Images

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.

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.

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).

Vog obscures view during slack or no tradewinds at the summit of Kīlauea Volcano, Hawai‘i

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).

UNAVCO engineers drilling a borehole for instrument installation (left). Aerial view of borehole casing used to protect instruments from the elements found below the surface (right).

Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64

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.

HVO geologist downloads images collected with infrared cameras set up on the rim of Halema‘uma‘u Crater. The cameras are aimed at an erupting lava lake to conduct a thermal survey of the lake's surface.

Seismologist installing equipment at station NED on Mount St. Helens, Washington. Mount Rainier in distance.

Sulfur flow (darker gray area) on an altered ground surface at Brimstone Basin, Yellowstone Lake in background.

Gas flows up, appearing to boil, through the water of Alluvium Creek, Brimstone Basin, Yellowstone. Large funnel is used to trap gas, which is then sent to a collection bottle through the tubing.

Gas flux measurement being taken over altered ground at Brimstone Basin, Yellowstone.