days ago · 4 km deep · 42 km away
  11. 3.56 km SW of Monte Sereno, California · 13430 days ago · 15 km deep · 48 km away
  12. 1.64 km E of Interlaken, California · 13430 days ago · 9 km deep · 6 km away
  13. 1.60 km SSW of Stanford, California · 13430 days ago · 1 km deep · 73 km away
  14. 3.56 km SW of Monte Sereno, California · 13430 days ago · 14 km deep · 48 km away
  15. 2.14 km NE of Soquel, California · 13430 days ago · 3 km deep · 28 km away
  16. 1.925 km ENE of Greenfield, California · 13431 days ago · 2 km deep · 78 km away
  17. 1.62 km WSW of San Juan Bautista, California · 13431 days ago · 4 km deep · 11 km away
  18. 1.55 km SW of Gilroy, California · 13431 days ago · 2 km deep · 9 km away
  19. 1.624 km ENE of Greenfield, California · 13431 days ago · 5 km deep · 77 km away
  20. 2.517 km SSE of Tres Pinos, California · 13431 days ago · 5 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc149694. Read Sun, Oct 4, 2026, 4:42 AM UTC.