California earthquakes

M1.8 earthquake 5 km W of Trinity Center, California

A magnitude 1.8 earthquake struck 5 km W of Trinity Center, California on Tue, Sep 20, 1983, 4:58 AM PDT (11:58 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M2.7 22 km SSE of Hayfork, California. This one was a foreshock.

Lewiston 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-09-20 11:58:45 UTC
Depth
4.1 km (2.5 mi), shallow
Epicenter
40.980° N, 122.765° 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 2.8 km horizontally, 21.2 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
179°
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 33 in the 60 days after this one and 18 in the 30 days before it.

After

  1. 2.418 km N of Big Bend, California · 15711 days ago · 9 km deep · 75 km away
  2. 2.018 km N of Big Bend, California · 15711 days ago · 5 km deep · 75 km away
  3. 2.08 km NE of Trinity Village, California · 15711 days ago · 19 km deep · 59 km away
  4. 2.51 km SW of Mad River, California · 15710 days ago · -1 km deep · 88 km away
  5. 2.47 km WNW of Central Valley (historical), California · 15709 days ago · 20 km deep · 40 km away
  6. 2.07 km WNW of Central Valley (historical), California · 15709 days ago · 26 km deep · 40 km away
  7. 1.81 km NNE of Palo Cedro, California · 15707 days ago · 20 km deep · 64 km away
  8. 1.89 km ESE of McCloud, California · 15706 days ago · 0 km deep · 67 km away
  9. 2.41 km ENE of Palo Cedro, California · 15706 days ago · 27 km deep · 64 km away
  10. 2.01 km W of Millville, California · 15706 days ago · 37 km deep · 67 km away
  11. 1.515 km ENE of Shingletown, California · 15705 days ago · 9 km deep · 99 km away
  12. 2.018 km N of Big Bend, California · 15705 days ago · 9 km deep · 75 km away
  13. 1.815 km E of McCloud, California · 15703 days ago · -2 km deep · 75 km away
  14. 2.412 km ENE of Bend, California · 15703 days ago · 2 km deep · 94 km away
  15. 2.10 km NE of Palo Cedro, California · 15702 days ago · 25 km deep · 64 km away
  16. 1.912 km W of Junction City, California · 15700 days ago · 12 km deep · 46 km away
  17. 2.213 km ESE of Cottonwood, California · 15698 days ago · 14 km deep · 87 km away
  18. 2.012 km E of Cottonwood, California · 15698 days ago · 11 km deep · 86 km away
  19. 2.20 km NE of Palo Cedro, California · 15694 days ago · 23 km deep · 64 km away
  20. 2.38 km NW of Central Valley (historical), California · 15694 days ago · 21 km deep · 39 km away
  21. 1.82 km SE of McCloud, California · 15693 days ago · 0 km deep · 61 km away
  22. 2.68 km WNW of Paynes Creek, California · 15690 days ago · 7 km deep · 93 km away
  23. 1.711 km SSW of Willow Creek, California · 15690 days ago · 28 km deep · 78 km away
  24. 2.412 km ENE of Bend, California · 15684 days ago · -1 km deep · 94 km away
  25. 1.814 km ESE of Burnt Ranch, California · 15683 days ago · 16 km deep · 51 km away
  26. 1.815 km SSW of Tennant, California · 15683 days ago · 3 km deep · 85 km away
  27. 2.621 km ENE of Burnt Ranch, California · 15678 days ago · 4 km deep · 41 km away
  28. 2.17 km N of Mad River, California · 15677 days ago · 0 km deep · 80 km away
  29. 1.98 km NE of Trinity Village, California · 15675 days ago · 20 km deep · 58 km away
  30. 2.411 km NE of Bend, California · 15675 days ago · -1 km deep · 92 km away
  31. 2.510 km SSE of Dunsmuir, California · 15675 days ago · 57 km deep · 49 km away
  32. 2.722 km SSE of Hayfork, California · 15669 days ago · 28 km deep · 72 km away
  33. 2.26 km WNW of Lakehead, California · 15660 days ago · 3 km deep · 27 km away

Before

  1. 2.017 km N of Big Bend, California · 15719 days ago · 13 km deep · 73 km away
  2. 2.218 km N of Big Bend, California · 15719 days ago · 8 km deep · 75 km away
  3. 2.012 km WSW of Dunsmuir, California · 15721 days ago · 14 km deep · 37 km away
  4. 1.911 km WSW of Dunsmuir, California · 15722 days ago · 16 km deep · 37 km away
  5. 1.618 km N of Big Bend, California · 15722 days ago · 12 km deep · 73 km away
  6. 2.012 km ENE of Bend, California · 15722 days ago · -1 km deep · 94 km away
  7. 2.51 km S of Mad River, California · 15722 days ago · 0 km deep · 87 km away
  8. 1.720 km ENE of Lakehead, California · 15723 days ago · 4 km deep · 51 km away
  9. 2.618 km NE of Willow Creek, California · 15724 days ago · 34 km deep · 59 km away
  10. 1.617 km WNW of Hyampom, California · 15725 days ago · 21 km deep · 79 km away
  11. 1.75 km NNE of Mad River, California · 15727 days ago · 4 km deep · 81 km away
  12. 2.17 km WNW of Hyampom, California · 15728 days ago · 26 km deep · 75 km away
  13. 1.68 km NNE of McCloud, California · 15728 days ago · 8 km deep · 68 km away
  14. 2.411 km ENE of Bend, California · 15729 days ago · 2 km deep · 95 km away
  15. 2.527 km NNE of Trinity Village, California · 15741 days ago · 31 km deep · 51 km away
  16. 1.99 km W of Mad River, California · 15743 days ago · -1 km deep · 94 km away
  17. 2.212 km ENE of Bend, California · 15744 days ago · 13 km deep · 96 km away
  18. 3.016 km SE of Ruth, California · 15745 days ago · 36 km deep · 100 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1103150. Read Fri, Oct 2, 2026, 1:54 PM UTC.