Washington earthquakes

M1.8 earthquake 12 km NW of Mattawa, Washington

A magnitude 1.8 earthquake struck 12 km NW of Mattawa, Washington on Mon, Jan 20, 1986, 6:30 AM PST (14:30 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.0 27 km NNW of Benton City, Washington. This one was a foreshock.

Mattawa 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
1.8 (md), micro
Local time
UTC
1986-01-20 14:30:04 UTC
Depth
-0.5 km (-0.3 mi), shallow
Epicenter
46.808° N, 120.039° 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 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
66°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 2.027 km NNW of Benton City, Washington · 14847 days ago · -1 km deep · 47 km away
  2. 1.627 km NNW of Benton City, Washington · 14847 days ago · -1 km deep · 47 km away
  3. 1.65 km NNE of Waterville, Washington · 14847 days ago · 7 km deep · 98 km away
  4. 2.122 km NNE of Terrace Heights, Washington · 14845 days ago · 3 km deep · 21 km away
  5. 1.73 km ENE of Entiat, Washington · 14818 days ago · 4 km deep · 98 km away
  6. 2.110 km SW of Ellensburg, Washington · 14812 days ago · 4 km deep · 49 km away
  7. 2.49 km SW of Royal City, Washington · 14802 days ago · 3 km deep · 24 km away
  8. 2.22 km ESE of Union Gap, Washington · 14800 days ago · 7 km deep · 42 km away
  9. 1.83 km SE of Union Gap, Washington · 14800 days ago · 7 km deep · 43 km away

Before

  1. 1.90 km NNE of Yakima, Washington · 14863 days ago · 10 km deep · 42 km away
  2. 1.71 km W of Yakima, Washington · 14863 days ago · 11 km deep · 44 km away
  3. 1.613 km SSW of Thorp, Washington · 14864 days ago · 6 km deep · 56 km away
  4. 1.86 km W of Entiat, Washington · 14870 days ago · 3 km deep · 97 km away
  5. 1.714 km N of Naches, Washington · 14871 days ago · 11 km deep · 48 km away
  6. 2.022 km NNE of Terrace Heights, Washington · 14877 days ago · 4 km deep · 19 km away
  7. 2.18 km NNW of Moses Lake North, Washington · 14877 days ago · 18 km deep · 73 km away
  8. 1.723 km NNE of Terrace Heights, Washington · 14877 days ago · 3 km deep · 19 km away
  9. 1.823 km NNE of Terrace Heights, Washington · 14877 days ago · -1 km deep · 19 km away
  10. 2.13 km NE of West Valley, Washington · 14881 days ago · 7 km deep · 46 km away
  11. 1.53 km NE of West Valley, Washington · 14881 days ago · 8 km deep · 46 km away
  12. 2.43 km NNE of West Valley, Washington · 14881 days ago · 8 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10201833. Read Tue, Sep 22, 2026, 4:21 PM UTC.