Washington earthquakes

M1.8 earthquake 12 km SW of Entiat, Washington

A magnitude 1.8 earthquake struck 12 km SW of Entiat, Washington on Fri, Mar 23, 1990, 10:42 AM PST (18:42 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.8 13 km NNW of Hartline, Washington. This one was a foreshock.

Entiat 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, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1990-03-23 18:42:52 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
47.611° N, 120.347° 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 0.3 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
182°, poorly surrounded by stations
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.28 km NNE of Cashmere, Washington · 13341 days ago · 7 km deep · 5 km away
  2. 1.812 km NW of Malott, Washington · 13338 days ago · 7 km deep · 92 km away
  3. 2.813 km NNW of Hartline, Washington · 13334 days ago · 7 km deep · 91 km away
  4. 1.79 km WNW of Entiat, Washington · 13331 days ago · 0 km deep · 12 km away
  5. 1.84 km NE of Entiat, Washington · 13323 days ago · -1 km deep · 17 km away
  6. 1.88 km WSW of Chelan, Washington · 13321 days ago · 4 km deep · 28 km away
  7. 2.69 km NNW of Entiat, Washington · 13318 days ago · 0 km deep · 17 km away
  8. 2.610 km W of Mattawa, Washington · 13315 days ago · 2 km deep · 98 km away
  9. 1.69 km NNE of Entiat, Washington · 13313 days ago · 0 km deep · 21 km away
  10. 2.613 km W of Mansfield, Washington · 13311 days ago · -1 km deep · 47 km away
  11. 1.86 km W of Entiat, Washington · 13309 days ago · -1 km deep · 9 km away
  12. 2.26 km ESE of Mansfield, Washington · 13299 days ago · 0 km deep · 62 km away
  13. 1.86 km ESE of Mansfield, Washington · 13299 days ago · 0 km deep · 62 km away
  14. 1.83 km NNW of Waterville, Washington · 13296 days ago · 7 km deep · 21 km away
  15. 1.61 km SE of Entiat, Washington · 13289 days ago · 4 km deep · 13 km away

Before

  1. 2.7Washington · 13345 days ago · 0 km deep · 73 km away
  2. 2.38 km WNW of Entiat, Washington · 13354 days ago · -1 km deep · 12 km away
  3. 3.129 km NW of Leavenworth, Washington · 13365 days ago · 0 km deep · 49 km away
  4. 2.09 km ESE of Mansfield, Washington · 13370 days ago · 2 km deep · 65 km away
  5. 2.36 km E of Vantage, Washington · 13373 days ago · 2 km deep · 82 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10257458. Read Sat, Oct 3, 2026, 10:42 AM UTC.