California earthquakes

M2.1 earthquake 11 km SW of Ridgemark, California

A magnitude 2.1 earthquake struck 11 km SW of Ridgemark, California on Wed, Nov 1, 1989, 1:40 PM PST (21:40 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M4.7 6 km NE of Day Valley, 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1989-11-01 21:40:50 UTC
Depth
15.1 km (9.4 mi), shallow
Epicenter
36.745° N, 121.468° 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
46°
Stations used
54

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 197 in the 60 days after this one and 192 in the 30 days before it.

After

  1. 2.17 km NW of Day Valley, California · 13484 days ago · 13 km deep · 55 km away
  2. 1.93 km ESE of Day Valley, California · 13484 days ago · 16 km deep · 44 km away
  3. 1.71 km E of Aromas, California · 13484 days ago · 8 km deep · 21 km away
  4. 1.66 km NE of Ridgemark, California · 13484 days ago · 4 km deep · 19 km away
  5. 2.10 km WSW of Lexington Hills, California · 13483 days ago · 6 km deep · 65 km away
  6. 1.82 km N of Interlaken, California · 13483 days ago · 14 km deep · 34 km away
  7. 2.66 km ENE of Day Valley, California · 13483 days ago · 9 km deep · 47 km away
  8. 4.76 km NE of Day Valley, California · 13483 days ago · 9 km deep · 47 km away
  9. 1.66 km NE of Day Valley, California · 13483 days ago · 7 km deep · 48 km away
  10. 1.96 km ENE of Day Valley, California · 13483 days ago · 8 km deep · 46 km away
  11. 1.67 km ENE of Day Valley, California · 13483 days ago · 9 km deep · 46 km away
  12. 1.66 km ENE of Day Valley, California · 13483 days ago · 8 km deep · 46 km away
  13. 1.97 km ENE of Day Valley, California · 13483 days ago · 8 km deep · 46 km away
  14. 2.16 km NE of Day Valley, California · 13483 days ago · 8 km deep · 47 km away
  15. 1.67 km ENE of Day Valley, California · 13483 days ago · 7 km deep · 46 km away
  16. 2.37 km NE of Ridgemark, California · 13483 days ago · 6 km deep · 19 km away
  17. 1.64 km WSW of Cupertino, California · 13483 days ago · 4 km deep · 83 km away
  18. 2.56 km NW of Day Valley, California · 13483 days ago · 15 km deep · 54 km away
  19. 1.89 km N of Day Valley, California · 13483 days ago · 3 km deep · 56 km away
  20. 1.52 km N of Aromas, California · 13483 days ago · 6 km deep · 24 km away
  21. 1.91 km SSE of Lexington Hills, California · 13483 days ago · 9 km deep · 63 km away
  22. 2.27 km SW of Gilroy, California · 13483 days ago · 4 km deep · 28 km away
  23. 1.73 km SSW of Lexington Hills, California · 13483 days ago · 14 km deep · 63 km away
  24. 2.00 km ESE of Zayante, California · 13483 days ago · 8 km deep · 64 km away
  25. 1.92 km SSW of Lexington Hills, California · 13483 days ago · 13 km deep · 64 km away
  26. 2.06 km ENE of Interlaken, California · 13483 days ago · 0 km deep · 31 km away
  27. 1.83 km WNW of Lexington Hills, California · 13483 days ago · 11 km deep · 68 km away
  28. 2.36 km SSW of Sunol, California · 13483 days ago · 6 km deep · 96 km away
  29. 2.23 km W of San Juan Bautista, California · 13483 days ago · 6 km deep · 15 km away
  30. 1.96 km SSW of Sunol, California · 13483 days ago · 6 km deep · 96 km away
  31. 2.010 km NNE of East Foothills, California · 13483 days ago · 6 km deep · 86 km away
  32. 1.824 km ENE of Soledad, California · 13483 days ago · 2 km deep · 45 km away
  33. 1.76 km ESE of East Foothills, California · 13483 days ago · 0 km deep · 72 km away
  34. 2.56 km ESE of East Foothills, California · 13483 days ago · 1 km deep · 72 km away
  35. 2.02 km WSW of Lexington Hills, California · 13483 days ago · 10 km deep · 65 km away
  36. 1.522 km NE of Soledad, California · 13483 days ago · 4 km deep · 34 km away
  37. 1.75 km S of Gilroy, California · 13482 days ago · 3 km deep · 26 km away
  38. 1.63 km SW of Cupertino, California · 13482 days ago · 5 km deep · 81 km away
  39. 1.74 km SW of Cupertino, California · 13482 days ago · 5 km deep · 81 km away
  40. 1.911 km SSE of Tres Pinos, California · 13482 days ago · 4 km deep · 18 km away
  41. 1.65 km ESE of Interlaken, California · 13482 days ago · 11 km deep · 28 km away
  42. 3.25 km ESE of Interlaken, California · 13482 days ago · 12 km deep · 28 km away
  43. 1.64 km E of Interlaken, California · 13482 days ago · 10 km deep · 29 km away
  44. 1.50 km ESE of Zayante, California · 13482 days ago · 8 km deep · 63 km away
  45. 2.04 km SSW of Lexington Hills, California · 13482 days ago · 15 km deep · 63 km away
  46. 2.13 km SSW of Lexington Hills, California · 13482 days ago · 14 km deep · 63 km away
  47. 1.77 km SE of Lexington Hills, California · 13482 days ago · 9 km deep · 57 km away
  48. 1.82 km NE of Lexington Hills, California · 13482 days ago · 4 km deep · 65 km away
  49. 1.67 km ENE of Interlaken, California · 13482 days ago · 2 km deep · 32 km away
  50. 2.923 km ENE of Soledad, California · 13482 days ago · -1 km deep · 42 km away
  51. 1.67 km ENE of Scotts Valley, California · 13482 days ago · 15 km deep · 56 km away
  52. 2.423 km ENE of Soledad, California · 13482 days ago · 1 km deep · 42 km away
  53. 1.523 km ENE of Soledad, California · 13482 days ago · 1 km deep · 42 km away
  54. 1.85 km E of Interlaken, California · 13482 days ago · 10 km deep · 30 km away
  55. 1.823 km ENE of Soledad, California · 13482 days ago · 1 km deep · 42 km away
  56. 1.62 km NW of San Juan Bautista, California · 13482 days ago · 3 km deep · 16 km away
  57. 1.52 km NNW of Corralitos, California · 13482 days ago · 13 km deep · 43 km away
  58. 1.68 km NNW of Day Valley, California · 13482 days ago · 7 km deep · 55 km away
  59. 1.83 km ENE of Day Valley, California · 13482 days ago · 11 km deep · 47 km away
  60. 2.10 km ESE of Lompico, California · 13482 days ago · 11 km deep · 65 km away

The first 60 of 197.

Before

  1. 1.75 km W of Hollister, California · 13484 days ago · 4 km deep · 13 km away
  2. 2.26 km NE of Ridgemark, California · 13484 days ago · 4 km deep · 19 km away
  3. 1.914 km E of Seven Trees, California · 13484 days ago · 6 km deep · 66 km away
  4. 2.18 km NNE of Day Valley, California · 13484 days ago · 4 km deep · 51 km away
  5. 1.724 km NE of Greenfield, California · 13484 days ago · 6 km deep · 50 km away
  6. 1.94 km N of Interlaken, California · 13484 days ago · 12 km deep · 36 km away
  7. 2.12 km SSW of San Juan Bautista, California · 13484 days ago · 5 km deep · 11 km away
  8. 1.79 km NNE of Day Valley, California · 13484 days ago · 4 km deep · 52 km away
  9. 1.91 km ENE of San Juan Bautista, California · 13484 days ago · 6 km deep · 13 km away
  10. 2.18 km NNE of Day Valley, California · 13484 days ago · 4 km deep · 52 km away
  11. 3.68 km NNE of Day Valley, California · 13484 days ago · 4 km deep · 52 km away
  12. 1.67 km N of Day Valley, California · 13484 days ago · 2 km deep · 53 km away
  13. 2.44 km ENE of Day Valley, California · 13484 days ago · 4 km deep · 46 km away
  14. 1.82 km WNW of Lexington Hills, California · 13484 days ago · 10 km deep · 67 km away
  15. 2.58 km NNE of Day Valley, California · 13484 days ago · 4 km deep · 52 km away
  16. 1.87 km W of Gilroy, California · 13484 days ago · 2 km deep · 33 km away
  17. 2.5Northern California · 13484 days ago · 3 km deep · 46 km away
  18. 1.5Northern California · 13484 days ago · 6 km deep · 59 km away
  19. 2.614 km N of Morgan Hill, California · 13485 days ago · 7 km deep · 59 km away
  20. 1.65 km ENE of Day Valley, California · 13485 days ago · 5 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc150853. Read Fri, Oct 2, 2026, 3:48 PM UTC.