Washington earthquakes

M1.9 earthquake Washington

A magnitude 1.9 earthquake struck in Washington on Tue, Jul 31, 1979, 11:33 AM PDT (18:33 UTC), 26 km (16 mi) below the surface.

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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
1.9 (md), micro
Local time
UTC
1979-07-31 18:33:03 UTC
Depth
26.5 km (16.5 mi), shallow
Epicenter
46.069° N, 122.850° 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 1.0 km horizontally, 2.1 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
254°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.516 km S of Morton, Washington · 17218 days ago · 20 km deep · 56 km away
  2. 1.714 km S of Packwood, Washington · 17184 days ago · 2 km deep · 99 km away
  3. 1.9Washington · 17181 days ago · 10 km deep · 62 km away
  4. 1.68 km SW of Morton, Washington · 17170 days ago · 20 km deep · 62 km away

Before

  1. 1.728 km S of Morton, Washington · 17227 days ago · 5 km deep · 55 km away
  2. 1.710 km WNW of North Portland, Oregon · 17236 days ago · 13 km deep · 46 km away
  3. 1.69 km SSW of Morton, Washington · 17242 days ago · 19 km deep · 61 km away
  4. 1.810 km SSW of Morton, Washington · 17243 days ago · 19 km deep · 60 km away
  5. 1.99 km SSW of Morton, Washington · 17244 days ago · 20 km deep · 61 km away
  6. 2.710 km SSW of Morton, Washington · 17244 days ago · 22 km deep · 60 km away
  7. 3.69 km SSW of Morton, Washington · 17244 days ago · 20 km deep · 61 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10850353. Read Wed, Sep 23, 2026, 5:20 AM UTC.