Washington earthquakes

M1.6 earthquake 8 km SSE of Mineral, Washington

A magnitude 1.6 earthquake struck 8 km SSE of Mineral, Washington on Wed, Feb 1, 1978, 3:39 AM PST (11:39 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.4 Washington. This one was a foreshock.

Morton forecastMore in Washington

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.6 (md), micro
Local time
UTC
1978-02-01 11:39:24 UTC
Depth
3.1 km (1.9 mi), shallow
Epicenter
46.639° N, 122.153° 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, 0.7 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
138°
Stations used
9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 1.64 km SSW of Orting, Washington · 17763 days ago · -1 km deep · 47 km away
  2. 2.4Washington · 17743 days ago · 10 km deep · 100 km away
  3. 1.63 km NNE of Hobart, Washington · 17742 days ago · 0 km deep · 91 km away
  4. 2.1Puget Sound region, Washington · 17740 days ago · 19 km deep · 97 km away
  5. 1.69 km WNW of Morton, Washington · 17739 days ago · 19 km deep · 18 km away
  6. 1.823 km N of Amboy, Washington · 17735 days ago · 12 km deep · 61 km away
  7. 1.911 km NE of Woodland, Washington · 17735 days ago · 4 km deep · 82 km away
  8. 4.85 km W of Burley, Washington · 17727 days ago · 22 km deep · 97 km away
  9. 1.53 km W of Burley, Washington · 17727 days ago · 22 km deep · 95 km away
  10. 1.85 km W of Burley, Washington · 17727 days ago · 22 km deep · 96 km away
  11. 2.25 km W of Burley, Washington · 17727 days ago · 21 km deep · 96 km away
  12. 1.74 km W of Burley, Washington · 17726 days ago · 21 km deep · 96 km away
  13. 1.54 km W of Burley, Washington · 17726 days ago · 25 km deep · 97 km away
  14. 4.16 km W of Burley, Washington · 17707 days ago · 21 km deep · 96 km away

Before

  1. 1.53 km WSW of Wilderness Rim, Washington · 17770 days ago · 19 km deep · 93 km away
  2. 2.010 km SSW of Shelton, Washington · 17771 days ago · 47 km deep · 93 km away
  3. 1.710 km WNW of Amboy, Washington · 17793 days ago · 2 km deep · 83 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10845733. Read Tue, Sep 22, 2026, 11:13 AM UTC.