Washington earthquakes

M2.4 earthquake 6 km NW of Mattawa, Washington

A magnitude 2.4 earthquake struck 6 km NW of Mattawa, Washington on Sat, Sep 27, 1986, 11:38 PM PDT (06:38 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.9 14 km S of Ellensburg, 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
2.4 (md), micro
Local time
UTC
1986-09-28 06:38:13 UTC
Depth
0.2 km (0.1 mi), shallow
Epicenter
46.781° N, 119.964° 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 0.6 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
56°
Stations used
30

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.04 km NW of Mattawa, Washington · 14604 days ago · 4 km deep · 3 km away
  2. 1.67 km NW of Mattawa, Washington · 14604 days ago · 1 km deep · 1 km away
  3. 1.56 km NW of Mattawa, Washington · 14604 days ago · 3 km deep · 0 km away
  4. 1.75 km NW of Mattawa, Washington · 14604 days ago · 2 km deep · 2 km away
  5. 1.77 km NW of Mattawa, Washington · 14597 days ago · 2 km deep · 0 km away
  6. 1.76 km NW of Mattawa, Washington · 14593 days ago · 2 km deep · 1 km away
  7. 1.56 km NW of Mattawa, Washington · 14581 days ago · 1 km deep · 0 km away
  8. 1.514 km NW of Mattawa, Washington · 14579 days ago · 1 km deep · 8 km away
  9. 1.519 km W of White Swan, Washington · 14564 days ago · -1 km deep · 91 km away
  10. 2.914 km S of Ellensburg, Washington · 14563 days ago · 6 km deep · 47 km away
  11. 2.37 km NW of Mattawa, Washington · 14558 days ago · 1 km deep · 1 km away

Before

  1. 1.97 km NW of Mattawa, Washington · 14605 days ago · 0 km deep · 1 km away
  2. 2.410 km NNW of Mattawa, Washington · 14605 days ago · 5 km deep · 5 km away
  3. 2.16 km NW of Mattawa, Washington · 14606 days ago · 2 km deep · 0 km away
  4. 1.74 km NW of Mattawa, Washington · 14607 days ago · 1 km deep · 2 km away
  5. 1.65 km NW of Mattawa, Washington · 14623 days ago · 0 km deep · 2 km away
  6. 1.95 km NW of Mattawa, Washington · 14628 days ago · 0 km deep · 2 km away
  7. 1.515 km SW of Othello, Washington · 14630 days ago · 12 km deep · 51 km away
  8. 1.815 km SW of Othello, WA · 14630 days ago · 13 km deep · 52 km away
  9. 3.414 km SW of Othello, Washington · 14631 days ago · 14 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10213208. Read Tue, Sep 22, 2026, 11:18 AM UTC.