Images

HVO geologist and helicopter pilot repair a mobile Webcam on Kupaianaha to continue monitoring the east flank of Pu‘u ‘Ō‘ō.

Looking west into Pu‘u ‘Ō‘ō Crater. Recent flows that have spilled out of the perched pond stand out by their silver color. These overflows have built up the crater floor another 5 m (16 ft) since last week. Kane Nui o Hamo, Mauna Ulu, and Pu‘u Huluhulu are in the background.

"The great inflated cylinder of black glass which formed over the sunken island, Aug. 18, 1911" (Frank Perret).

Stream channel cross-section measurements—instrument that uses laser pulses to survey distance to a reflector operated by a second crew member, Mount St. Helens.

Global Positioning System receiver (called a GPS monument) at North Rim Station, a monitoring location at Newberry volcano, Oregon.

August 3 photo showing the collapsed floor within Pu‘u ‘Ō‘ō Crater in the foreground and two lava flow branches each burning some forest—northwest branch to the right and south branch to the left.

Frank Perret's photos from early July 1911 showing the island in the lake at the bottom of a smaller Halema‘uma‘u Crater. The view is looking southwest and the ledge up near the west rim was known as the January 1910 bench, a remnant of an earlier lava level in the crater.

Gas sampling in Sherman Crater, Mount Baker, Washington. Panoramic photograph with USGS scientist in center-left of photo beneath fumarole.

Enthusiastic students during a Mount Rainier Teacher Workshop, Washington.

USGS CVO staff member assisting a teacher with mineral identification during July 2011 Mount Rainer Teacher Workshop.

A Scroll down to the photo taken on June 29 to compare the amount of uplift the floor of the crater has endured in the last month. This photo was taken from a similar spot to the lower right of the three photos posted that day.

View looking south across Newberry caldera towards the Big Obsidian flow (left of center) and Paulina Peak, with Paulina Lake in foreground. Photo taken from the north rim of the caldera.

Gas sampling with a CO2 Infrared Spectrometer at Mount St. Helens' September Lobe lava dome, Washington.

Aerial view looking southwest into Pu‘u ‘Ō‘ō crater with its lava lake (shiny surface) perched 5-8 m above the surrounding lava flows.

Dumping ash cleaned up in Argentina during the PCC eruption in 2011.

Clean up of ash in Argentina following the Puyehue-Cordón Caulle 2011 eruption.

Frank Perret (left) and Thomas Jaggar (right) examine Cone Crater, Kīlauea southwest rift zone, during a return visit by Perret in 1914.

Near-vertical view down into the Overlook vent collapse crater. The partly destroyed visitor overlook is at lower right. The gray surface of the lava lake at the bottom of the pit is faintly visible through fume. North is toward the top of the photo.

A new ocean entry started overnight, fed by a western branch of the active flow. The light gray-colored new flow shows up well in the cloud shadow at left edge of the photo. An eastern branch of the flow continues to advance slowly toward Kalapana Gardens, which is visible at the upper right.

This composite image combines a thermal image with a normal photograph of the coastal plain and pali. The active flow field is split into several lobes, and this image shows the eastern lobe that has been approaching Kalapana Gardens subdivision. Active lava has reached the end of the paved access road, where the County lava viewing area is.

A close-up view of the small ocean entry from the eastern branch of lava flows near Kalapana.