California earthquakes

M1.8 earthquake Central California

A magnitude 1.8 earthquake struck in Central California on Mon, Oct 26, 1987, 1:06 AM PST (09:06 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M2.2 15 km N of Morgan Hill, CA. 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), micro
Local time
UTC
1987-10-26 09:06:31 UTC
Depth
9.3 km (5.8 mi), shallow
Epicenter
36.702° N, 121.171° 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
±0.19
Depth from
From location
Station coverage gap
85°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 175 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 1.636 km ESE of Tres Pinos, California · 14211 days ago · 0 km deep · 21 km away
  2. 1.66 km N of East Foothills, California · 14211 days ago · 1 km deep · 99 km away
  3. 2.215 km N of Morgan Hill, CA · 14211 days ago · 3 km deep · 75 km away
  4. 1.85 km SE of Tres Pinos, California · 14211 days ago · 9 km deep · 11 km away
  5. 1.55 km SW of Gilroy, California · 14210 days ago · 3 km deep · 49 km away
  6. 2.015 km N of Coalinga, California · 14210 days ago · 14 km deep · 84 km away
  7. 3.210 km S of Tres Pinos, California · 14210 days ago · 3 km deep · 13 km away
  8. 2.021 km S of Big Sur, California · 14210 days ago · 17 km deep · 91 km away
  9. 1.726 km ENE of Soledad, California · 14209 days ago · 7 km deep · 18 km away
  10. 2.122 km WSW of Greenfield, California · 14209 days ago · 13 km deep · 60 km away
  11. 2.02 km SSE of Alum Rock, California · 14209 days ago · 7 km deep · 92 km away
  12. 3.322 km NNE of Soledad, California · 14209 days ago · 9 km deep · 12 km away
  13. 1.522 km NNE of Soledad, California · 14209 days ago · 8 km deep · 12 km away
  14. 2.411 km NE of Coalinga, California · 14209 days ago · 11 km deep · 95 km away
  15. 2.511 km ESE of East Foothills, California · 14207 days ago · 8 km deep · 85 km away
  16. 1.822 km NE of Soledad, California · 14206 days ago · 4 km deep · 13 km away
  17. 1.526 km NE of Greenfield, California · 14206 days ago · 7 km deep · 30 km away
  18. 1.618 km SSE of Tres Pinos, California · 14206 days ago · 8 km deep · 9 km away
  19. 1.816 km NW of Huron, California · 14205 days ago · 5 km deep · 95 km away
  20. 3.215 km E of Seven Trees, California · 14205 days ago · 6 km deep · 79 km away
  21. 1.615 km E of Seven Trees, California · 14205 days ago · 5 km deep · 79 km away
  22. 1.615 km E of Seven Trees, California · 14205 days ago · 5 km deep · 79 km away
  23. 1.61 km NNW of Cambrian Park, California · 14205 days ago · 4 km deep · 93 km away
  24. 2.06 km ENE of Hollister, California · 14204 days ago · 7 km deep · 25 km away
  25. 3.14 km SW of Tres Pinos, California · 14204 days ago · 7 km deep · 19 km away
  26. 1.811 km S of Tres Pinos, California · 14204 days ago · 3 km deep · 13 km away
  27. 1.62 km NNW of Hollister, California · 14204 days ago · 7 km deep · 29 km away
  28. 2.610 km W of Three Rocks, California · 14203 days ago · 12 km deep · 63 km away
  29. 1.65 km SSW of Gilroy, California · 14202 days ago · 4 km deep · 47 km away
  30. 1.621 km NNE of Soledad, California · 14202 days ago · 8 km deep · 12 km away
  31. 2.86 km ENE of Hollister, California · 14202 days ago · 8 km deep · 25 km away
  32. 1.611 km SW of Soledad, California · 14201 days ago · 12 km deep · 45 km away
  33. 1.56 km ENE of Hollister, California · 14201 days ago · 7 km deep · 25 km away
  34. 1.510 km ESE of Gilroy, California · 14200 days ago · 4 km deep · 39 km away
  35. 2.713 km ENE of East Foothills, California · 14200 days ago · 4 km deep · 91 km away
  36. 2.112 km NNE of East Foothills, California · 14200 days ago · 7 km deep · 100 km away
  37. 4.021 km NNE of Soledad, California · 14200 days ago · 9 km deep · 12 km away
  38. 1.921 km NNE of Soledad, California · 14200 days ago · 7 km deep · 12 km away
  39. 2.421 km NNE of Soledad, California · 14200 days ago · 7 km deep · 13 km away
  40. 1.85 km SE of Tres Pinos, California · 14199 days ago · 7 km deep · 11 km away
  41. 1.512 km N of Coalinga, California · 14199 days ago · 9 km deep · 88 km away
  42. 2.421 km NNE of Soledad, California · 14199 days ago · 7 km deep · 13 km away
  43. 1.85 km NNE of Tres Pinos, California · 14199 days ago · 4 km deep · 19 km away
  44. 1.82 km ESE of San Ardo, California · 14198 days ago · 13 km deep · 82 km away
  45. 2.06 km E of East Foothills, California · 14198 days ago · 6 km deep · 92 km away
  46. 1.69 km NNE of Lockwood, California · 14197 days ago · 11 km deep · 77 km away
  47. 1.67 km NNE of East Foothills, California · 14197 days ago · 7 km deep · 100 km away
  48. 2.16 km NE of East Foothills, California · 14197 days ago · 7 km deep · 95 km away
  49. 1.96 km ENE of Hollister, California · 14195 days ago · 5 km deep · 25 km away
  50. 1.521 km NE of Soledad, California · 14195 days ago · 8 km deep · 18 km away
  51. 1.56 km NE of Ridgemark, California · 14195 days ago · 4 km deep · 21 km away
  52. 2.521 km NNE of Soledad, California · 14194 days ago · 8 km deep · 12 km away
  53. 1.98 km NE of Ridgemark, California · 14193 days ago · 6 km deep · 23 km away
  54. 1.614 km E of Seven Trees, California · 14193 days ago · 2 km deep · 80 km away
  55. 1.61 km ESE of San Ardo, California · 14192 days ago · 10 km deep · 81 km away
  56. 2.811 km SW of Soledad, California · 14191 days ago · 13 km deep · 46 km away
  57. 1.811 km SW of Soledad, California · 14191 days ago · 13 km deep · 45 km away
  58. 2.56 km ENE of Hollister, California · 14191 days ago · 7 km deep · 25 km away
  59. 1.56 km ENE of Hollister, California · 14191 days ago · 7 km deep · 25 km away
  60. 2.641 km ENE of Soledad, California · 14191 days ago · 5 km deep · 26 km away

The first 60 of 175.

Before

  1. 1.68 km SE of Los Banos, California · 14212 days ago · 4 km deep · 48 km away
  2. 1.65 km SW of Gilroy, California · 14213 days ago · 4 km deep · 50 km away
  3. 1.811 km NE of Coalinga, California · 14214 days ago · 9 km deep · 96 km away
  4. 2.018 km NE of East Foothills, California · 14215 days ago · 5 km deep · 100 km away
  5. 1.614 km E of Seven Trees, California · 14215 days ago · 2 km deep · 79 km away
  6. 1.67 km W of Gilroy, California · 14215 days ago · 6 km deep · 54 km away
  7. 2.17 km S of Three Rocks, California · 14216 days ago · 9 km deep · 76 km away
  8. 1.65 km SE of Tres Pinos, California · 14216 days ago · 7 km deep · 11 km away
  9. 2.02 km SE of San Ardo, California · 14217 days ago · 10 km deep · 82 km away
  10. 2.319 km WSW of Three Rocks, California · 14218 days ago · 16 km deep · 59 km away
  11. 1.521 km SSE of Tres Pinos, California · 14219 days ago · 6 km deep · 11 km away
  12. 1.621 km SSE of Tres Pinos, California · 14219 days ago · 6 km deep · 11 km away
  13. 1.621 km NE of Soledad, California · 14220 days ago · 8 km deep · 18 km away
  14. 2.821 km NE of Soledad, California · 14220 days ago · 9 km deep · 18 km away
  15. 1.79 km E of San Martin, California · 14220 days ago · 9 km deep · 53 km away
  16. 2.116 km NNW of Coalinga, California · 14221 days ago · 11 km deep · 81 km away
  17. 2.04 km SE of Aromas, California · 14221 days ago · 7 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc107635. Read Wed, Sep 23, 2026, 4:23 AM UTC.