Images

GOES antenna at Deadhorse geomagnetic observatory.

Main building at Deadhorse geomagnetic observatory.

Main building at Deadhorse geomagnetic observatory.

Main building at Deadhorse geomagnetic observatory in summer.

Fluxgate sensor at Deadhorse geomagnetic observatory.

Absolutes pier at Deadhorse geomagnetic observatory.

Large patches of Cladophora, a green algae, lining the shore of Lake Michigan. Accumulation of Cladophora in shoreline waters is believed to be linked to avian botulism outbreaks, which have recently increased in the Great Lakes.

Mount Rainier Teacher's Workshop group photo, July 2010, Washington.

Professor Michael Ort (Northern Arizona University) and graduate student Joel Unema examine deposits from the 2008 eruption of Okmok volcano in Alaska as part of their research to reconstruct the complex history of the eruption.  Dr.

Page from Plan Your Trip to Mount Rainier, an outreach activity used during a teacher workshop.

Pinnacles formed in Mazama pyroclastic flow deposit as erosion revealed fumarole chimneys that formed shortly after 7,700 ka eruption released gas, Crater Lake.

Crater Lake panorama seen from the lake's southern shore. Wizard Island is cone in western portion of lake. Oregon

Lava fountains up to 20 m (65 ft) high erupted from fissures on the north flank of Mauna Loa early Sunday morning, July 6, 1975. USGS photo.

On July 6, 1975, eruptive fissures opened along Mauna Loa

The lava pond resides deep within the vent cavity in Halema‘uma‘u, at a depth of about 180 m (200 yards). Photograph taken from the former Halema‘uma‘u Overlook on June 20, 2010.

Colorado-native Rio Grande Cuttroat Trout salvaged after Medano Creek wildfire, Great Sand Dunes National Park, Colorado.

Medano Creek after wildfire. 

A small rootless shield is forming on the upper flow field over the breakout point of the Quarry flow, the flow that has been feeding the ocean entry for the past several weeks. The shield is approximately 10-15 m (yards) high. This photo was taken looking SSW, with the upslope direction to the right.

Pacific Tsunami Warning Center building.

Seismic station VALT in Mount St. Helens crater, view toward the south.

The recent activity within Pu`u `Ō `ō crater quieted over the past several days. This photo shows the new, dark-colored lava that covered the crater floor. A new gas vent on the east wall of the crater (top left) also appeared over the couple of weeks.