Images

Hot Creek Gorge viewed upstream toward the southwest; the steep walls of the gorge consist of a single rhyolite lava flow erupted from a vent 4 km (2.5 mi) to the south.

Helicopter dropping off monitoring equipment at Mount St. Helens, Washington.

The "spider" (a self-contained portable instrument package) was engineered and deployed during the 2004-2008 eruption of Mount St. Helens to detect and triangulate shallow earthquakes, monitor local ground deformation and uplift, detect lightning that might indicate an ash eruption and low frequency sound from explosions.

U.S. and Canadian two icebreaker collaboration in the Arctic Ocean. Flags flying from CCGS Louis S. St-Laurent.

USGS Pacific Coastal and Marine Science Center’s research vessel R/V Parke Snavely motors on the Nisqually Reach of Puget Sound.

HVO geologists noted persistent spattering in the northeast corner of the lava lake within the Overlook vent during their night-time observations. The view of the lake surface was fairly good because of fume in the area of the Overlook was "thin" at the time.

Incandescence from the lava lake surface (out of view) reflects an awesome glow on the gas plume rising from the lake surface.

Christmas tree worms have made their home on a brain coral. Tropical corals reefs are complex ecosystems, but are rapidly being lost to bleaching and disease, linked to increasing water temperatures.

The Upper monitoring station at Chalk Cliffs, CO.

Mount Bachelor, Oregon viewed from the east.

Hydrothermal explosion at Biscuit Basin in Yellowstone National Park. These types of events are the most likely explosive hazard from the Yellowstone Volcano.

HVO field crews collect temperature data on ground cracks in the Leilani Estates subdivision near the fissure complex. On this day, temperatures ranged from from 100 to 145 degrees C (200 to 300 degrees F), consistent with past readings.

Low dunes on Cape Canaveral often overwash during storm events, transporting sand landward. Critical infrastructure may be buried or flooded. In addition, significant landward transport of sand may lead to extensive shoreline erosion. 

Photo showing turtle tracks leading from a nest on a dune at Cape Canaveral.

The summit plume from Halema‘uma‘u Crater (elevation 3,670 feet), hugs the southeast flank of Mauna Loa as it is blown by the northeasterly trade winds toward the southern point of the Island of Hawai‘i.

Lava from the Pu'u 'Ō'ō-Kupaianaha eruption, active since 1983, enters the ocean on the south flank of Kīlauea Volcano.

Release of water during the 2009 flooding from Jamestown Reservoir, near Jamestown, North Dakota.

Releases from Jamestown Reservoir during 2009 flooding James River near Jamestown, North Dakota.

Children participating in an earthquake drill on April 23, 2009, at the British School in Tokyo, Showa Campus. The drill is based on the Japanese Earthquake Early Warning System.

Children participating in an earthquake drill on April 23, 2009, at the British School in Tokyo, Showa Campus. The drill is based on the Japanese Earthquake Early Warning System.

Kelp greenling fish, about 8 inches long, swims above a seafloor of mixed gravel, cobble, and rock near Half Moon Bay, California.