Images

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

Top: The global tectonic regions modified from García et al. (2012), with each region shown in a different color. Bottom: The productivity parameter (a-value) and temporal decay parameter (p-value) for each global tectonic regime shown as a “+” with uncertainty shown by the line of matching color. Figures from Page et al. (2016).

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. 

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

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

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.

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. 

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

Hector Mine surface rupture after 1999 earthquake in southern California. 

Photograph showing a house that was damaged by a 1997 landslide along Perkins Lane in Seattle, Washington.

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

Photograph showing the scar left by a landslide on a hillside above the Burlington Northern Santa Fe Railway in Everett, Washington.

The "Ring of Fire", also called the Circum-Pacific belt, is the zone of earthquakes surrounding the Pacific Ocean- about 90% of the world's earthquakes occur there. The next most seismic region (5-6% of earthquakes) is the Alpide belt (extends from Mediterranean region, eastward through Turkey, Iran, and northern India.

An oceanic spreading ridge is the fracture zone along the ocean bottom where molten mantle material comes to the surface, thus creating new crust. This fracture can be seen beneath the ocean as a line of ridges that form as molten rock reaches the ocean bottom and solidifies.