California earthquakes

M1.5 earthquake 18 km SW of Gustine, California

A magnitude 1.5 earthquake struck 18 km SW of Gustine, California on Thu, Aug 27, 1987, 6:36 AM PDT (13:36 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M4.4 12 km N of Livermore, California. This one was a foreshock.

Gustine 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
1987-08-27 13:36:13 UTC
Depth
-0.4 km (-0.2 mi), shallow
Epicenter
37.148° N, 121.161° 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 2.0 km horizontally, 7.8 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
177°
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 104 in the 60 days after this one and 54 in the 30 days before it.

After

  1. 1.92 km W of Taft Mosswood, California · 14273 days ago · 4 km deep · 86 km away
  2. 2.510 km ENE of East Foothills, California · 14272 days ago · 8 km deep · 57 km away
  3. 2.04 km S of San Juan Bautista, California · 14271 days ago · 7 km deep · 50 km away
  4. 1.94 km S of San Juan Bautista, California · 14271 days ago · 7 km deep · 50 km away
  5. 1.512 km ENE of East Foothills, California · 14270 days ago · 8 km deep · 57 km away
  6. 1.513 km N of Morgan Hill, California · 14270 days ago · 5 km deep · 44 km away
  7. 1.513 km ESE of Alum Rock, California · 14269 days ago · 2 km deep · 51 km away
  8. 2.117 km NE of East Foothills, California · 14269 days ago · 7 km deep · 61 km away
  9. 2.032 km WNW of Three Rocks, California · 14269 days ago · 7 km deep · 71 km away
  10. 1.81 km NW of Three Rocks, California · 14268 days ago · 5 km deep · 98 km away
  11. 1.67 km NE of Hollister, California · 14268 days ago · 6 km deep · 32 km away
  12. 2.218 km SSE of Tres Pinos, California · 14267 days ago · 6 km deep · 57 km away
  13. 1.823 km NNE of San Lucas, California · 14267 days ago · 6 km deep · 96 km away
  14. 2.618 km NE of East Foothills, California · 14267 days ago · 5 km deep · 60 km away
  15. 1.815 km E of Seven Trees, California · 14265 days ago · 3 km deep · 48 km away
  16. 2.78 km ESE of East Foothills, California · 14265 days ago · 8 km deep · 55 km away
  17. 1.517 km NE of East Foothills, California · 14265 days ago · 7 km deep · 61 km away
  18. 2.017 km SSE of Tres Pinos, California · 14265 days ago · 4 km deep · 57 km away
  19. 1.63 km SSW of Hollister, California · 14262 days ago · 6 km deep · 43 km away
  20. 2.51 km ENE of Tres Pinos, California · 14261 days ago · 9 km deep · 41 km away
  21. 1.823 km SE of Tres Pinos, California · 14260 days ago · 7 km deep · 59 km away
  22. 2.116 km SE of Tres Pinos, California · 14260 days ago · 7 km deep · 49 km away
  23. 1.524 km NE of Greenfield, California · 14260 days ago · 5 km deep · 75 km away
  24. 2.12 km W of Cambrian Park, California · 14259 days ago · 8 km deep · 72 km away
  25. 2.27 km NE of Ridgemark, California · 14259 days ago · 4 km deep · 34 km away
  26. 1.818 km SSE of Tres Pinos, California · 14258 days ago · 6 km deep · 58 km away
  27. 2.26 km SSW of Ridgemark, California · 14258 days ago · 9 km deep · 48 km away
  28. 1.77 km NE of Ridgemark, California · 14257 days ago · 4 km deep · 35 km away
  29. 3.316 km E of Seven Trees, California · 14257 days ago · 6 km deep · 46 km away
  30. 1.817 km SSE of Tres Pinos, California · 14257 days ago · 5 km deep · 57 km away
  31. 2.312 km N of Morgan Hill, California · 14256 days ago · 3 km deep · 43 km away
  32. 2.921 km NE of Soledad, California · 14255 days ago · 2 km deep · 63 km away
  33. 2.59 km E of Gilroy, California · 14255 days ago · 10 km deep · 32 km away
  34. 2.315 km SSE of Livermore, California · 14254 days ago · 3 km deep · 65 km away
  35. 1.615 km SE of Tres Pinos, California · 14253 days ago · 10 km deep · 49 km away
  36. 1.55 km NE of Tres Pinos, California · 14252 days ago · 8 km deep · 37 km away
  37. 1.521 km SSW of Los Banos, California · 14252 days ago · 3 km deep · 35 km away
  38. 1.621 km SSW of Los Banos, California · 14252 days ago · 3 km deep · 35 km away
  39. 2.522 km SSW of Los Banos, California · 14252 days ago · 0 km deep · 34 km away
  40. 1.620 km SSE of Tres Pinos, California · 14250 days ago · 4 km deep · 59 km away
  41. 1.53 km WNW of San Juan Bautista, California · 14250 days ago · 4 km deep · 49 km away
  42. 1.627 km SE of Tres Pinos, California · 14249 days ago · 8 km deep · 60 km away
  43. 1.613 km SSE of Tres Pinos, California · 14249 days ago · 3 km deep · 55 km away
  44. 2.56 km ENE of Hollister, California · 14249 days ago · 8 km deep · 34 km away
  45. 2.27 km N of East Foothills, California · 14249 days ago · 7 km deep · 66 km away
  46. 1.77 km S of Tres Pinos, California · 14248 days ago · 7 km deep · 49 km away
  47. 1.88 km ENE of Morgan Hill, California · 14248 days ago · 2 km deep · 35 km away
  48. 1.919 km NE of East Foothills, California · 14248 days ago · 6 km deep · 62 km away
  49. 2.222 km NNE of Soledad, California · 14246 days ago · 9 km deep · 60 km away
  50. 3.02 km SSW of Lexington Hills, California · 14243 days ago · 16 km deep · 73 km away
  51. 1.622 km NNE of Soledad, California · 14242 days ago · 6 km deep · 61 km away
  52. 2.08 km S of Davenport, California · 14241 days ago · 6 km deep · 95 km away
  53. 2.06 km ENE of Hollister, California · 14241 days ago · 7 km deep · 33 km away
  54. 1.510 km ENE of Blackhawk, California · 14241 days ago · 10 km deep · 97 km away
  55. 2.018 km NE of East Foothills, California · 14240 days ago · 6 km deep · 61 km away
  56. 2.612 km NE of East Foothills, California · 14239 days ago · 7 km deep · 63 km away
  57. 1.712 km NE of East Foothills, California · 14239 days ago · 7 km deep · 63 km away
  58. 1.86 km ENE of Hollister, California · 14237 days ago · 6 km deep · 35 km away
  59. 1.66 km SE of Tres Pinos, California · 14237 days ago · 5 km deep · 45 km away
  60. 1.823 km NE of King City, California · 14237 days ago · 7 km deep · 92 km away

The first 60 of 104.

Before

  1. 1.912 km S of Tres Pinos, California · 14274 days ago · 3 km deep · 54 km away
  2. 1.62 km SW of Ridgemark, California · 14274 days ago · 8 km deep · 44 km away
  3. 3.818 km SW of Gustine, California · 14274 days ago · 0 km deep · 1 km away
  4. 1.79 km SW of Brentwood, California · 14275 days ago · 18 km deep · 95 km away
  5. 2.817 km SSE of Livermore, California · 14277 days ago · 1 km deep · 63 km away
  6. 2.022 km NNE of Soledad, California · 14277 days ago · 8 km deep · 61 km away
  7. 1.824 km NE of Greenfield, California · 14277 days ago · 6 km deep · 75 km away
  8. 1.64 km E of Sunol, California · 14277 days ago · 7 km deep · 77 km away
  9. 1.65 km ENE of Hollister, California · 14278 days ago · 5 km deep · 34 km away
  10. 1.917 km NE of East Foothills, California · 14278 days ago · 6 km deep · 61 km away
  11. 1.915 km N of Morgan Hill, California · 14279 days ago · 4 km deep · 46 km away
  12. 1.53 km WSW of Hollister, California · 14279 days ago · 9 km deep · 42 km away
  13. 2.021 km NE of Soledad, California · 14280 days ago · 2 km deep · 65 km away
  14. 2.118 km NE of East Foothills, California · 14280 days ago · 6 km deep · 61 km away
  15. 1.623 km NE of Soledad, California · 14282 days ago · 4 km deep · 65 km away
  16. 1.824 km NE of Greenfield, California · 14282 days ago · 1 km deep · 76 km away
  17. 2.923 km NE of Soledad, California · 14283 days ago · 5 km deep · 64 km away
  18. 1.917 km WSW of Soledad, California · 14284 days ago · 9 km deep · 95 km away
  19. 2.021 km NE of Soledad, California · 14284 days ago · 5 km deep · 64 km away
  20. 2.221 km NE of Soledad, California · 14284 days ago · 5 km deep · 64 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1152264. Read Thu, Sep 24, 2026, 4:09 PM UTC.