California earthquakes

M2.4 earthquake 11 km SW of Ridgemark, California

A magnitude 2.4 earthquake struck 11 km SW of Ridgemark, California on Mon, Dec 18, 1989, 6:04 PM PST (02:04 UTC), 15 km (10 mi) below the surface.

A larger quake followed: M4.3 36 km WSW of Three Rocks, 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.

Open the live map with earthquakes

The earthquake

Magnitude
2.4 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1989-12-19 02:04:37 UTC
Depth
15.3 km (9.5 mi), shallow
Epicenter
36.744° N, 121.467° 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
±0.15
Depth from
From location
Station coverage gap
37°
Stations used
69

Nearest places

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

Nearby

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

After

  1. 2.810 km S of Tres Pinos, California · 13437 days ago · 4 km deep · 14 km away
  2. 2.42 km NNW of Aromas, California · 13437 days ago · 8 km deep · 25 km away
  3. 1.811 km S of Tres Pinos, California · 13437 days ago · 6 km deep · 15 km away
  4. 2.42 km S of Lexington Hills, California · 13437 days ago · 11 km deep · 63 km away
  5. 2.910 km S of Tres Pinos, California · 13437 days ago · 5 km deep · 14 km away
  6. 2.410 km S of Tres Pinos, California · 13437 days ago · 4 km deep · 14 km away
  7. 2.018 km SSE of Tres Pinos, California · 13437 days ago · 9 km deep · 23 km away
  8. 1.924 km W of Lockwood, California · 13437 days ago · 3 km deep · 91 km away
  9. 1.72 km NNE of Lexington Hills, California · 13437 days ago · 4 km deep · 65 km away
  10. 1.86 km NNE of Day Valley, California · 13436 days ago · 4 km deep · 51 km away
  11. 1.65 km NE of East Foothills, California · 13436 days ago · 5 km deep · 79 km away
  12. 1.64 km WNW of San Juan Bautista, California · 13436 days ago · 6 km deep · 16 km away
  13. 1.56 km E of Zayante, California · 13436 days ago · 19 km deep · 60 km away
  14. 2.53 km SE of Los Gatos, California · 13436 days ago · 3 km deep · 66 km away
  15. 1.62 km SSW of Lexington Hills, California · 13436 days ago · 13 km deep · 64 km away
  16. 1.63 km SE of Los Gatos, California · 13436 days ago · 2 km deep · 66 km away
  17. 1.621 km NE of Soledad, California · 13436 days ago · 2 km deep · 34 km away
  18. 1.69 km S of Tres Pinos, California · 13436 days ago · 4 km deep · 13 km away
  19. 1.911 km S of Tres Pinos, California · 13436 days ago · 4 km deep · 15 km away
  20. 3.114 km SSE of Tres Pinos, California · 13436 days ago · 3 km deep · 19 km away
  21. 2.715 km SSE of Tres Pinos, California · 13436 days ago · 3 km deep · 20 km away
  22. 3.08 km ENE of San Martin, California · 13435 days ago · 7 km deep · 41 km away
  23. 2.58 km ENE of San Martin, California · 13435 days ago · 7 km deep · 41 km away
  24. 1.96 km WSW of Monte Sereno, California · 13435 days ago · 13 km deep · 74 km away
  25. 1.822 km NE of Soledad, California · 13435 days ago · 3 km deep · 35 km away
  26. 2.34 km SW of Davenport, California · 13435 days ago · 6 km deep · 73 km away
  27. 1.622 km NE of Soledad, California · 13435 days ago · 4 km deep · 35 km away
  28. 2.22 km SSW of Lexington Hills, California · 13435 days ago · 12 km deep · 64 km away
  29. 1.72 km NE of Los Gatos, California · 13435 days ago · 1 km deep · 70 km away
  30. 1.97 km SE of Lexington Hills, California · 13435 days ago · 3 km deep · 58 km away
  31. 2.110 km S of Tres Pinos, California · 13434 days ago · 4 km deep · 14 km away
  32. 2.622 km NE of Soledad, California · 13434 days ago · 4 km deep · 35 km away
  33. 1.622 km NE of Soledad, California · 13434 days ago · 4 km deep · 35 km away
  34. 1.62 km ENE of Corralitos, California · 13434 days ago · 15 km deep · 39 km away
  35. 1.624 km NE of Soledad, California · 13434 days ago · 10 km deep · 35 km away
  36. 2.710 km S of Tres Pinos, California · 13434 days ago · 5 km deep · 14 km away
  37. 2.313 km S of Tres Pinos, California · 13434 days ago · 3 km deep · 17 km away
  38. 2.76 km WNW of Day Valley, California · 13433 days ago · 18 km deep · 54 km away
  39. 1.66 km WNW of Day Valley, California · 13433 days ago · 18 km deep · 54 km away
  40. 1.98 km SSW of Tres Pinos, California · 13433 days ago · 3 km deep · 10 km away
  41. 4.26 km SW of Three Rocks, California · 13433 days ago · 9 km deep · 97 km away
  42. 1.67 km SE of Lexington Hills, California · 13433 days ago · 6 km deep · 57 km away
  43. 2.06 km WNW of Day Valley, California · 13433 days ago · 18 km deep · 54 km away
  44. 2.40 km ESE of Buena Vista, California · 13433 days ago · 9 km deep · 75 km away
  45. 1.8Central California · 13433 days ago · 8 km deep · 41 km away
  46. 1.831 km ESE of Tres Pinos, California · 13433 days ago · 4 km deep · 42 km away
  47. 2.632 km ESE of Tres Pinos, California · 13433 days ago · 5 km deep · 43 km away
  48. 1.98 km SW of Tres Pinos, California · 13433 days ago · 2 km deep · 7 km away
  49. 1.62 km SSE of Lexington Hills, California · 13433 days ago · 9 km deep · 63 km away
  50. 1.97 km N of Day Valley, California · 13432 days ago · 4 km deep · 52 km away
  51. 1.937 km SSW of South Dos Palos, California · 13432 days ago · 6 km deep · 55 km away
  52. 1.625 km SE of Tres Pinos, California · 13432 days ago · 5 km deep · 33 km away
  53. 1.53 km N of Interlaken, California · 13432 days ago · 15 km deep · 36 km away
  54. 2.311 km WSW of Saratoga, California · 13431 days ago · 10 km deep · 81 km away
  55. 1.525 km SE of Tres Pinos, California · 13431 days ago · 5 km deep · 34 km away
  56. 1.925 km ENE of Greenfield, California · 13431 days ago · 0 km deep · 54 km away
  57. 2.217 km SSE of Tres Pinos, California · 13431 days ago · 5 km deep · 22 km away
  58. 2.22 km SSW of San Juan Bautista, California · 13431 days ago · 5 km deep · 12 km away
  59. 2.517 km SSE of Tres Pinos, California · 13431 days ago · 5 km deep · 22 km away
  60. 1.624 km ENE of Greenfield, California · 13431 days ago · 5 km deep · 53 km away

The first 60 of 189.

Before

  1. 2.8Central California · 13438 days ago · 4 km deep · 13 km away
  2. 1.79 km S of Tres Pinos, California · 13438 days ago · 4 km deep · 13 km away
  3. 2.410 km S of Tres Pinos, California · 13438 days ago · 4 km deep · 14 km away
  4. 2.410 km S of Tres Pinos, California · 13438 days ago · 5 km deep · 14 km away
  5. 2.110 km S of Tres Pinos, California · 13438 days ago · 4 km deep · 14 km away
  6. 2.310 km S of Tres Pinos, California · 13438 days ago · 4 km deep · 13 km away
  7. 1.68 km ENE of Gilroy, California · 13438 days ago · 7 km deep · 32 km away
  8. 1.65 km ESE of Interlaken, California · 13438 days ago · 7 km deep · 29 km away
  9. 1.910 km S of Tres Pinos, California · 13438 days ago · 4 km deep · 13 km away
  10. 2.210 km S of Tres Pinos, California · 13438 days ago · 4 km deep · 13 km away
  11. 3.810 km S of Tres Pinos, California · 13438 days ago · 5 km deep · 13 km away
  12. 1.55 km ESE of Lexington Hills, California · 13438 days ago · 11 km deep · 60 km away
  13. 1.72 km SSW of Lexington Hills, California · 13439 days ago · 12 km deep · 64 km away
  14. 1.92 km S of Rio Del Mar, California · 13439 days ago · 50 km deep · 44 km away
  15. 3.75 km WNW of Day Valley, California · 13439 days ago · 18 km deep · 53 km away
  16. 1.924 km NE of King City, California · 13439 days ago · 0 km deep · 60 km away
  17. 1.83 km WNW of San Juan Bautista, California · 13439 days ago · 6 km deep · 16 km away
  18. 2.94 km W of San Juan Bautista, California · 13439 days ago · 6 km deep · 16 km away
  19. 1.625 km SE of Tres Pinos, California · 13439 days ago · 5 km deep · 34 km away
  20. 1.78 km ENE of Gilroy, California · 13439 days ago · 6 km deep · 31 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc149184. Read Sat, Oct 3, 2026, 9:37 PM UTC.