California earthquakes

M1.8 earthquake 1 km SSW of Floriston, California

A magnitude 1.8 earthquake struck 1 km SSW of Floriston, California on Mon, Oct 6, 1986, 9:28 PM PDT (04:28 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M1.9 1 km SW of Floriston, California. This one was a foreshock.

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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), micro
Local time
UTC
1986-10-07 04:28:02 UTC
Depth
4.0 km (2.5 mi), shallow
Epicenter
39.385° N, 120.028° 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 0.4 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
126°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.91 km SW of Floriston, California · 14596 days ago · 4 km deep · 0 km away
  2. 2.04 km WSW of Sierraville, California · 14587 days ago · -2 km deep · 39 km away
  3. 2.03 km SW of Sierraville, California · 14586 days ago · 5 km deep · 38 km away
  4. 1.93 km SW of Sierraville, California · 14586 days ago · 7 km deep · 38 km away
  5. 1.93 km SW of Sierraville, California · 14585 days ago · 5 km deep · 38 km away
  6. 1.72 km SSW of Sierraville, California · 14585 days ago · 7 km deep · 36 km away
  7. 2.34 km SSE of Doyle, California · 14583 days ago · 6 km deep · 68 km away
  8. 2.04 km SSW of Sattley, California · 14582 days ago · -1 km deep · 41 km away
  9. 1.84 km S of Sattley, California · 14581 days ago · -1 km deep · 40 km away
  10. 2.49 km SSW of Sattley, California · 14579 days ago · 4 km deep · 40 km away
  11. 2.14 km S of Sattley, California · 14574 days ago · -1 km deep · 41 km away
  12. 1.5Northern California · 14574 days ago · 7 km deep · 15 km away
  13. 4.6California-Nevada border region · 14570 days ago · 17 km deep · 86 km away
  14. 1.98 km NNW of Kingvale, California · 14570 days ago · 6 km deep · 36 km away
  15. 3.013 km E of Alta, California · 14569 days ago · 3 km deep · 57 km away
  16. 2.53 km SSW of Topaz Lake, Nevada · 14568 days ago · 4 km deep · 90 km away
  17. 1.99 km N of Truckee, California · 14562 days ago · 9 km deep · 15 km away
  18. 2.211 km SE of Sierraville, California · 14558 days ago · -1 km deep · 26 km away
  19. 3.014 km S of Kingvale, California · 14555 days ago · 5 km deep · 43 km away
  20. 2.24 km NW of Topaz, California · 14546 days ago · 3 km deep · 92 km away
  21. 1.63 km W of Topaz Lake, Nevada · 14543 days ago · 2 km deep · 86 km away
  22. 2.414 km S of Kingvale, California · 14543 days ago · -1 km deep · 43 km away
  23. 2.111 km N of Truckee, CA · 14539 days ago · 2 km deep · 12 km away
  24. 2.86 km W of Floriston, California · 14538 days ago · 3 km deep · 6 km away
  25. 2.07 km N of Greenhorn, California · 14537 days ago · 17 km deep · 91 km away
  26. 2.05 km N of Greenhorn, California · 14537 days ago · 6 km deep · 88 km away

Before

  1. 2.69 km SW of Doyle, California · 14596 days ago · -2 km deep · 66 km away
  2. 3.04 km WNW of Topaz, California · 14598 days ago · 5 km deep · 92 km away
  3. 1.88 km S of Sierraville, California · 14598 days ago · -1 km deep · 33 km away
  4. 1.6Northern California · 14599 days ago · 7 km deep · 14 km away
  5. 2.38 km N of Verdi, California · 14615 days ago · 2 km deep · 24 km away
  6. 2.25 km NW of Topaz, California · 14618 days ago · 7 km deep · 91 km away
  7. 1.711 km N of Truckee, California · 14620 days ago · 3 km deep · 12 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1144331. Read Tue, Sep 22, 2026, 9:34 PM UTC.