California earthquakes

M1.7 earthquake 6 km NW of Chester, California

A magnitude 1.7 earthquake struck 6 km NW of Chester, California on Thu, Feb 23, 1984, 8:37 AM PST (16:37 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M1.7 8 km NE of Butte Meadows, California. This one was a foreshock.

Chester 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
1.7 (md), micro
Local time
UTC
1984-02-23 16:37:04 UTC
Depth
11.0 km (6.8 mi), shallow
Epicenter
40.342° N, 121.295° 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 1.1 km horizontally, 3.0 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
214°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 59 in the 60 days after this one and 28 in the 30 days before it.

After

  1. 1.78 km NE of Butte Meadows, California · 15551 days ago · -2 km deep · 28 km away
  2. 1.914 km NE of Butte Meadows, California · 15550 days ago · 3 km deep · 22 km away
  3. 2.06 km NW of Chester, California · 15550 days ago · 11 km deep · 0 km away
  4. 1.67 km NNE of Oroville, California · 15550 days ago · 9 km deep · 88 km away
  5. 1.98 km NE of Stirling City, California · 15549 days ago · 0 km deep · 45 km away
  6. 2.011 km SW of Prattville, California · 15545 days ago · 3 km deep · 23 km away
  7. 2.19 km NE of Proberta, California · 15544 days ago · 28 km deep · 71 km away
  8. 2.41 km W of Plumas Eureka, California · 15543 days ago · 3 km deep · 82 km away
  9. 2.113 km E of Big Bend, California · 15542 days ago · 19 km deep · 83 km away
  10. 1.89 km E of Millville, California · 15542 days ago · 12 km deep · 69 km away
  11. 1.57 km WNW of Chester, California · 15541 days ago · 1 km deep · 1 km away
  12. 2.014 km NNW of Cassel, California · 15541 days ago · 4 km deep · 82 km away
  13. 1.710 km W of Shingletown, California · 15540 days ago · 21 km deep · 63 km away
  14. 1.71 km SSW of Lake Almanor Country Club, California · 15539 days ago · 3 km deep · 17 km away
  15. 1.816 km ENE of Mineral, California · 15537 days ago · 4 km deep · 14 km away
  16. 2.011 km WSW of Durham, California · 15536 days ago · 24 km deep · 99 km away
  17. 1.58 km WSW of Chester, California · 15532 days ago · 3 km deep · 9 km away
  18. 1.713 km WSW of Paynes Creek, California · 15530 days ago · 6 km deep · 65 km away
  19. 2.26 km E of Big Bend, California · 15529 days ago · 8 km deep · 89 km away
  20. 1.56 km SW of Hamilton City, California · 15528 days ago · 14 km deep · 97 km away
  21. 2.40 km WNW of Plumas Eureka, California · 15527 days ago · -1 km deep · 82 km away
  22. 1.83 km ENE of Big Bend, California · 15527 days ago · 4 km deep · 91 km away
  23. 2.71 km W of Plumas Eureka, California · 15526 days ago · -2 km deep · 82 km away
  24. 1.811 km N of Butte Meadows, California · 15526 days ago · 12 km deep · 26 km away
  25. 3.40 km NW of Plumas Eureka, California · 15526 days ago · -1 km deep · 81 km away
  26. 2.42 km WSW of Graeagle, California · 15526 days ago · 0 km deep · 85 km away
  27. 2.20 km SW of Blairsden, California · 15526 days ago · 4 km deep · 85 km away
  28. 2.91 km SW of Plumas Eureka, California · 15526 days ago · 1 km deep · 83 km away
  29. 1.82 km ENE of Millville, California · 15523 days ago · 17 km deep · 76 km away
  30. 1.82 km SSE of Chester, California · 15518 days ago · 3 km deep · 9 km away
  31. 1.94 km ENE of Millville, California · 15517 days ago · 4 km deep · 75 km away
  32. 2.69 km NW of Belden, California · 15517 days ago · 9 km deep · 32 km away
  33. 2.37 km NNW of Downieville, California · 15513 days ago · 29 km deep · 88 km away
  34. 1.65 km ESE of Big Bend, California · 15510 days ago · 4 km deep · 88 km away
  35. 1.64 km NW of Montgomery Creek, California · 15509 days ago · 7 km deep · 81 km away
  36. 1.92 km S of Plumas Eureka, California · 15509 days ago · 2 km deep · 84 km away
  37. 2.114 km NNE of Chester, California · 15507 days ago · 4 km deep · 13 km away
  38. 1.916 km S of Round Mountain, California · 15503 days ago · 17 km deep · 63 km away
  39. 1.90 km W of Plumas Eureka, California · 15501 days ago · 1 km deep · 82 km away
  40. 1.815 km NNE of Shingletown, California · 15501 days ago · 11 km deep · 57 km away
  41. 1.614 km NNE of Mineral, California · 15501 days ago · 3 km deep · 26 km away
  42. 1.50 km NE of Shasta Lake, California · 15497 days ago · 18 km deep · 98 km away
  43. 1.713 km W of Chester, California · 15494 days ago · 8 km deep · 9 km away
  44. 3.28 km SE of Mineral, California · 15494 days ago · 5 km deep · 20 km away
  45. 1.99 km SE of Mineral, California · 15494 days ago · 4 km deep · 20 km away
  46. 1.88 km SE of Mineral, California · 15494 days ago · 4 km deep · 20 km away
  47. 3.28 km SE of Mineral, California · 15494 days ago · 5 km deep · 21 km away
  48. 1.88 km SE of Mineral, California · 15494 days ago · 4 km deep · 20 km away
  49. 1.58 km SE of Mineral, California · 15494 days ago · 4 km deep · 20 km away
  50. 3.07 km SE of Mineral, California · 15494 days ago · 5 km deep · 20 km away
  51. 1.69 km SE of Mineral, California · 15494 days ago · 2 km deep · 19 km away
  52. 1.55 km SE of Mineral, California · 15494 days ago · 4 km deep · 21 km away
  53. 1.83 km ESE of Mineral, California · 15494 days ago · 4 km deep · 22 km away
  54. 1.58 km SE of Mineral, California · 15494 days ago · 3 km deep · 20 km away
  55. 1.57 km ESE of Mineral, California · 15493 days ago · -2 km deep · 18 km away
  56. 1.89 km SE of Mineral, California · 15493 days ago · 5 km deep · 20 km away
  57. 1.910 km NNW of Chester, California · 15493 days ago · -1 km deep · 5 km away
  58. 1.59 km NNW of Chester, California · 15493 days ago · 0 km deep · 4 km away
  59. 1.82 km SE of Chester, California · 15493 days ago · 6 km deep · 9 km away

Before

  1. 2.27 km WNW of Chester, California · 15552 days ago · 8 km deep · 1 km away
  2. 2.011 km ESE of Paynes Creek, California · 15557 days ago · 8 km deep · 42 km away
  3. 1.7Northern California · 15558 days ago · 16 km deep · 68 km away
  4. 2.23 km N of Belden, California · 15558 days ago · 1 km deep · 34 km away
  5. 1.68 km ENE of Millville, California · 15558 days ago · 8 km deep · 71 km away
  6. 2.16 km NNE of Burney, California · 15559 days ago · 3 km deep · 72 km away
  7. 1.94 km NNE of Burney, California · 15559 days ago · -1 km deep · 70 km away
  8. 1.94 km NNW of Burney, California · 15559 days ago · 10 km deep · 72 km away
  9. 2.23 km NE of Burney, California · 15560 days ago · 3 km deep · 68 km away
  10. 1.66 km ESE of Bella Vista, California · 15560 days ago · 22 km deep · 79 km away
  11. 2.46 km N of Millville, California · 15561 days ago · 22 km deep · 79 km away
  12. 2.12 km SW of Belden, California · 15562 days ago · 4 km deep · 39 km away
  13. 1.622 km NE of Shingletown, California · 15566 days ago · 11 km deep · 46 km away
  14. 1.67 km W of Burney, California · 15567 days ago · 3 km deep · 71 km away
  15. 3.022 km NE of Shingletown, California · 15568 days ago · 5 km deep · 46 km away
  16. 2.08 km WSW of Lake Almanor West, California · 15568 days ago · 10 km deep · 14 km away
  17. 1.618 km WSW of Old Station, California · 15569 days ago · 3 km deep · 40 km away
  18. 1.77 km WSW of Lake Almanor West, California · 15570 days ago · 3 km deep · 16 km away
  19. 1.610 km SSW of Hat Creek, California · 15570 days ago · 2 km deep · 49 km away
  20. 1.89 km WSW of Paynes Creek, California · 15570 days ago · 3 km deep · 62 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc7421. Read Wed, Sep 23, 2026, 1:01 AM UTC.