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Redoubt Volcano following April 2009 eruption
Polar bear female and two cubs on the Beaufort Sea, Alaska
Conducting lake surveys on the Kenai Peninsula, Alaska
Greater White-fronted Goose on the North Slope of Alaska
Regions L2 Landing Page Tabs
4-week time-lapse photography of the shoreline of Lake 31 in NPR-A, coastal Arctic Alaska, demonstrates erosion mechanisms during July, 2008
4-week time-lapse photography of the Arctic coast at Drew Point, AK shows mass wasting of the coastal sediments in July, 2008
4-week time-lapse photography of the Arctic coast at Drew Point, AK shows intense coastal erosion in early July, 2008
A drill rig at the Mount Elbert test site in Alaska's North Slope, just west of Prudhoe Bay. USGS joined BP Exploration (Alaska) and the U.S. Department of Energy to drill a test well to study natural gas production from gas hydrate deposits. Read more about the Mt. Elbert project...
The first priority of any eruption is to assess current status and what might happen next. To accomplish this, Mount St. Helens became one of most heavily monitored volcanoes. At the start of the 2004–08 eruption, 13 permanent seismic stations operated within about 12 miles of Mount St. Helens. By the end of the eruption, the seismic network consisted of 20 stations....
Throughout the eruption, scientists installed monitoring stations to track volcanic activity, deployed temporary monitoring ""spiders"", monitored the temperature of lava spines and created time-lapse of dome growth. During the 3+ years of the eruption, lava piled up to form a new dome 460 m (1,500 ft) high. The 92 million cubic meters (121 million cubic yards, or 36,800...
A gas plume arising from Augustine Volcano during it's eruptive phase 2005-06. This photo was taken during a FLIR/maintenance flight on January 24, 2006.
Lava spines continue to emerge onto the crater floor of Mount St. Helens in 2005. By April 2005, spine 4 is broken and pushed away by spine 5. The nearly vertical spine 5 has a smooth, gouge-covered surface, growing at an average rate of 4.3 meters per day. Scientists continue helicopter overflights to measure the temperature of the lava dome and assess hazards from dome...
Growth and disintegration of lava spines continued at Mount St. Helens through the first 8 months of 2005. Rather than building a single dome-shaped structure, the new dome grew initially as a series of recumbent, smoothly surfaced spines that extruded to lengths of almost 500 m. The potential for unpredictable explosions induced decisions to minimize the exposure of field...
Within the crater of Mount St. Helens, the 2004–2008 lava dome grew by continuous extrusion of degassed lava spines. To track growth and anticipate what the volcano might do next, scientists installed monitoring equipment, including a camera and gas sensing instruments, and made helicopter overflights to collect the temperature (FLIR) of the growing dome.
Compilation video of significant events from the dome-building eruption at Mount St. Helens, from October 1, 2004 to March 15, 2005, including steam and ash eruptions, growth of lava spines, helicopter deployment of monitoring equipment, collection of lava samples, and FLIR thermal imaging of rock collapse on lava dome.
- Eruption of Mount St. Helens, October 1