Washington earthquakes

M1.9 earthquake 8 km SSW of Prosser, Washington

A magnitude 1.9 earthquake struck 8 km SSW of Prosser, Washington on Wed, Jun 5, 1991, 11:18 PM PDT (06:18 UTC), 20 km (13 mi) below the surface.

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

Prosser 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
1991-06-06 06:18:58 UTC
Depth
20.2 km (12.5 mi), shallow
Epicenter
46.134° N, 119.791° 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 1.2 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
71°
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: 18 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 2.57 km SE of Kittitas, Washington · 12888 days ago · 3 km deep · 98 km away
  2. 1.57 km SE of Kittitas, Washington · 12888 days ago · 4 km deep · 98 km away
  3. 2.97 km SE of Kittitas, Washington · 12886 days ago · 4 km deep · 99 km away
  4. 2.68 km SE of Kittitas, Washington · 12886 days ago · 4 km deep · 98 km away
  5. 1.79 km SSW of Prosser, Washington · 12885 days ago · 23 km deep · 1 km away
  6. 1.58 km SE of Kittitas, Washington · 12882 days ago · 4 km deep · 98 km away
  7. 1.76 km SE of Kittitas, Washington · 12873 days ago · 3 km deep · 100 km away
  8. 3.47 km SE of Kittitas, Washington · 12872 days ago · 3 km deep · 99 km away
  9. 2.37 km SE of Kittitas, Washington · 12872 days ago · 3 km deep · 98 km away
  10. 1.75 km SSE of Kittitas, Washington · 12872 days ago · 1 km deep · 100 km away
  11. 2.17 km SE of Kittitas, Washington · 12872 days ago · 4 km deep · 99 km away
  12. 3.38 km SE of Kittitas, Washington · 12872 days ago · 3 km deep · 98 km away
  13. 2.07 km SE of Kittitas, Washington · 12871 days ago · 3 km deep · 99 km away
  14. 2.6Washington · 12871 days ago · 4 km deep · 98 km away
  15. 2.68 km SE of Kittitas, Washington · 12870 days ago · 4 km deep · 98 km away
  16. 1.67 km SE of Kittitas, Washington · 12860 days ago · 2 km deep · 99 km away
  17. 1.716 km E of Mattawa, Washington · 12857 days ago · 0 km deep · 67 km away
  18. 1.716 km E of Mattawa, Washington · 12845 days ago · 0 km deep · 67 km away

Before

  1. 2.17 km WNW of Touchet, Washington · 12904 days ago · 4 km deep · 80 km away
  2. 1.628 km SW of White Swan, Washington · 12911 days ago · -1 km deep · 93 km away
  3. 1.616 km E of Mattawa, Washington · 12932 days ago · 0 km deep · 68 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10274938. Read Fri, Oct 2, 2026, 7:16 PM UTC.