California earthquakes

M1.8 earthquake 5 km SW of Ridgemark, CA

A magnitude 1.8 earthquake struck 5 km SW of Ridgemark, CA on Mon, Dec 22, 2025, 7:19 PM PST (03:19 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.4 14 km S of Tres Pinos, CA. 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2025-12-23 03:19:01 UTC
Depth
6.9 km (4.3 mi), shallow
Epicenter
36.785° N, 121.409° 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 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
43°
Stations used
49

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 111 in the 60 days after this one and 75 in the 30 days before it.

After

  1. 1.65 km SW of Ridgemark, CA · 285 days ago · 8 km deep · 0 km away
  2. 1.65 km SW of Ridgemark, CA · 285 days ago · 6 km deep · 0 km away
  3. 2.55 km SW of Ridgemark, CA · 284 days ago · 7 km deep · 0 km away · felt by 1
  4. 2.320 km SE of Pinnacles, CA · 284 days ago · 10 km deep · 56 km away
  5. 1.76 km NNW of Hollister, CA · 283 days ago · 6 km deep · 13 km away
  6. 1.74 km SE of Portola Valley, CA · 282 days ago · 6 km deep · 95 km away
  7. 2.59 km NW of Pinnacles, CA · 282 days ago · 5 km deep · 28 km away
  8. 1.85 km SW of Ridgemark, CA · 281 days ago · 7 km deep · 0 km away
  9. 1.65 km SW of Ridgemark, CA · 281 days ago · 8 km deep · 0 km away · felt by 1
  10. 2.318 km NNW of New Idria, CA · 281 days ago · 10 km deep · 62 km away
  11. 1.75 km S of San Juan Bautista, CA · 280 days ago · 6 km deep · 12 km away
  12. 2.114 km SW of Cantua Creek, CA · 280 days ago · 13 km deep · 98 km away
  13. 1.614 km S of Tres Pinos, CA · 276 days ago · 4 km deep · 16 km away
  14. 2.215 km E of Seven Trees, CA · 275 days ago · 4 km deep · 61 km away
  15. 2.63 km ESE of Pinnacles, CA · 274 days ago · 5 km deep · 40 km away · felt by 2
  16. 2.84 km N of Corralitos, CA · 273 days ago · 13 km deep · 44 km away · felt by 559
  17. 2.110 km SE of Pinnacles, CA · 272 days ago · 5 km deep · 47 km away
  18. 1.910 km SE of Pinnacles, CA · 271 days ago · 7 km deep · 47 km away
  19. 1.79 km E of Alum Rock, CA · 270 days ago · 6 km deep · 70 km away
  20. 1.813 km S of Tres Pinos, CA · 270 days ago · 2 km deep · 14 km away
  21. 1.917 km WSW of Patterson, CA · 269 days ago · 5 km deep · 71 km away
  22. 1.95 km SW of Ridgemark, CA · 266 days ago · 7 km deep · 0 km away
  23. 1.64 km NW of Pinnacles, CA · 266 days ago · 6 km deep · 33 km away
  24. 2.48 km NW of Pinnacles, CA · 265 days ago · 7 km deep · 29 km away
  25. 2.07 km NW of Pinnacles, CA · 265 days ago · 5 km deep · 30 km away
  26. 1.55 km NNW of Pinnacles, CA · 265 days ago · 9 km deep · 32 km away
  27. 1.711 km SE of Livermore, CA · 264 days ago · 5 km deep · 94 km away
  28. 1.613 km SE of Livermore, CA · 264 days ago · 8 km deep · 93 km away
  29. 1.611 km SE of Livermore, CA · 264 days ago · 4 km deep · 95 km away
  30. 1.511 km SE of Livermore, CA · 264 days ago · 4 km deep · 94 km away · felt by 1
  31. 3.023 km ENE of Alum Rock, CA · 262 days ago · 9 km deep · 77 km away · felt by 22
  32. 1.823 km ENE of Alum Rock, CA · 262 days ago · 8 km deep · 77 km away
  33. 3.414 km S of Tres Pinos, CA · 261 days ago · 6 km deep · 16 km away · felt by 13
  34. 1.913 km NNE of Tres Pinos, CA · 261 days ago · 7 km deep · 19 km away
  35. 3.214 km S of Tres Pinos, CA · 260 days ago · 6 km deep · 17 km away · felt by 2
  36. 2.215 km S of Tres Pinos, CA · 260 days ago · 5 km deep · 17 km away
  37. 1.815 km S of Tres Pinos, CA · 260 days ago · 4 km deep · 17 km away
  38. 2.215 km S of Tres Pinos, CA · 260 days ago · 5 km deep · 17 km away
  39. 2.712 km S of Tres Pinos, CA · 258 days ago · 5 km deep · 13 km away · felt by 2
  40. 1.615 km S of Tres Pinos, CA · 258 days ago · 5 km deep · 17 km away
  41. 1.713 km S of Tres Pinos, CA · 258 days ago · 4 km deep · 13 km away
  42. 1.78 km NW of Pinnacles, CA · 258 days ago · 1 km deep · 29 km away
  43. 2.615 km S of Tres Pinos, CA · 257 days ago · 5 km deep · 16 km away · felt by 2
  44. 1.64 km NNE of Pinnacles, CA · 257 days ago · 10 km deep · 35 km away
  45. 1.713 km SE of Pinnacles, CA · 257 days ago · 0 km deep · 50 km away
  46. 1.83 km NNE of Pinnacles, CA · 257 days ago · 10 km deep · 35 km away
  47. 1.819 km NNE of New Idria, CA · 257 days ago · 6 km deep · 78 km away
  48. 1.510 km SSW of Ridgemark, CA · 257 days ago · 9 km deep · 5 km away
  49. 1.64 km WNW of San Juan Bautista, CA · 256 days ago · 7 km deep · 18 km away
  50. 2.110 km SSE of San Juan Bautista, CA · 255 days ago · 7 km deep · 7 km away · felt by 2
  51. 1.65 km SSE of Pinnacles, CA · 255 days ago · 6 km deep · 42 km away
  52. 1.831 km SW of South Dos Palos, CA · 255 days ago · 3 km deep · 44 km away
  53. 2.05 km SE of Pinnacles, CA · 254 days ago · 6 km deep · 42 km away
  54. 1.617 km S of Tres Pinos, CA · 254 days ago · 5 km deep · 18 km away
  55. 1.71 km W of Pinnacles, CA · 253 days ago · 6 km deep · 36 km away · felt by 1
  56. 1.74 km SE of Pinnacles, CA · 252 days ago · 1 km deep · 41 km away
  57. 1.77 km SSW of Livermore, CA · 252 days ago · 11 km deep · 99 km away · felt by 1
  58. 2.415 km S of Tres Pinos, CA · 249 days ago · 3 km deep · 17 km away
  59. 2.02 km ENE of Aromas, CA · 249 days ago · 1 km deep · 23 km away
  60. 1.65 km ESE of Sunol, CA · 249 days ago · 9 km deep · 97 km away

The first 60 of 111.

Before

  1. 1.78 km SE of Pinnacles, CA · 286 days ago · 6 km deep · 45 km away
  2. 3.316 km S of Tres Pinos, CA · 286 days ago · 5 km deep · 18 km away · felt by 11
  3. 1.65 km SW of Ridgemark, CA · 286 days ago · 7 km deep · 0 km away
  4. 1.621 km SE of Livermore, CA · 286 days ago · 2 km deep · 85 km away
  5. 2.65 km SW of Ridgemark, CA · 287 days ago · 7 km deep · 0 km away · felt by 1
  6. 1.83 km N of Pinnacles, CA · 287 days ago · 9 km deep · 35 km away
  7. 2.15 km SW of Ridgemark, CA · 287 days ago · 6 km deep · 1 km away
  8. 1.85 km SW of Ridgemark, CA · 287 days ago · 6 km deep · 0 km away
  9. 1.95 km SW of Ridgemark, CA · 287 days ago · 7 km deep · 0 km away
  10. 3.34 km WSW of Ridgemark, CA · 287 days ago · 7 km deep · 1 km away · felt by 40
  11. 2.04 km S of San Juan Bautista, CA · 287 days ago · 7 km deep · 12 km away · felt by 2
  12. 1.613 km SSW of Tres Pinos, CA · 288 days ago · 1 km deep · 13 km away
  13. 3.320 km NE of San Lucas, CA · 288 days ago · 7 km deep · 80 km away · felt by 5
  14. 2.110 km SSE of San Juan Bautista, CA · 290 days ago · 7 km deep · 8 km away
  15. 2.79 km SSE of San Juan Bautista, CA · 290 days ago · 7 km deep · 8 km away · felt by 14
  16. 1.64 km SSE of Pinnacles, CA · 291 days ago · 2 km deep · 41 km away
  17. 1.815 km SE of Pinnacles, CA · 291 days ago · 8 km deep · 52 km away
  18. 1.99 km E of Gilroy, CA · 293 days ago · 4 km deep · 25 km away
  19. 1.811 km ENE of Milpitas, CA · 294 days ago · 10 km deep · 83 km away · felt by 1
  20. 1.517 km SSW of Gustine, CA · 295 days ago · 0 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc75285076. Read Sun, Oct 4, 2026, 1:48 PM UTC.