California earthquakes

M2.2 earthquake 2 km WSW of Ridgemark, California

A magnitude 2.2 earthquake struck 2 km WSW of Ridgemark, California on Thu, Aug 16, 1979, 3:16 PM PDT (22:16 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.4 3 km S of San Juan Bautista, California. This one was a foreshock.

Ridgemark 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
2.2 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1979-08-16 22:16:38 UTC
Depth
5.9 km (3.6 mi), shallow
Epicenter
36.802° N, 121.389° 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
±0.14
Depth from
From location
Station coverage gap
40°
Stations used
42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 179 in the 60 days after this one and 189 in the 30 days before it.

After

  1. 1.711 km ESE of Gilroy, California · 17213 days ago · 5 km deep · 18 km away
  2. 2.48 km E of Gilroy, California · 17213 days ago · 3 km deep · 23 km away
  3. 2.29 km ESE of Gilroy, California · 17213 days ago · 5 km deep · 21 km away
  4. 2.41 km ENE of Gilroy, California · 17212 days ago · 4 km deep · 27 km away
  5. 1.828 km ENE of Soledad, California · 17212 days ago · 9 km deep · 40 km away
  6. 2.39 km ESE of Gilroy, California · 17212 days ago · 5 km deep · 21 km away
  7. 2.622 km NNE of Soledad, California · 17211 days ago · 2 km deep · 27 km away
  8. 1.58 km NNE of Chualar, California · 17211 days ago · 8 km deep · 20 km away
  9. 2.14 km N of Gilroy, California · 17211 days ago · 4 km deep · 32 km away
  10. 2.08 km ENE of Gilroy, CA · 17211 days ago · 4 km deep · 26 km away
  11. 1.88 km E of Gilroy, California · 17211 days ago · 2 km deep · 22 km away
  12. 2.51 km SSE of Gilroy, California · 17210 days ago · 5 km deep · 27 km away
  13. 2.021 km NE of Soledad, California · 17210 days ago · 6 km deep · 30 km away
  14. 2.19 km ENE of Gilroy, California · 17209 days ago · 8 km deep · 26 km away
  15. 2.023 km NE of San Ardo, California · 17209 days ago · 8 km deep · 89 km away
  16. 1.75 km SW of Gilroy, California · 17209 days ago · 5 km deep · 26 km away
  17. 1.611 km E of Gilroy, California · 17208 days ago · 8 km deep · 22 km away
  18. 1.78 km ENE of Gilroy, California · 17208 days ago · 4 km deep · 26 km away
  19. 1.86 km SSE of San Juan Bautista, California · 17208 days ago · 6 km deep · 10 km away
  20. 3.117 km SSE of Tres Pinos, California · 17207 days ago · 10 km deep · 22 km away
  21. 1.615 km W of Westley, California · 17207 days ago · 3 km deep · 83 km away
  22. 1.91 km NE of Gonzales, California · 17207 days ago · 21 km deep · 32 km away
  23. 1.63 km S of San Juan Bautista, California · 17207 days ago · 6 km deep · 13 km away
  24. 1.76 km WSW of Gilroy, California · 17206 days ago · 5 km deep · 30 km away
  25. 1.66 km WSW of Gilroy, California · 17206 days ago · 4 km deep · 30 km away
  26. 1.68 km ENE of Gilroy, California · 17206 days ago · 6 km deep · 29 km away
  27. 2.37 km E of Gilroy, California · 17206 days ago · 2 km deep · 24 km away
  28. 1.921 km NE of San Ardo, California · 17206 days ago · 6 km deep · 94 km away
  29. 1.98 km E of Gilroy, California · 17206 days ago · 5 km deep · 23 km away
  30. 2.117 km SSE of Tres Pinos, California · 17206 days ago · 5 km deep · 21 km away
  31. 1.810 km NNE of Big Sur, California · 17206 days ago · 5 km deep · 60 km away
  32. 1.96 km WSW of Gilroy, California · 17206 days ago · 4 km deep · 30 km away
  33. 2.214 km E of Seven Trees, California · 17205 days ago · 6 km deep · 61 km away
  34. 2.08 km ENE of Morgan Hill, California · 17205 days ago · 3 km deep · 43 km away
  35. 1.67 km NE of Gilroy, California · 17205 days ago · 4 km deep · 29 km away
  36. 2.224 km NE of Greenfield, California · 17204 days ago · 6 km deep · 48 km away
  37. 1.722 km ENE of Soledad, California · 17203 days ago · 4 km deep · 42 km away
  38. 1.821 km NE of Soledad, California · 17203 days ago · 3 km deep · 36 km away
  39. 2.04 km SSW of Gilroy, California · 17202 days ago · 5 km deep · 25 km away
  40. 2.05 km WSW of Gilroy, California · 17202 days ago · 5 km deep · 29 km away
  41. 1.68 km ENE of Gilroy, California · 17202 days ago · 5 km deep · 29 km away
  42. 1.88 km ENE of Gilroy, California · 17202 days ago · 6 km deep · 28 km away
  43. 1.89 km ESE of Gilroy, California · 17202 days ago · 4 km deep · 21 km away
  44. 2.421 km NE of Soledad, California · 17202 days ago · 5 km deep · 36 km away
  45. 2.321 km NE of Soledad, California · 17202 days ago · 4 km deep · 36 km away
  46. 2.38 km E of San Martin, California · 17202 days ago · 7 km deep · 35 km away
  47. 1.68 km ENE of Gilroy, California · 17202 days ago · 6 km deep · 28 km away
  48. 2.55 km WSW of Gilroy, California · 17201 days ago · 5 km deep · 29 km away
  49. 1.96 km WSW of Gilroy, California · 17201 days ago · 5 km deep · 29 km away
  50. 2.65 km WSW of Gilroy, California · 17201 days ago · 5 km deep · 29 km away
  51. 2.48 km ENE of Gilroy, California · 17201 days ago · 8 km deep · 26 km away
  52. 1.821 km NE of Soledad, California · 17200 days ago · 5 km deep · 35 km away
  53. 1.78 km W of Gilroy, California · 17200 days ago · 4 km deep · 32 km away
  54. 2.04 km N of East Foothills, California · 17199 days ago · 1 km deep · 78 km away
  55. 1.721 km NE of Soledad, California · 17199 days ago · 2 km deep · 33 km away
  56. 1.523 km ENE of San Ardo, California · 17199 days ago · 7 km deep · 100 km away
  57. 1.815 km S of Tracy, California · 17199 days ago · 5 km deep · 89 km away
  58. 1.96 km SSW of Livermore, California · 17199 days ago · 0 km deep · 99 km away
  59. 2.122 km NE of San Lucas, California · 17199 days ago · 6 km deep · 77 km away
  60. 1.822 km ENE of Soledad, California · 17198 days ago · 5 km deep · 42 km away

The first 60 of 179.

Before

  1. 1.716 km SSE of Tres Pinos, California · 17213 days ago · 4 km deep · 20 km away
  2. 2.0Central California · 17213 days ago · 6 km deep · 21 km away
  3. 2.59 km ENE of Morgan Hill, California · 17213 days ago · 5 km deep · 43 km away
  4. 1.68 km ESE of Gilroy, California · 17213 days ago · 5 km deep · 22 km away
  5. 1.58 km ESE of Gilroy, California · 17213 days ago · 5 km deep · 22 km away
  6. 1.716 km SSE of Tres Pinos, California · 17213 days ago · 5 km deep · 20 km away
  7. 1.57 km ENE of Gilroy, California · 17214 days ago · 4 km deep · 26 km away
  8. 1.79 km NE of Gilroy, California · 17214 days ago · 4 km deep · 31 km away
  9. 2.45 km SSE of San Juan Bautista, California · 17214 days ago · 7 km deep · 12 km away
  10. 2.39 km E of Gilroy, California · 17214 days ago · 5 km deep · 23 km away
  11. 2.65 km ESE of Lexington Hills, California · 17214 days ago · 12 km deep · 61 km away
  12. 2.315 km SSE of Tres Pinos, California · 17214 days ago · 4 km deep · 20 km away
  13. 2.716 km SSE of Tres Pinos, California · 17214 days ago · 5 km deep · 20 km away
  14. 1.78 km ENE of Gilroy, California · 17214 days ago · 9 km deep · 26 km away
  15. 1.53 km S of San Juan Bautista, California · 17215 days ago · 6 km deep · 14 km away
  16. 2.834 km WSW of Three Rocks, California · 17215 days ago · 12 km deep · 74 km away
  17. 2.27 km ENE of Gilroy, California · 17215 days ago · 5 km deep · 26 km away
  18. 2.08 km NE of San Martin, California · 17215 days ago · 7 km deep · 39 km away
  19. 1.830 km SE of Tres Pinos, California · 17215 days ago · 10 km deep · 36 km away
  20. 1.78 km ENE of Gilroy, California · 17215 days ago · 5 km deep · 28 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1047270. Read Thu, Oct 1, 2026, 5:15 PM UTC.