Nisqually Earthquake, Washington February 28, 2001

Photo 1 Earth slide and flow at site of preexisting active landslide approximately 1 km northwest of Snoqualmie Falls. Debris from the slide temporarily dammed Tokul Creek located below Highway 202.

Photograph taken March 2, 2001 by Alan Chleborad of the U.S. Geological Survey.

Photo 2 Toe of landslide debris that temporarily dammed Tokul Creek northwest of Snoqualmie Falls.

Photograph taken on March 2, 2001 by Alan Chleborad of the U.S. Geological Survey.

Photo 3 Rex Baum of the U.S. Geological Survey documents incipient landslide and related ground cracks along Highway 202 approximately 1 km northwest of Snoqualmie Falls.

Photograph taken on March 2, 2001 by Alan Chleborad of the U.S. Geological Survey.

Photo 4 Close-up photograph of ground crack related to incipient landslide along Highway 202 northwest of Snoqualmie Falls.

Photograph taken March 2, 2001 by Alan Chleborad of the U.S. Geological Survey.

Photo 5 Ground crack along River St.adjacent to the Snoqualmie River in Snoqualmie, Washington. Ground failure at this and another location in Snoqualmie resulted in ruptured water mains and temporary loss of the towns water supply.

Photograph by Alan Chleborad of the U.S. Geological Survey. Photograph was taken on March 2, 2001.

Photo 6 Close-up photograph of ground crack along River St. in Snoqualmie, Washington. Ground failure resulted in ruptured water mains that depleted the town's water supply.

Photograph by Alan Chleborad of the U.S. Geological Survey.

Photo 7 Telephoto view of part of the west face of Mt. Si near North Bend, Washington.

Photograph by Rex Baum of the U.S. Geological Survey.

Photo 8 In this photograph, Rex Baum of the U.S. Geological Survey is seen taking GPS readings beside Highway 2 where settlement and cracking occurred on the east abutment of a bridge over the Skykomish River.

Photograph taken on March 3, 2001 by Alan Chleborad.

Photo 9 View of part of the west face of Mt. Si near North Bend, Washington. The light colored exposures on the rock face in the middle and left center areas of the photograph were reportedly source areas of rock fall triggered by the Nisqually earthquake of February 28, 2001.

Photograph by Alan Chleborad of the U.S. Geological Survey. Photograph was taken on March 2, 2001.

Photo 10 Source area of Rock fall on Highway 2 approximately 2 km southeast of Index, Washington. Rockbolt in upper right of photograph is one of several that were installed sometime prior to the Nisqually earthquake to help stabilize the rock face.

Photograph by Alan Chleborad.

Photo 11 Amount of ground settlement near the east abutment of Highway 2 bridge over the Skykomish River, east of Gold Bar, Washington, is indicated by recently exposed portion of guardrail post.

Photograph taken on March 3, 2001 by Alan Chleborad of the U.S. Geological Survey.

Photo 12 Rock fall along Highway 2 approximately 2 km southeast of Index, Washington. Rock at the site appears highly fractured and jointed. Joint planes dipping toward the highway probably contributed to the instability.

Photograph by Rex Baum of the U.S. Geological Survey taken on March 3, 2001.

Photo 13 Rock fall on steep road cut (Highway 7) approximately 1 km southeast of LaGrande, Washington. The deposit included blocks of rock up to 1 m across.

Photograph was taken March 4, 2001 by Alan Chleborad of the U.S. Geological Survey.

Photo 14 Shallow landslide on steep slope near Highway 12 approximately 0.5 km west of Randle. The slide occurred in a thin soil layer on underlying volcanic rock. The slide scar is approximately 2-m wide.

Photograph taken by Alan Chleborad of the U.S. Geological Survey on March 4, 2001.

Photo 15 Rock fall along Highway 2 approximately 2 km southeast of Index, Washington. Rock at the site appears highly fractured and jointed. Joint planes dipping toward the highway probably contributed to the instability.

Photograph by Alan Chleborad of the U.S. Geological Survey taken on March 3, 2001.

Photo 16 Rock fall on south side of Cline Road a few kilometers southeast of Randel, Washington. Large boulder shown in photograph downed the tree to the left and skinned the bark off several others as it fell from the 60m-high cliff. The boulder (approximately 2 m x 1.5 m x 1.5 m) was the largest of those deposited near the roadway.

Photograph taken by Alan Chleborad of the U.S. Geological Survey on March 4, 2001.

Photo 17 Caption will be added later.

Photograph taken by Alan Chleborad of the U.S. Geological Survey.

Photo 18 Caption will be added later.

Photograph taken by Rex Baum of the U.S. Geological Survey