Images

The Kahauale‘a 2 flow extends to the north and northeast of Pu‘u ‘Ō‘ō. From the edge of the flow, where it first reaches the forest, Pu‘u ‘Ō‘ō still appears to tower above the surrounding plain.

The Kahauale‘a 2 flow extends to the north and northeast of Pu‘u ‘Ō‘ō. From the edge of the flow, where it first reaches the forest, Pu‘u ‘Ō‘ō still appears to tower above the surrounding plain.

Active breakouts on the Kahauale‘a 2 are scattered over a broad area. Here, a breakout near the edge of the forest engulfs trees and burns dead foliage.

Active breakouts on the Kahauale‘a 2 are scattered over a broad area. Here, a breakout near the edge of the forest engulfs trees and burns dead foliage.

This beautiful bubble of glass, about the size of an small orange, adorns the surface of a breakout on the Kahauale‘a 2 flow. Note the delicate bubble walls stretched so thin that they grade from the color of honey to transparent.

The lava lake in Halema‘uma‘u has fallen slightly over the past few weeks. It is now about 55 m (180 ft) below the surrounding crater floor.

The Kahauale‘a 2 flow is fed from a spatter cone, shown here, on the northeast edge of Pu‘u ‘Ō‘ō's crater floor. The spatter cone is about 8 m (26 ft) high.

The Kahauale‘a 2 flow extends to the north and northeast of Pu‘u ‘Ō‘ō. From the edge of the flow, where it first reaches the forest, Pu‘u ‘Ō‘ō still appears to tower above the surrounding plain.

Active breakouts on the Kahauale‘a 2 are scattered over a broad area. Here, a breakout near the edge of the forest engulfs trees and burns dead foliage.

This beautiful bubble of glass, about the size of an small orange, adorns the surface of a breakout on the Kahauale‘a 2 flow. Note the delicate bubble walls stretched so thin that they grade from the color of honey to transparent.

The lava lake in Halema‘uma‘u has fallen slightly over the past few weeks. It is now about 55 m (180 ft) below the surrounding crater floor.

The lava lake in Halema‘uma‘u has fallen slightly over the past few weeks. It is now about 55 m (180 ft) below the surrounding crater floor.

This beautiful bubble of glass, about the size of an small orange, adorns the surface of a breakout on the Kahauale?a 2 flow. Note the delicate bubble walls stretched so thin that they grade from the c

All Hawaii residents are encouraged to participate in the Great Hawaii ShakeOut earthquake drill at 10:17 a.m. on October 17, 2013.

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.

The USGS Big Thompson River at Loveland streamgage, pictured here, was damaged during the September 2013 Colorado flood event. USGS crews installed a temporary streamgage nearby to compensate for the lag in data.

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

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.

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.

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.

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.