Washington earthquakes

M1.5 earthquake 17 km ESE of Mansfield, Washington

A magnitude 1.5 earthquake struck 17 km ESE of Mansfield, Washington on Sat, Dec 22, 1979, 3:10 PM PST (23:10 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.6 2 km NNE of Chelan, Washington. 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
1.5 (md), micro
Local time
UTC
1979-12-22 23:10:02 UTC
Depth
-0.5 km (-0.3 mi), shallow
Epicenter
47.761° N, 119.416° 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 0.5 km horizontally
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
134°
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: 12 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.03 km NNE of Royal City, Washington · 17080 days ago · 0 km deep · 94 km away
  2. 1.72 km NNE of Royal City, Washington · 17080 days ago · 0 km deep · 95 km away
  3. 1.63 km NE of Royal City, Washington · 17080 days ago · 3 km deep · 94 km away
  4. 1.85 km N of Royal City, Washington · 17080 days ago · 0 km deep · 91 km away
  5. 1.73 km NNE of Royal City, Washington · 17080 days ago · 0 km deep · 94 km away
  6. 1.64 km NNE of Royal City, Washington · 17079 days ago · 1 km deep · 93 km away
  7. 1.73 km NNE of Royal City, Washington · 17079 days ago · 0 km deep · 93 km away
  8. 1.53 km NNE of Royal City, Washington · 17079 days ago · 0 km deep · 94 km away
  9. 2.62 km NNE of Chelan, Washington · 17074 days ago · -1 km deep · 45 km away
  10. 1.58 km WNW of Odessa, Washington · 17035 days ago · 13 km deep · 64 km away
  11. 1.726 km ESE of Waterville, Washington · 17025 days ago · 6 km deep · 31 km away
  12. 2.026 km S of Mansfield, Washington · 17025 days ago · 13 km deep · 29 km away

Before

  1. 1.83 km NNE of Royal City, Washington · 17083 days ago · 1 km deep · 94 km away
  2. 1.73 km NNE of Royal City, Washington · 17083 days ago · 0 km deep · 94 km away
  3. 1.67 km SSE of Okanogan, Washington · 17087 days ago · 3 km deep · 61 km away
  4. 1.99 km W of Entiat, Washington · 17089 days ago · -1 km deep · 69 km away
  5. 1.63 km ENE of Royal City, Washington · 17092 days ago · 0 km deep · 96 km away
  6. 1.83 km ENE of Royal City, Washington · 17098 days ago · 2 km deep · 95 km away
  7. 2.69 km SW of Chelan Falls, Washington · 17101 days ago · 6 km deep · 49 km away
  8. 2.66 km ENE of Royal City, Washington · 17104 days ago · 0 km deep · 93 km away
  9. 1.615 km W of Entiat, Washington · 17106 days ago · 0 km deep · 76 km away
  10. 1.83 km NE of Royal City, Washington · 17110 days ago · 4 km deep · 94 km away
  11. 1.55 km NE of Royal City, Washington · 17111 days ago · 0 km deep · 93 km away
  12. 3.45 km NE of Royal City, Washington · 17111 days ago · 3 km deep · 93 km away
  13. 2.54 km NE of Royal City, Washington · 17111 days ago · 2 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10851618. Read Tue, Sep 29, 2026, 1:36 PM UTC.