California earthquakes

M1.8 earthquake 36km SE of Fall River Mills, CA

A magnitude 1.8 earthquake struck 36km SE of Fall River Mills, CA on Sun, Oct 31, 2021, 9:26 AM PDT (16:26 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M2.8 2km NE of Almanor, CA. This one was a foreshock.

Fall River Mills 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
2021-10-31 16:26:23 UTC
Depth
14.1 km (8.7 mi), shallow
Epicenter
40.740° N, 121.186° 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, 2.0 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
192°, poorly surrounded by stations
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 1.619km NE of Big Bend, CA · 1798 days ago · 4 km deep · 61 km away
  2. 2.13km NNE of Chester, CA · 1796 days ago · 9 km deep · 46 km away
  3. 1.916km SSE of McCloud, CA · 1796 days ago · 8 km deep · 84 km away
  4. 2.511km NNE of Bella Vista, CA · 1795 days ago · 9 km deep · 84 km away · felt by 2
  5. 1.812km NE of Bella Vista, CA · 1795 days ago · 7 km deep · 81 km away · felt by 1
  6. 1.69km S of Mineral, CA · 1779 days ago · 14 km deep · 60 km away
  7. 2.82km NE of Almanor, CA · 1779 days ago · 8 km deep · 57 km away · felt by 5
  8. 1.93km NE of Viola, CA · 1775 days ago · 6 km deep · 45 km away
  9. 1.612km N of Mineral, CA · 1775 days ago · 4 km deep · 43 km away
  10. 1.77km SSE of Mineral, CA · 1772 days ago · 12 km deep · 58 km away
  11. 1.711km NNE of Bella Vista, CA · 1772 days ago · 10 km deep · 84 km away
  12. 1.612km W of Chester, CA · 1772 days ago · 7 km deep · 53 km away
  13. 1.58km SSE of Mineral, CA · 1772 days ago · 10 km deep · 59 km away
  14. 1.712km WSW of Chester, CA · 1772 days ago · 7 km deep · 53 km away
  15. 2.416km SSE of Mineral, CA · 1772 days ago · 6 km deep · 64 km away
  16. 1.99km E of Montgomery Creek, CA · 1765 days ago · 13 km deep · 54 km away
  17. 1.713km NNE of Shingletown, CA · 1761 days ago · 10 km deep · 56 km away
  18. 1.71km NE of Shasta Lake, CA · 1760 days ago · 16 km deep · 99 km away
  19. 2.52km ENE of Prattville, CA · 1760 days ago · 5 km deep · 58 km away · felt by 1
  20. 2.82km ENE of Prattville, CA · 1760 days ago · 6 km deep · 58 km away · felt by 10
  21. 1.62km E of Prattville, CA · 1759 days ago · 4 km deep · 59 km away
  22. 2.221km NE of Viola, CA · 1754 days ago · 12 km deep · 29 km away
  23. 1.810km ESE of Millville, CA · 1751 days ago · 16 km deep · 79 km away
  24. 2.421km SSE of Mineral, CA · 1747 days ago · 15 km deep · 68 km away · felt by 2
  25. 2.39km WSW of Shingletown, CA · 1746 days ago · 11 km deep · 74 km away
  26. 1.67km WSW of Shingletown, CA · 1746 days ago · 13 km deep · 73 km away · felt by 1
  27. 1.629 km NW of Susanville, California · 1742 days ago · 0 km deep · 28 km away
  28. 2.33km ENE of Prattville, CA · 1740 days ago · 6 km deep · 59 km away
  29. 2.53km E of Prattville, CA · 1740 days ago · 5 km deep · 59 km away · felt by 2

Before

  1. 2.75km ENE of East Quincy, CA · 1801 days ago · 5 km deep · 93 km away · felt by 7
  2. 1.83km NNE of Chester, CA · 1802 days ago · 10 km deep · 45 km away
  3. 2.13km NNE of Chester, CA · 1802 days ago · 8 km deep · 45 km away
  4. 2.114km ESE of Viola, CA · 1804 days ago · 4 km deep · 41 km away
  5. 2.113km NE of Montgomery Creek, CA · 1806 days ago · 12 km deep · 57 km away
  6. 1.913km WSW of Almanor, CA · 1817 days ago · 9 km deep · 64 km away
  7. 1.616km N of Shingletown, CA · 1817 days ago · 11 km deep · 59 km away · felt by 1
  8. 1.612km SE of Dunsmuir, CA · 1822 days ago · 4 km deep · 93 km away
  9. 2.513km SE of Dunsmuir, CA · 1822 days ago · 7 km deep · 92 km away · felt by 11
  10. 2.110km NNW of Burney, CA · 1824 days ago · 10 km deep · 52 km away
  11. 2.522km W of Reederville, NV · 1826 days ago · -1 km deep · 94 km away
  12. 1.74km NW of Bella Vista, CA · 1827 days ago · 27 km deep · 91 km away
  13. 2.12km NW of Bella Vista, CA · 1828 days ago · 26 km deep · 91 km away
  14. 1.99km WSW of Chester, CA · 1829 days ago · 4 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73647080. Read Sun, Oct 4, 2026, 2:44 PM UTC.