Images

Redoubt Volcano viewed from the northwest following the April 4, 2009 eruption (Event 19). Steam rises from the summit crater, pyroclastic flow and surge deposits drape the flanks, and lahar deposits cover the Drift River Valley. 

From the 2009 eruption of Redoubt Volcano. The original photo can be found at: http://www.avo.alaska.edu/images/image.php?id=17800

Fieldwork northeast of Redoubt volcano. Kristi Wallace measuring and collecting ash samples from the current eruption.

Redoubt volcano with minor ash eruption. Photograph taken during observation and gas data collection flight by AVO staff March 30, 2009.

Nikiski Fire Department on March 28, 2009. Ash fall up to a millimeter thick from Redoubt volcano occurred twice during the 2009 eruption on this area (March 26 and March 28). 

Community engagement and emergency preparedness can mitigate exposure to volcanic events.  Sign at Nikiski Fire Department on March 28, 2009. Ash fall up to a millimeter thick from Redoubt Volcano occurred twice during the 2009 eruption on this area. AVO photo.

This thermal image (white is hot, dark blue is cold), taken during today's helicopter overflight, shows the current vent configuration at Halema`uma`u crater. The vent cavity is about 130 meters (430 ft) wide, and has consumed portions of the wall and floor of Halema`uma`u crater.

With funding from the American Recovery and Reinvestment Act of 2009, The USGS Hawaiian Volcano Observatory recently upgraded its seismic monitoring network.  Here, HVO staff, assisted by an HVO volunteer, installs the solar panel and antenna for one of the upgraded seismic stations on Kīlauea.

A volunteer helps HVO staff complete maintenance on a monitoring site on Kīlauea Volcano.

The degassing lava lake within Halema‘uma‘u at the summit of Kīlauea was a fitting backdrop in 2009 for USGS Hawaiian Volcano Observatory geologist Janet Babb, who later co-produced a video about the summit eruption.

USGS Volcano Disaster Assistance Program Representative (VDAP) Gari Mayberry presents the draft VDAP report to President Kikwete of Tanzania with the Charge d'Affairs Larry Andre.

The village of Naiyobi, about 8 km (5 mi) from the summit of Ol Doinyo Lengai Volcano.

Trunks of forest trees, initially growing on a terrace above the Sandy River (Oregon) at Oxbow Regional Park, were buried by rapid deposition of sediment following a dome-building eruption at Mount Hood in 1781. Erosion during a flood about a week before the photo was taken exposed this "ghost forest".  

Trunks of forest trees, initially growing on a terrace above the Sandy River (Oregon) at Oxbow Regional Park, were buried by rapid deposition of sediment following a dome-building eruption at Mount Hood in 1781. Erosion during a flood about a week before the photo was taken exposed this "ghost forest".  

USGS Scientist Gari Mayberry discusses the volcano hazards in Tanzania with a scientist from the Geological Survey of Tanzania.

Cinder Cone erupted in the year 1666 in the Lassen Volcanic Region of northern California.

Activity at the west Waikupanaha ocean entry, where lava reached the ocean this past weekend, continues. The entry spans about 200 m, with many small lava streams entering the water.

View southwest of Garfield Peak and Eagle Crags above Chaski Bay. Cliffs at caldera rim are andesite of Applegate Peak (unit aa; ca. 210-270 ka), overlain by two thin flows of andesite of Garfield Peak at top center (unit ag; 224 ±9 ka). Talus rests on flat top of massive slide block that consists of altered lavas of units aa, ak(?), and db(?).

Morning aerial view looking northwest up the valley of Sun Creek. Applegate Peak caps the prominent rock wall of the west side of Sun Notch at the caldera rim. Northwest caldera wall is visible on opposite side of Crater Lake through Sun Notch. Grayback Ridge in foreground is thick lava of pre-Mazama rhyodacite (410-460 ka).

Medicine Lake lies within the shallow basin of Medicine Lake caldera. Glass Mountain flow, draped over the east side of the volcano, is the youngest lava flow at the volcano. The northeasternmost dacite tongue extends nearly to the bottom of the photo (distal lobes are outlined to enhance visibility).

Side-by-side comparison of the northwest wall of Kīlauea Caldera on a clear day (left) and a day with thick vog (right). HVO observation tower and building can be seen near the center in each photo.