California earthquakes

M1.8 earthquake Central California

A magnitude 1.8 earthquake struck in Central California on Tue, Jul 31, 1990, 10:09 PM PDT (05:09 UTC), 4 km (2 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-08-01 05:09:47 UTC
Depth
4.0 km (2.5 mi), shallow
Epicenter
36.670° N, 121.293° 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
±0.16
Depth from
From location
Station coverage gap
69°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 194 in the 60 days after this one and 100 in the 30 days before it.

After

  1. 1.813 km S of Tres Pinos, California · 13213 days ago · 4 km deep · 0 km away
  2. 2.220 km W of Three Rocks, California · 13212 days ago · 7 km deep · 62 km away
  3. 1.75 km SW of Gilroy, California · 13211 days ago · 3 km deep · 43 km away
  4. 2.918 km SSE of Tres Pinos, California · 13211 days ago · 10 km deep · 6 km away
  5. 1.623 km NE of King City, California · 13211 days ago · 8 km deep · 45 km away
  6. 2.18 km SSE of San Juan Bautista, California · 13211 days ago · 8 km deep · 22 km away
  7. 1.92 km WNW of Tres Pinos, California · 13211 days ago · 10 km deep · 15 km away
  8. 2.016 km E of Seven Trees, California · 13211 days ago · 8 km deep · 75 km away
  9. 2.04 km ESE of Aromas, California · 13211 days ago · 5 km deep · 35 km away
  10. 2.27 km NE of Interlaken, California · 13210 days ago · 4 km deep · 48 km away
  11. 4.02 km ESE of Aromas, California · 13209 days ago · 9 km deep · 37 km away
  12. 1.84 km SE of Aromas, California · 13208 days ago · 8 km deep · 35 km away
  13. 1.81 km ESE of Aromas, California · 13208 days ago · 8 km deep · 38 km away
  14. 1.73 km ESE of Aromas, California · 13208 days ago · 7 km deep · 36 km away
  15. 1.53 km ESE of Aromas, California · 13208 days ago · 7 km deep · 36 km away
  16. 2.44 km SE of Aromas, California · 13208 days ago · 7 km deep · 35 km away
  17. 2.52 km N of Aromas, California · 13208 days ago · 5 km deep · 41 km away
  18. 1.74 km ESE of Aromas, California · 13208 days ago · 7 km deep · 35 km away
  19. 1.932 km WSW of Three Rocks, California · 13208 days ago · 13 km deep · 58 km away
  20. 1.91 km ESE of Aromas, California · 13208 days ago · 8 km deep · 38 km away
  21. 1.712 km NNW of Coalinga, California · 13208 days ago · 4 km deep · 91 km away
  22. 1.52 km NNW of Aromas, California · 13207 days ago · 8 km deep · 42 km away
  23. 1.61 km ESE of Aromas, California · 13207 days ago · 8 km deep · 38 km away
  24. 1.65 km W of Volta, California · 13207 days ago · 0 km deep · 55 km away
  25. 2.71 km E of Aromas, California · 13206 days ago · 8 km deep · 38 km away
  26. 2.411 km S of Tres Pinos, California · 13206 days ago · 5 km deep · 2 km away
  27. 3.66 km NE of Ridgemark, California · 13206 days ago · 7 km deep · 21 km away
  28. 2.16 km NE of Ridgemark, California · 13206 days ago · 6 km deep · 20 km away
  29. 2.114 km E of Seven Trees, California · 13204 days ago · 2 km deep · 77 km away
  30. 1.723 km ENE of King City, California · 13204 days ago · 4 km deep · 52 km away
  31. 1.77 km N of Day Valley, California · 13204 days ago · 5 km deep · 70 km away
  32. 1.822 km ENE of Soledad, California · 13204 days ago · 8 km deep · 24 km away
  33. 2.65 km ESE of Aromas, California · 13204 days ago · 6 km deep · 34 km away
  34. 2.221 km NE of Soledad, California · 13204 days ago · 6 km deep · 13 km away
  35. 1.821 km NE of Soledad, California · 13203 days ago · 5 km deep · 15 km away
  36. 2.224 km NE of Greenfield, California · 13203 days ago · 6 km deep · 31 km away
  37. 2.12 km S of San Juan Bautista, California · 13202 days ago · 4 km deep · 27 km away
  38. 2.9Central California · 13202 days ago · 4 km deep · 27 km away
  39. 1.73 km S of San Juan Bautista, California · 13202 days ago · 4 km deep · 27 km away
  40. 2.330 km ESE of Tres Pinos, California · 13202 days ago · 4 km deep · 28 km away
  41. 2.94 km ESE of Interlaken, California · 13201 days ago · 12 km deep · 46 km away
  42. 3.14 km ESE of Interlaken, California · 13201 days ago · 12 km deep · 46 km away
  43. 2.24 km ESE of Interlaken, California · 13201 days ago · 11 km deep · 46 km away
  44. 1.87 km NE of Gilroy, California · 13199 days ago · 3 km deep · 46 km away
  45. 2.63 km ENE of Interlaken, California · 13199 days ago · 8 km deep · 49 km away
  46. 2.011 km NNW of Coalinga, California · 13198 days ago · 9 km deep · 91 km away
  47. 1.921 km W of Three Rocks, California · 13197 days ago · 9 km deep · 62 km away
  48. 1.922 km NE of Soledad, California · 13197 days ago · 8 km deep · 20 km away
  49. 3.715 km E of Seven Trees, California · 13197 days ago · 7 km deep · 77 km away
  50. 2.24 km NE of Tres Pinos, California · 13195 days ago · 8 km deep · 17 km away
  51. 1.630 km NE of Soledad, California · 13195 days ago · 8 km deep · 25 km away
  52. 1.511 km ESE of Alum Rock, California · 13194 days ago · 0 km deep · 81 km away
  53. 2.022 km NE of Soledad, California · 13194 days ago · 8 km deep · 20 km away
  54. 1.522 km NE of Soledad, California · 13194 days ago · 8 km deep · 20 km away
  55. 1.64 km ESE of Interlaken, California · 13194 days ago · 12 km deep · 46 km away
  56. 2.022 km NE of Soledad, California · 13194 days ago · 8 km deep · 20 km away
  57. 1.55 km WNW of San Juan Bautista, California · 13193 days ago · 6 km deep · 34 km away
  58. 3.11 km ESE of Aromas, California · 13193 days ago · 9 km deep · 38 km away
  59. 1.922 km NE of Soledad, California · 13193 days ago · 2 km deep · 21 km away
  60. 2.94 km SE of Aromas, California · 13193 days ago · 7 km deep · 35 km away

The first 60 of 194.

Before

  1. 1.94 km ESE of Interlaken, California · 13213 days ago · 11 km deep · 46 km away
  2. 1.69 km S of Carmel Valley Village, California · 13213 days ago · 7 km deep · 50 km away
  3. 1.514 km E of Seven Trees, California · 13213 days ago · 2 km deep · 77 km away
  4. 1.624 km NE of Soledad, California · 13213 days ago · 11 km deep · 18 km away
  5. 1.9Central California · 13214 days ago · 6 km deep · 60 km away
  6. 1.5Central California · 13214 days ago · 5 km deep · 20 km away
  7. 2.418 km SSE of Tres Pinos, California · 13214 days ago · 10 km deep · 6 km away
  8. 2.12 km E of Aromas, California · 13215 days ago · 7 km deep · 38 km away
  9. 1.622 km NE of San Lucas, California · 13215 days ago · 7 km deep · 59 km away
  10. 1.64 km W of Lexington Hills, California · 13215 days ago · 12 km deep · 85 km away
  11. 1.614 km E of Seven Trees, California · 13215 days ago · 1 km deep · 77 km away
  12. 1.6Central California · 13215 days ago · 5 km deep · 49 km away
  13. 1.64 km ESE of Interlaken, California · 13216 days ago · 11 km deep · 46 km away
  14. 1.711 km S of Tres Pinos, California · 13217 days ago · 4 km deep · 3 km away
  15. 1.911 km S of Tres Pinos, California · 13217 days ago · 3 km deep · 3 km away
  16. 2.023 km NE of San Ardo, California · 13217 days ago · 7 km deep · 71 km away
  17. 2.511 km S of Tres Pinos, California · 13217 days ago · 3 km deep · 3 km away
  18. 1.7Northern California · 13217 days ago · 1 km deep · 87 km away
  19. 1.512 km ESE of Tres Pinos, California · 13218 days ago · 8 km deep · 15 km away
  20. 1.624 km ENE of Soledad, California · 13218 days ago · 2 km deep · 28 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc161888. Read Sat, Oct 3, 2026, 6:28 PM UTC.