Washington earthquakes

M1.8 earthquake 12 km NW of Malott, Washington

A magnitude 1.8 earthquake struck 12 km NW of Malott, Washington on Wed, Mar 28, 1990, 2:00 AM PST (10:00 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.8 13 km NNW of Hartline, 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
1.8 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1990-03-28 10:00:49 UTC
Depth
6.5 km (4.1 mi), shallow
Epicenter
48.366° N, 119.828° 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 4.7 km horizontally, 97.6 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
242°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 2.813 km NNW of Hartline, Washington · 13334 days ago · 7 km deep · 79 km away
  2. 1.79 km WNW of Entiat, Washington · 13330 days ago · 0 km deep · 80 km away
  3. 1.84 km NE of Entiat, Washington · 13323 days ago · -1 km deep · 78 km away
  4. 1.88 km WSW of Chelan, Washington · 13321 days ago · 4 km deep · 65 km away
  5. 2.69 km NNW of Entiat, Washington · 13318 days ago · 0 km deep · 76 km away
  6. 2.014 km S of Loomis, Washington · 13313 days ago · 0 km deep · 38 km away
  7. 1.69 km NNE of Entiat, Washington · 13312 days ago · 0 km deep · 72 km away
  8. 2.613 km W of Mansfield, Washington · 13311 days ago · -1 km deep · 60 km away
  9. 1.86 km W of Entiat, Washington · 13309 days ago · -1 km deep · 84 km away
  10. 2.26 km ESE of Mansfield, Washington · 13299 days ago · 0 km deep · 66 km away
  11. 1.86 km ESE of Mansfield, Washington · 13299 days ago · 0 km deep · 67 km away
  12. 1.83 km NNW of Waterville, Washington · 13296 days ago · 7 km deep · 79 km away
  13. 1.61 km SE of Entiat, Washington · 13289 days ago · 4 km deep · 82 km away
  14. 1.825 km E of Tonasket, Washington · 13285 days ago · -1 km deep · 66 km away

Before

  1. 2.28 km NNE of Cashmere, Washington · 13341 days ago · 7 km deep · 97 km away
  2. 1.812 km SW of Entiat, Washington · 13342 days ago · 5 km deep · 92 km away
  3. 2.7Washington · 13345 days ago · 0 km deep · 68 km away
  4. 2.38 km WNW of Entiat, Washington · 13354 days ago · -1 km deep · 81 km away
  5. 2.312 km WSW of Tonasket, Washington · 13354 days ago · 9 km deep · 36 km away
  6. 2.15 km WNW of Disautel, Washington · 13363 days ago · -1 km deep · 39 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10258583. Read Sat, Oct 3, 2026, 12:10 AM UTC.