California earthquakes

M2.3 earthquake 20km NNE of Redway, CA

A magnitude 2.3 earthquake struck 20km NNE of Redway, CA on Mon, Dec 20, 2021, 2:33 PM PST (22:33 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M4.6 50km W of Petrolia, CA. This one was a foreshock.

Miranda 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
2.3 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-12-20 22:33:31 UTC
Depth
25.9 km (16.1 mi), shallow
Epicenter
40.294° N, 123.767° W
Felt reports
3
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

3 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.3 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
38°
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 95 in the 30 days before it.

After

  1. 2.610km NNW of Petrolia, CA · 1749 days ago · 26 km deep · 48 km away
  2. 2.833km W of Petrolia, CA · 1749 days ago · 19 km deep · 77 km away
  3. 2.829km W of Petrolia, CA · 1749 days ago · 19 km deep · 73 km away · felt by 3
  4. 2.622km SW of Ferndale, CA · 1749 days ago · 27 km deep · 63 km away
  5. 2.011km NNE of Petrolia, CA · 1749 days ago · 28 km deep · 42 km away
  6. 2.512km SW of Rio Dell, CA · 1749 days ago · 28 km deep · 41 km away
  7. 2.47km NNW of Petrolia, CA · 1749 days ago · 26 km deep · 46 km away
  8. 2.621km W of Petrolia, CA · 1749 days ago · 21 km deep · 65 km away
  9. 1.920km SSE of Rio Dell, CA · 1749 days ago · 31 km deep · 24 km away
  10. 2.729km W of Petrolia, CA · 1749 days ago · 21 km deep · 73 km away · felt by 1
  11. 2.28km N of Petrolia, CA · 1749 days ago · 26 km deep · 45 km away
  12. 2.311km SSW of Ferndale, CA · 1749 days ago · 19 km deep · 50 km away
  13. 2.814km N of Petrolia, CA · 1749 days ago · 23 km deep · 49 km away
  14. 1.97km N of Petrolia, CA · 1749 days ago · 26 km deep · 44 km away
  15. 1.814km N of Petrolia, CA · 1749 days ago · 23 km deep · 49 km away
  16. 1.79km SSW of Ferndale, CA · 1749 days ago · 18 km deep · 51 km away
  17. 3.08km SSW of Ferndale, CA · 1749 days ago · 18 km deep · 51 km away · felt by 1
  18. 2.311km SSW of Ferndale, CA · 1749 days ago · 19 km deep · 50 km away
  19. 2.88km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 42 km away
  20. 2.627km W of Petrolia, CA · 1749 days ago · 19 km deep · 70 km away
  21. 2.66km SE of Ferndale, CA · 1749 days ago · 26 km deep · 47 km away
  22. 2.28km NNE of Petrolia, CA · 1749 days ago · 25 km deep · 44 km away
  23. 1.98km N of Petrolia, CA · 1749 days ago · 24 km deep · 46 km away
  24. 2.38km NNE of Petrolia, CA · 1749 days ago · 24 km deep · 43 km away
  25. 1.820km SSE of Rio Dell, CA · 1749 days ago · 29 km deep · 24 km away
  26. 2.46km N of Petrolia, CA · 1749 days ago · 25 km deep · 45 km away
  27. 2.815km WSW of Petrolia, CA · 1749 days ago · 20 km deep · 59 km away
  28. 1.69km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 42 km away
  29. 2.89km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 42 km away
  30. 2.57km N of Petrolia, CA · 1749 days ago · 25 km deep · 45 km away
  31. 2.69km N of Petrolia, CA · 1749 days ago · 27 km deep · 44 km away
  32. 2.744km WNW of Petrolia, CA · 1749 days ago · 17 km deep · 87 km away
  33. 2.713km WSW of Rio Dell, CA · 1749 days ago · 27 km deep · 44 km away
  34. 3.810km NNE of Petrolia, CA · 1749 days ago · 27 km deep · 42 km away · felt by 4
  35. 2.817km NNW of Petrolia, CA · 1749 days ago · 23 km deep · 55 km away · felt by 2
  36. 2.818km NW of Petrolia, CA · 1749 days ago · 24 km deep · 57 km away
  37. 3.814km N of Petrolia, CA · 1749 days ago · 28 km deep · 47 km away · felt by 4
  38. 2.225km W of Petrolia, CA · 1748 days ago · 19 km deep · 69 km away · felt by 1
  39. 2.313km N of Petrolia, CA · 1748 days ago · 25 km deep · 49 km away
  40. 2.730km W of Petrolia, CA · 1748 days ago · 21 km deep · 74 km away
  41. 2.07km N of Petrolia, CA · 1748 days ago · 25 km deep · 44 km away
  42. 1.65km E of Petrolia, CA · 1748 days ago · 22 km deep · 39 km away
  43. 2.27km WSW of Petrolia, CA · 1748 days ago · 20 km deep · 50 km away
  44. 2.828km W of Petrolia, CA · 1748 days ago · 17 km deep · 72 km away
  45. 1.67km S of Ferndale, CA · 1748 days ago · 23 km deep · 49 km away
  46. 1.812km SSW of Ferndale, CA · 1748 days ago · 19 km deep · 51 km away
  47. 1.610km SSW of Ferndale, CA · 1748 days ago · 23 km deep · 49 km away
  48. 1.68km N of Petrolia, CA · 1748 days ago · 25 km deep · 46 km away
  49. 2.732km W of Petrolia, CA · 1748 days ago · 20 km deep · 76 km away
  50. 2.97km N of Petrolia, CA · 1748 days ago · 25 km deep · 45 km away
  51. 2.317km WSW of Petrolia, CA · 1748 days ago · 20 km deep · 60 km away
  52. 3.212km SSW of Ferndale, CA · 1748 days ago · 28 km deep · 50 km away · felt by 11
  53. 2.414km S of Ferndale, CA · 1748 days ago · 26 km deep · 48 km away
  54. 1.84km ENE of Petrolia, CA · 1748 days ago · 23 km deep · 40 km away
  55. 2.811km N of Petrolia, CA · 1748 days ago · 24 km deep · 48 km away · felt by 5
  56. 3.230km W of Petrolia, CA · 1748 days ago · 21 km deep · 74 km away · felt by 2
  57. 3.13km E of Covelo, CA · 1748 days ago · -1 km deep · 73 km away · felt by 11
  58. 2.838km WNW of Petrolia, CA · 1748 days ago · 22 km deep · 82 km away
  59. 2.825km W of Petrolia, CA · 1748 days ago · 20 km deep · 69 km away · felt by 2
  60. 2.929km ENE of Willow Creek, CA · 1748 days ago · 40 km deep · 90 km away · felt by 1

The first 60 of at least 199.

Before

  1. 2.012km S of Ferndale, CA · 1749 days ago · 24 km deep · 46 km away
  2. 2.37km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 43 km away · felt by 4
  3. 2.410km NNE of Petrolia, CA · 1749 days ago · 24 km deep · 43 km away
  4. 2.68km W of Petrolia, CA · 1749 days ago · 31 km deep · 51 km away · felt by 2
  5. 1.94km NNE of Petrolia, CA · 1749 days ago · 28 km deep · 43 km away
  6. 3.96km NE of Petrolia, CA · 1749 days ago · 27 km deep · 40 km away · felt by 1
  7. 3.318km SW of Ferndale, CA · 1749 days ago · 25 km deep · 59 km away · felt by 2
  8. 2.212km SSW of Ferndale, CA · 1749 days ago · 21 km deep · 51 km away
  9. 2.312km SW of Rio Dell, CA · 1749 days ago · 29 km deep · 42 km away
  10. 2.411km SSW of Ferndale, CA · 1749 days ago · 21 km deep · 51 km away
  11. 2.411km NNE of Petrolia, CA · 1749 days ago · 28 km deep · 42 km away
  12. 2.414km NNW of Petrolia, CA · 1749 days ago · 22 km deep · 50 km away
  13. 3.211km NNE of Petrolia, CA · 1749 days ago · 23 km deep · 42 km away · felt by 1
  14. 2.04km ENE of Petrolia, CA · 1749 days ago · 21 km deep · 41 km away
  15. 2.612km SSW of Ferndale, CA · 1749 days ago · 25 km deep · 49 km away
  16. 2.715km SW of Ferndale, CA · 1749 days ago · 26 km deep · 55 km away
  17. 2.614km N of Petrolia, CA · 1749 days ago · 27 km deep · 50 km away
  18. 3.313km SSW of Ferndale, CA · 1749 days ago · 24 km deep · 49 km away · felt by 7
  19. 2.412km S of Ferndale, CA · 1749 days ago · 25 km deep · 48 km away
  20. 2.38km SSW of Ferndale, CA · 1749 days ago · 19 km deep · 50 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73666551. Read Sun, Oct 4, 2026, 4:26 PM UTC.