Images

Haleakala National Park.

Sunrise over Haleakala National Park.

Haleakala National Park.

Haleakala National Park.

Haleakala National Park.

Mongoose trap.

This tadpole shows signs of severe Perkinsea infection, which causes organ failure. 

This tadpole shows signs of a severe Perkinsea infection. 

Moose lying in the snow amongst the trees.

Example of wellhead plumbing typical of public wells sampled in a USGS study of 932 public wells nationwide. About 105 million people—or more than one-third of the Nation's population—receive their drinking water from one of the 140,000 public water systems across the United States that rely on groundwater pumped from public wells.

Landslide debris on the west fork of the Gakona Glacier. Note helicopter on right for scale! View to east.

The Denali fault offset crevasses on the Canwell Glacier.

Fault trace on Gakona Glacier. Tracks are from where geologists measured the fault offset.

View northward of mountain near Gillette Pass showing sackung features. Here the mountaintop moved downward like a keystone, producing an uphill-facing scarp. The main Denali fault trace is on the far side of the mountain and a small splay fault is out of view below the photo.

Right steps in the Denali fault trace on the Canwell Glacier caused large rhombehedral chasms to form. Patty Craw in background. This photo was on the front page of the Anchorage Daily News.

Helicopters and satellite phones were integral to the geologic field response. Here, Peter Haeussler is calling a seismologist to pass along the discovery of the Susitna Glacier thrust fault. View is to the north up the Susitna Glacier. The Denali fault trace lies in the background where the two landslides can be seen.

View south along the Trans Alaska Pipeline in the zone where it was engineered for the Denali fault. The fault trace passes beneath the pipeline between the 2nd and 3rd slider supports at the far end of the zone. A large arc in the pipe can be seen in the pipe on the right, due to shortening of the zigzag-shaped pipeline trace within the fault zone.

Peter Haeussler measures offset of the Susitna Glacier thrust fault.

The Susitna Glacier thrust fault southwest of the toe of the Susitna Glacier. The rolled over tundra reflects the fault trace.

Surface faulting split this tree near the Trans Alaska Pipeline.

Patty Craw, DGGS, stands in front of the Susitna Glacier thrust fault. The November 3 earthquake started with an M7.2 earthquake along this fault.