Nisqually Earthquake
February 28, 2001  10:54 a.m.
M 6.8
Plate Tectonics of the Pacific Northwest
Previous Earthquakes
in the Pacific Northwest and
Puget Sound Region
 
 Landslides and Resultant Flooding
 
 
Landslide destroys home along Cedar River.
 
Landslide near Snoqualmie Falls.
Landslides on Salmon Beach in Tacoma destroyed several homes.
Landslide along Cedar River causes flooding upstream.
 
Liquefaction
 
 
Large sinkhole of approximately 1.5 m diameter found south of the Alaskan Way viaduct.
The diameter of the ejected sand is about 15 m.
(N47.58577° W122.33971°; 03/02/2001)
Sand ejected through a crack perpendicular to the rail tracks. The opening was found to run through the road (Marginal Way) and all the way  into the port facilities seen in the background. 
      (N47.58487° W122.33980°; 03/02/2001)
Sand boils found in Union Pacific train yard. 
(N47.58458° W122.33669°; 03/02/2001)
Liquefied sand ejecta found along centerline of Utah Ave, near cross with Holgate St.
The joint along the centerline seems to have opened approximately
2 cm to 3 cm. 
(N47.58541° W122.33512°; 03/03/2001)
 
 from Bray et al., 2001 - a NSF-PEER sponsored reconnaissance effort
 
 Structural Damage
 
 
Structural damage and vehicle damage in the Pioneer Square district of Seattle.