California earthquakes

M1.7 earthquake 7 km WNW of Tobin, California

A magnitude 1.7 earthquake struck 7 km WNW of Tobin, California on Sun, Dec 19, 1982, 8:15 PM PST (04:15 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M1.8 15 km NNE of Princeton, California. This one was a foreshock.

Magalia 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
1.7 (md), micro
Local time
UTC
1982-12-20 04:15:44 UTC
Depth
7.2 km (4.5 mi), shallow
Epicenter
39.963° N, 121.395° 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 2.2 km horizontally, 14.5 km in depth
Magnitude uncertainty
±0.03
Depth from
From location
Station coverage gap
275°, poorly surrounded by stations
Stations used
4

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 1.815 km NNE of Princeton, California · 15981 days ago · 12 km deep · 67 km away
  2. 1.914 km SW of Lake Almanor West, California · 15977 days ago · 8 km deep · 21 km away
  3. 1.715 km N of Chester, California · 15976 days ago · 3 km deep · 55 km away
  4. 1.63 km WSW of Paradise, California · 15974 days ago · 18 km deep · 33 km away
  5. 1.817 km NE of Mineral, California · 15973 days ago · 10 km deep · 56 km away
  6. 2.8Northern California · 15971 days ago · 18 km deep · 82 km away
  7. 2.311 km S of Old Station, California · 15969 days ago · -2 km deep · 68 km away
  8. 1.85 km N of Little Grass Valley, California · 15968 days ago · 5 km deep · 42 km away
  9. 2.513 km NE of Butte Meadows, California · 15966 days ago · 7 km deep · 23 km away
  10. 1.727 km ENE of Old Station, California · 15962 days ago · 9 km deep · 92 km away
  11. 1.513 km NW of Chester, California · 15960 days ago · 3 km deep · 47 km away
  12. 1.712 km ENE of Mineral, California · 15959 days ago · 7 km deep · 49 km away
  13. 1.912 km ENE of Bend, California · 15959 days ago · 7 km deep · 67 km away
  14. 2.310 km NNW of Kingvale, California · 15956 days ago · 7 km deep · 100 km away
  15. 1.99 km S of Hamilton City, California · 15956 days ago · 18 km deep · 63 km away
  16. 2.16 km ESE of Palermo, California · 15953 days ago · 0 km deep · 62 km away
  17. 1.811 km SE of Millville, California · 15947 days ago · 1 km deep · 82 km away
  18. 1.94 km WNW of Dobbins, California · 15944 days ago · 17 km deep · 65 km away
  19. 1.91 km WNW of Princeton, California · 15941 days ago · 22 km deep · 82 km away
  20. 2.0Northern California · 15940 days ago · 4 km deep · 19 km away
  21. 2.54 km SSE of Canyondam, California · 15935 days ago · 5 km deep · 35 km away
  22. 1.81 km SSE of Twain, California · 15928 days ago · 3 km deep · 29 km away
  23. 1.91 km SSW of Twain, California · 15928 days ago · 3 km deep · 27 km away
  24. 2.01 km N of Keddie, California · 15928 days ago · 4 km deep · 37 km away

Before

  1. 1.616 km WSW of Old Station, California · 15996 days ago · 9 km deep · 77 km away
  2. 2.21 km SE of Graniteville, California · 15997 days ago · 20 km deep · 82 km away
  3. 2.08 km NNE of Princeton, California · 15998 days ago · 10 km deep · 74 km away
  4. 1.9Northern California · 15998 days ago · 4 km deep · 54 km away
  5. 2.44 km SSW of Greenville, California · 16001 days ago · 16 km deep · 39 km away
  6. 2.712 km NE of Bend, California · 16005 days ago · -1 km deep · 73 km away
  7. 2.17 km SSE of Sierra City, California · 16007 days ago · 4 km deep · 85 km away
  8. 2.67 km E of Downieville, California · 16010 days ago · 5 km deep · 71 km away
  9. 2.17 km N of Princeton, California · 16011 days ago · 16 km deep · 76 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1083264. Read Tue, Sep 22, 2026, 7:39 PM UTC.