Images

The Big Thompson River is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

A USGS Colorado Water Science Center field crew installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

A USGS Colorado Water Science Center field crew (Bob Brandle, Cory Stevens, Matt Nicotra, and Kevin Scofield) installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo.

A USGS Colorado Water Science Center field crew (Bob Brandle, Cory Stevens, Matt Nicotra, and Kevin Scofield) installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo.

A USGS Colorado Water Science Center field crew (Bob Brandle, Cory Stevens, Matt Nicotra, and Kevin Scofield) installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo.

A USGS Colorado Water Science Center field crew installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River off Highway 119 near Longmont, Colo. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

A USGS Colorado Water Science Center field crew (Bob Brandle, Cory Stevens, Matt Nicotra, and Kevin Scofield) installs a temporary streamgage and takes streamflow and water level measures on the St. Vrain River near Longmont, Colo.

Mount Scott fire lookout tower near Crater Lake, Oregon. Tower houses seismic and deformation monitoring instruments.

Matt Nicotra and and Kevin Scofield assess the flood status of the St. Vrain River off of Highway 119 near Longmont, Colo. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

Flooding from the St. Vrain River near Longmont, Colo., damaged portions of Highway 119, closing sections of the highway off from traffic. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

Geologists examine tephra deposits to better understand the early eruptive behavior of the Medicine Lake Volcano, evidence of which can be found as far away as central Oregon.

Bob Brandle and Cory Stevens of the USGS Colorado Water Science Center record streamflow and water level measurements for the flooded St. Vrain River near Longmont, Colo. The river is one of many that flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages.

Photo taken by Jonathan Godt, USGS Geologic Hazards Team. Monday, Sept. 16. Landslide at northwest flank of Twin Sisters Peak near Rocky Mt. National Park.

This bridge is at 75th Street east of Boulder showing Boulder Creek at flood stage (5000 cfs) on Friday, September 13, 2013. When looking west (upstream), the USGS streamgage is on the right.

This flooded culvert is located on Monarch Road just east of the Diagonal Highway in Boulder, Colo.

Numerous rivers flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages. In response, USGS field crews measured flood flows, made gage repairs, and assessed sites to replace those gages destroyed. 

Numerous rivers flooded during a significant September 2013 rain event along Colorado's Front Range, damaging or destroying several USGS streamgages. In response, USGS field crews measured flood flows, made gage repairs, and assessed sites to replace those gages destroyed. 

Algae along nearshore at Chimney Beach, Lake Tahoe.

Glacier Peak volcano viewed from the west, Washington.

The Kahauale‘a 2 flow is fed from a spatter cone on the northeast edge of Pu‘u ‘Ō‘ō's crater. Today, this spatter cone, which is about 6 m (20 ft) tall, was weakly spattering from it top.

Early morning view of Pu‘u ‘Ō‘ō, looking toward the southwest. The fume rising from the bottom of the photo marks the trace of the lava tube carrying lava to the Kahauale‘a 2 flow front.