Washington earthquakes

M1.6 earthquake 8 km NW of Lofall, Washington

A magnitude 1.6 earthquake struck 8 km NW of Lofall, Washington on Sat, Apr 9, 1988, 4:51 AM PDT (11:51 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M2.5 2 km WSW of Artondale, Washington. This one was a foreshock.

Lofall 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
1.6 (md), micro
Local time
UTC
1988-04-09 11:51:37 UTC
Depth
17.6 km (10.9 mi), shallow
Epicenter
47.857° N, 122.745° 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 0.5 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
70°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 1.65 km SW of Inglewood-Finn Hill, Washington · 14043 days ago · 18 km deep · 39 km away
  2. 1.84 km NE of Tanner, Washington · 14037 days ago · 12 km deep · 88 km away
  3. 1.73 km ENE of Granite Falls, Washington · 14035 days ago · -1 km deep · 67 km away
  4. 1.61 km W of Wauna, Washington · 14022 days ago · 24 km deep · 53 km away
  5. 2.52 km WSW of Artondale, Washington · 14004 days ago · 21 km deep · 63 km away
  6. 2.29 km S of Sultan, Washington · 14002 days ago · 13 km deep · 68 km away
  7. 1.81 km WSW of Riverton, Washington · 14001 days ago · 25 km deep · 53 km away
  8. 1.57 km SSW of Lyman, Washington · 13999 days ago · -1 km deep · 83 km away
  9. 1.52 km S of Issaquah, Washington · 13996 days ago · -1 km deep · 66 km away
  10. 2.23 km ESE of Belfair, Washington · 13993 days ago · 21 km deep · 47 km away

Before

  1. 2.81 km W of Wauna, Washington · 14053 days ago · 22 km deep · 53 km away
  2. 2.96 km SW of Lyman, Washington · 14057 days ago · 1 km deep · 84 km away
  3. 1.810 km NW of Swede Heaven, Washington · 14064 days ago · -1 km deep · 88 km away
  4. 1.71 km SW of Erlands Point-Kitsap Lake, Washington · 14071 days ago · 16 km deep · 30 km away
  5. 2.04 km SW of Inglewood-Finn Hill, Washington · 14071 days ago · 19 km deep · 39 km away
  6. 1.54 km WSW of Artondale, Washington · 14073 days ago · 24 km deep · 63 km away
  7. 1.84 km WSW of Chico, Washington · 14074 days ago · 15 km deep · 29 km away
  8. 1.612 km WNW of Orcas, Washington · 14077 days ago · 16 km deep · 92 km away
  9. 2.02 km ESE of Cathcart, Washington · 14079 days ago · 22 km deep · 50 km away
  10. 1.81 km SW of Erlands Point-Kitsap Lake, Washington · 14080 days ago · -1 km deep · 30 km away
  11. 2.55 km WSW of Darrington, Washington · 14080 days ago · 2 km deep · 91 km away
  12. 1.72 km WNW of Lake Marcel-Stillwater, Washington · 14081 days ago · 25 km deep · 62 km away
  13. 3.92 km WNW of Puyallup, Washington · 14081 days ago · 64 km deep · 81 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10229608. Read Tue, Sep 29, 2026, 9:18 AM UTC.