Washington earthquakes

M1.9 earthquake 7 km NW of Mattawa, Washington

A magnitude 1.9 earthquake struck 7 km NW of Mattawa, Washington on Sat, Sep 27, 1986, 4:34 PM PDT (23:34 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
1.9 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1986-09-27 23:34:55 UTC
Depth
-0.1 km (-0.0 mi), shallow
Epicenter
46.787° 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 0.7 km horizontally, 5.5 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
65°
Stations used
27

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 8 in the 30 days before it.

After

  1. 2.46 km NW of Mattawa, Washington · 14615 days ago · 0 km deep · 1 km away
  2. 2.04 km NW of Mattawa, Washington · 14615 days ago · 4 km deep · 3 km away
  3. 1.67 km NW of Mattawa, Washington · 14615 days ago · 1 km deep · 2 km away
  4. 1.56 km NW of Mattawa, Washington · 14615 days ago · 3 km deep · 1 km away
  5. 1.75 km NW of Mattawa, Washington · 14615 days ago · 2 km deep · 2 km away
  6. 1.77 km NW of Mattawa, Washington · 14608 days ago · 2 km deep · 1 km away
  7. 1.76 km NW of Mattawa, Washington · 14604 days ago · 2 km deep · 0 km away
  8. 1.56 km NW of Mattawa, Washington · 14593 days ago · 1 km deep · 1 km away
  9. 1.514 km NW of Mattawa, Washington · 14590 days ago · 1 km deep · 7 km away
  10. 1.519 km W of White Swan, Washington · 14576 days ago · -1 km deep · 91 km away
  11. 2.914 km S of Ellensburg, Washington · 14574 days ago · 6 km deep · 47 km away
  12. 2.37 km NW of Mattawa, Washington · 14570 days ago · 1 km deep · 2 km away

Before

  1. 2.410 km NNW of Mattawa, Washington · 14616 days ago · 5 km deep · 4 km away
  2. 2.16 km NW of Mattawa, Washington · 14617 days ago · 2 km deep · 1 km away
  3. 1.74 km NW of Mattawa, Washington · 14618 days ago · 1 km deep · 2 km away
  4. 1.65 km NW of Mattawa, Washington · 14634 days ago · 0 km deep · 3 km away
  5. 1.95 km NW of Mattawa, Washington · 14639 days ago · 0 km deep · 2 km away
  6. 1.515 km SW of Othello, Washington · 14642 days ago · 12 km deep · 52 km away
  7. 1.815 km SW of Othello, WA · 14642 days ago · 13 km deep · 52 km away
  8. 3.414 km SW of Othello, Washington · 14642 days ago · 14 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10213143. Read Sat, Oct 3, 2026, 4:29 PM UTC.