Washington earthquakes

M1.6 earthquake 16 km E of Mattawa, Washington

A magnitude 1.6 earthquake struck 16 km E of Mattawa, Washington on Tue, May 7, 1991, 9:19 PM PDT (04:19 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.4 7 km SE of Kittitas, Washington. This one was a foreshock.

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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
1.6 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-05-08 04:19:36 UTC
Depth
-0.3 km (-0.2 mi), shallow
Epicenter
46.737° N, 119.687° 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, 0.1 km in depth
Magnitude uncertainty
±0.07
Depth from
Operator assigned
Station coverage gap
36°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 1.98 km SSW of Prosser, Washington · 12903 days ago · 20 km deep · 68 km away
  2. 2.57 km SE of Kittitas, Washington · 12889 days ago · 3 km deep · 55 km away
  3. 1.57 km SE of Kittitas, Washington · 12888 days ago · 4 km deep · 55 km away
  4. 2.97 km SE of Kittitas, Washington · 12887 days ago · 4 km deep · 55 km away
  5. 2.68 km SE of Kittitas, Washington · 12887 days ago · 4 km deep · 54 km away
  6. 1.79 km SSW of Prosser, Washington · 12885 days ago · 23 km deep · 69 km away
  7. 1.58 km SE of Kittitas, Washington · 12883 days ago · 4 km deep · 54 km away
  8. 1.76 km SE of Kittitas, Washington · 12873 days ago · 3 km deep · 56 km away
  9. 3.47 km SE of Kittitas, Washington · 12873 days ago · 3 km deep · 54 km away
  10. 2.37 km SE of Kittitas, Washington · 12873 days ago · 3 km deep · 55 km away
  11. 1.75 km SSE of Kittitas, Washington · 12873 days ago · 1 km deep · 57 km away
  12. 2.17 km SE of Kittitas, Washington · 12873 days ago · 4 km deep · 54 km away
  13. 3.38 km SE of Kittitas, Washington · 12872 days ago · 3 km deep · 54 km away

Before

  1. 1.515 km E of Kittitas, Washington · 12940 days ago · 8 km deep · 48 km away
  2. 1.923 km NW of Bickleton, Washington · 12948 days ago · 4 km deep · 89 km away
  3. 2.214 km SE of Desert Aire, Washington · 12952 days ago · 17 km deep · 18 km away
  4. 1.8Washington · 12953 days ago · 17 km deep · 18 km away
  5. 2.914 km SE of Desert Aire, Washington · 12954 days ago · 18 km deep · 17 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10275813. Read Sat, Oct 3, 2026, 10:57 AM UTC.