Washington earthquakes

M1.8 earthquake 4 km NE of Tanner, Washington

A magnitude 1.8 earthquake struck 4 km NE of Tanner, Washington on Sun, Apr 24, 1988, 12:06 PM PDT (19:06 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M3.1 2 km NE of Lake Marcel-Stillwater, Washington. This one was a foreshock.

Tanner 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), micro
Local time
UTC
1988-04-24 19:06:57 UTC
Depth
12.4 km (7.7 mi), shallow
Epicenter
47.500° N, 121.694° 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 1.3 km horizontally, 1.0 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
134°
Stations used
14

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 7 in the 30 days before it.

After

  1. 1.73 km ENE of Granite Falls, Washington · 14037 days ago · -1 km deep · 68 km away
  2. 1.524 km ENE of Ashford, Washington · 14030 days ago · -1 km deep · 71 km away
  3. 1.61 km W of Wauna, Washington · 14023 days ago · 24 km deep · 74 km away
  4. 1.519 km SSE of Carbonado, Washington · 14020 days ago · 11 km deep · 67 km away
  5. 2.52 km WSW of Artondale, Washington · 14006 days ago · 21 km deep · 76 km away
  6. 1.511 km S of Greenwater, Washington · 14005 days ago · 0 km deep · 50 km away
  7. 2.29 km S of Sultan, Washington · 14003 days ago · 13 km deep · 32 km away
  8. 1.81 km WSW of Riverton, Washington · 14002 days ago · 25 km deep · 46 km away
  9. 1.52 km S of Issaquah, Washington · 13997 days ago · -1 km deep · 25 km away
  10. 2.23 km ESE of Belfair, Washington · 13995 days ago · 21 km deep · 82 km away
  11. 1.63 km NNE of Union Hill-Novelty Hill, WA · 13993 days ago · 3 km deep · 33 km away
  12. 1.812 km NE of Packwood, Washington · 13988 days ago · 1 km deep · 90 km away
  13. 1.92 km WNW of Maple Valley, Washington · 13987 days ago · 18 km deep · 31 km away
  14. 3.12 km NE of Lake Marcel-Stillwater, Washington · 13986 days ago · 7 km deep · 28 km away
  15. 1.514 km W of Entiat, Washington · 13983 days ago · 0 km deep · 100 km away
  16. 1.712 km ESE of Ashford, Washington · 13983 days ago · 5 km deep · 86 km away
  17. 2.21 km SW of Lake Marcel-Stillwater, Washington · 13981 days ago · -1 km deep · 27 km away
  18. 1.51 km E of Clyde Hill, Washington · 13979 days ago · 24 km deep · 40 km away

Before

  1. 1.65 km SW of Inglewood-Finn Hill, Washington · 14045 days ago · 18 km deep · 49 km away
  2. 1.68 km NW of Lofall, Washington · 14053 days ago · 18 km deep · 88 km away
  3. 2.81 km W of Wauna, Washington · 14054 days ago · 22 km deep · 74 km away
  4. 1.516 km SW of Snoqualmie Pass, Washington · 14054 days ago · 10 km deep · 24 km away
  5. 1.86 km NW of Cliffdell, Washington · 14061 days ago · -1 km deep · 71 km away
  6. 1.917 km N of Cashmere, Washington · 14061 days ago · 0 km deep · 95 km away
  7. 1.810 km NW of Swede Heaven, Washington · 14066 days ago · -1 km deep · 95 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10231153. Read Wed, Sep 30, 2026, 10:41 PM UTC.