California earthquakes

M1.6 earthquake Central California

A magnitude 1.6 earthquake struck in Central California on Tue, Aug 21, 1990, 11:33 AM PDT (18:33 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.4 14 km S of Tres Pinos, 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-08-21 18:33:59 UTC
Depth
10.3 km (6.4 mi), shallow
Epicenter
36.180° N, 121.002° 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 0.3 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
84°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 193 in the 60 days after this one and 96 in the 30 days before it.

After

  1. 1.612 km NW of Avenal, California · 13192 days ago · 16 km deep · 72 km away
  2. 1.54 km WSW of Ridgemark, California · 13191 days ago · 5 km deep · 78 km away
  3. 1.95 km WNW of San Juan Bautista, California · 13191 days ago · 7 km deep · 92 km away
  4. 2.820km SSE of King City, CA · 13191 days ago · 5 km deep · 16 km away
  5. 1.924 km ENE of Greenfield, California · 13191 days ago · 5 km deep · 29 km away
  6. 1.917 km SSE of Tres Pinos, California · 13190 days ago · 5 km deep · 56 km away
  7. 1.731 km SSW of Los Banos, California · 13189 days ago · 1 km deep · 68 km away
  8. 3.512 km S of Tres Pinos, CA · 13188 days ago · 5 km deep · 62 km away
  9. 1.615 km NW of Parkfield, California · 13188 days ago · 3 km deep · 44 km away
  10. 3.012 km S of Tres Pinos, California · 13188 days ago · 5 km deep · 62 km away
  11. 2.59 km S of Tres Pinos, California · 13188 days ago · 3 km deep · 65 km away
  12. 2.324 km NE of Soledad, California · 13188 days ago · 1 km deep · 42 km away
  13. 1.51 km ESE of Aromas, California · 13188 days ago · 8 km deep · 96 km away
  14. 2.423 km ENE of Soledad, California · 13188 days ago · 4 km deep · 36 km away
  15. 2.5Central California · 13188 days ago · 2 km deep · 47 km away
  16. 2.12 km SW of Huron, California · 13188 days ago · 7 km deep · 79 km away
  17. 2.01 km ESE of Aromas, California · 13188 days ago · 8 km deep · 96 km away
  18. 2.4Central California · 13187 days ago · 9 km deep · 50 km away
  19. 1.61 km NE of Aromas, California · 13187 days ago · 5 km deep · 98 km away
  20. 2.49 km S of Tres Pinos, California · 13187 days ago · 2 km deep · 65 km away
  21. 3.013 km E of Shandon, California · 13186 days ago · 9 km deep · 90 km away
  22. 2.022 km NE of Soledad, California · 13186 days ago · 8 km deep · 42 km away
  23. 1.56 km N of Tres Pinos, California · 13186 days ago · 6 km deep · 79 km away
  24. 2.511 km S of Tres Pinos, California · 13185 days ago · 4 km deep · 63 km away
  25. 2.22 km SE of San Ardo, California · 13184 days ago · 10 km deep · 22 km away
  26. 1.815 km NW of Parkfield, California · 13184 days ago · 3 km deep · 45 km away
  27. 3.012 km S of Tres Pinos, California · 13184 days ago · 5 km deep · 62 km away
  28. 2.412 km S of Tres Pinos, California · 13184 days ago · 5 km deep · 62 km away
  29. 2.612 km S of Tres Pinos, California · 13182 days ago · 5 km deep · 62 km away
  30. 1.56 km NE of Ridgemark, California · 13182 days ago · 7 km deep · 80 km away
  31. 1.912 km S of Tres Pinos, California · 13182 days ago · 5 km deep · 62 km away
  32. 1.912 km S of Tres Pinos, California · 13182 days ago · 5 km deep · 62 km away
  33. 1.612 km S of Tres Pinos, California · 13182 days ago · 5 km deep · 62 km away
  34. 2.26 km NE of Ridgemark, California · 13182 days ago · 6 km deep · 80 km away
  35. 2.9Central California · 13182 days ago · 9 km deep · 80 km away
  36. 1.719 km NW of Parkfield, California · 13182 days ago · 1 km deep · 42 km away
  37. 3.513 km S of Tres Pinos, California · 13181 days ago · 6 km deep · 60 km away
  38. 2.813 km S of Tres Pinos, California · 13181 days ago · 6 km deep · 61 km away
  39. 1.913 km S of Tres Pinos, California · 13181 days ago · 3 km deep · 61 km away
  40. 3.313 km SSE of Tres Pinos, California · 13180 days ago · 6 km deep · 60 km away
  41. 2.314 km SSE of Tres Pinos, California · 13180 days ago · 5 km deep · 60 km away
  42. 1.714 km SSE of Tres Pinos, California · 13180 days ago · 5 km deep · 60 km away
  43. 1.819 km WSW of Volta, California · 13180 days ago · 1 km deep · 97 km away
  44. 1.713 km S of Tres Pinos, California · 13180 days ago · 5 km deep · 60 km away
  45. 2.314 km SSE of Tres Pinos, California · 13180 days ago · 5 km deep · 59 km away
  46. 1.524 km NE of Greenfield, California · 13180 days ago · 5 km deep · 33 km away
  47. 2.421 km NE of Soledad, California · 13180 days ago · 6 km deep · 44 km away
  48. 2.721 km NE of Soledad, California · 13180 days ago · 6 km deep · 44 km away
  49. 1.79 km SSW of Tres Pinos, California · 13179 days ago · 3 km deep · 66 km away
  50. 1.521 km NNE of Soledad, California · 13179 days ago · 8 km deep · 49 km away
  51. 2.311 km S of Tres Pinos, California · 13178 days ago · 4 km deep · 63 km away
  52. 2.04 km S of San Juan Bautista, California · 13178 days ago · 7 km deep · 84 km away
  53. 1.78 km WSW of Huron, California · 13178 days ago · 3 km deep · 73 km away
  54. 1.62 km SE of San Ardo, California · 13178 days ago · 9 km deep · 22 km away
  55. 2.612 km S of Tres Pinos, California · 13178 days ago · 6 km deep · 61 km away
  56. 2.83 km WSW of San Juan Bautista, California · 13178 days ago · 6 km deep · 89 km away
  57. 2.74 km ESE of Aromas, California · 13177 days ago · 6 km deep · 93 km away
  58. 2.121 km NE of Soledad, California · 13177 days ago · 3 km deep · 45 km away
  59. 2.119 km W of Three Rocks, California · 13177 days ago · 3 km deep · 52 km away
  60. 2.113 km N of Coalinga, California · 13177 days ago · 8 km deep · 59 km away

The first 60 of 193.

Before

  1. 2.7Central California · 13192 days ago · 8 km deep · 42 km away
  2. 1.722 km NE of Soledad, California · 13192 days ago · 8 km deep · 42 km away
  3. 1.812 km SE of Tres Pinos, California · 13193 days ago · 2 km deep · 63 km away
  4. 2.94 km SE of Aromas, California · 13193 days ago · 7 km deep · 93 km away
  5. 1.922 km NE of Soledad, California · 13193 days ago · 2 km deep · 41 km away
  6. 2.313 km SW of Huron, California · 13193 days ago · 3 km deep · 71 km away
  7. 3.11 km ESE of Aromas, California · 13193 days ago · 9 km deep · 96 km away
  8. 1.55 km WNW of San Juan Bautista, California · 13194 days ago · 6 km deep · 92 km away
  9. 2.022 km NE of Soledad, California · 13194 days ago · 8 km deep · 42 km away
  10. 1.522 km NE of Soledad, California · 13194 days ago · 8 km deep · 42 km away
  11. 2.022 km NE of Soledad, California · 13194 days ago · 8 km deep · 42 km away
  12. 1.810 km NW of Kettleman City, California · 13195 days ago · 8 km deep · 88 km away
  13. 1.630 km NE of Soledad, California · 13195 days ago · 8 km deep · 45 km away
  14. 2.24 km NE of Tres Pinos, California · 13195 days ago · 8 km deep · 76 km away
  15. 2.812 km NE of Coalinga, California · 13196 days ago · 3 km deep · 66 km away
  16. 1.922 km NE of Soledad, California · 13197 days ago · 8 km deep · 42 km away
  17. 1.921 km W of Three Rocks, California · 13197 days ago · 9 km deep · 50 km away
  18. 2.010 km W of Cayucos, California · 13198 days ago · 6 km deep · 83 km away
  19. 2.011 km NNW of Coalinga, California · 13199 days ago · 9 km deep · 52 km away
  20. 1.74 km WNW of Parkfield, California · 13201 days ago · 5 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc163010. Read Sun, Oct 4, 2026, 12:13 AM UTC.