Images

Cracks on a gravel road formed during the reactivation of a slow, deep landslide. The cracks can be indicators of local movement in or around the road or in this case, are a sign of a much larger landslide. 

Cracks on a gravel road formed during the initial movement of a slow, deep landslide. The cracks can be indicators of local movement in or around the road or in this case, a much larger landslide and damaged many homes. 

Large cracks formed in this yard after a large landslide occurred downslope of a home. Though the home wasn't directly impacted by the landslide, the cracks in the yard are indicators of potential additional movement and increased landslide risk.

A reactivated landslide destroyed this home that was built on the landslide. Initial, slow landslide movement allowed the occupant to escape. Island County, WA. March 2013

Photograph of the channel station showing the laser distance meter (in red circle) high above the channel used to measure stage (height) of flow in the channel.

Mt. Rainier with research boat in foreground on lake, Mt. Rainier NP

Toe of the active Cleveland Corral landslide in 2011, perched above US Highway 50 in distance.  Movement typically only occurs during wet winter and spring months.

Shumagin Magnetic Observatory sign. 

The Boulder magnetic observatory. Variations and Proton Sensor buildings at the lower right.

Azimuth mark, Absolutes building and Coil building at Boulder magnetic observatory.

Electronics building at Sitka magnetic observatory Alaska.

Oblique photograph of Knife Ridge monitoring site showing approximate soil pit locations.

Zeiss Jena 010B Theodolite for making absolute measurements at Boulder magnetic observatory.

The Upper monitoring station at Chalk Cliffs, CO.

View of the west channel and Upper monitoring station (Station 1), Chalk Cliffs, CO.

Cable Canyon was burned during the Grand Prix-Old Fire of 2003 and experienced debris flows and floods in response to the December 25, 2003 rainstorm. Two people lost their lives at this site.

USGS and university geologists study the walls of a trench across a recently discovered strand of the Seattle fault.

Fault surface trace of the Hector Mine fault after the October 16, 1999 M7.1 rupture. (Photo by Katherine Kendrick, U.S. Geological Survey)

The Landers fault (red lines at left) and the Hector Mine fault and its aftershocks (red lines and circles at right). The Hector Mine earthquake was a magnitude 7.1, and it produced thousands of aftershocks. 

Hector Mine surface rupture after 1999 earthquake in southern California. 

Predicted Spectral Accelerations by the Youngs et al. (1997) Attenuation Relationship