Images

Skylight in lava tube carrying lava from ‘Alae crater onto to Kīlauea's south flank, October 21, 1970. For much of 1970 and into 1971, lava flowed through a tube from Mauna Ulu into a complex lava lake in 'Alae Crater. The lake built natural levees, which allowed lake level to rise much higher than the old crater rim.

These spires developed on the surface of the lava fill in the crater. Since there was a fissure active in the crater on April 9, 1970, it is uncertain if these spires were true hornitos or were fed from the fissure.

A burping driblet spire (hornito) in 'Alae Crater on May 20, 1970. In volcanology, a hornito is a rootless vent developed on, and fed by, a lava flow or lake. There was no recognized deeper vent in 'Alae Crater, so this feature is probably a real hornito.

Today ‘Ālo‘i is unrecognizable except by keen observers.

The only surviving segment of the fissure system active on the first day of the eruption. View looks west and shows the fissure segments, stepping right, and spatter rampart along right (uphill) side of the segments. No spatter rampart formed on the downhill (left) side of the segments, because falling spatter was carried away by lava flows.

Mount Adams, aerial view from the south. The A.G. Aiken Lava Bed lava flow is seen in the lower center of the photo, which erupted since the last glaciation.

Mount Adams from the southwest near Trout Lake, Washington. Foreground surface is a 300 year old lahar deposit that originated from high on the flank of the volcano, which deposited house-sized block.

Seismic monitoring station ASR at Mount Adams, Washington. Scientist conducting routine maintenance.

Graphical abstract of the new research paper. The scientists collect samples from the rocks forming near hot springs and geysers. They dissolve small amounts of the rock in acid and organic carbon (created by living organisms) remains behind.

Temphra sampling done by Kristi Wallace.

Photograph of new mobile telemetry trailer for the Cascades Volcano Observatory (CVO). The purpose of the trailer is to provide a communication link in the event that CVO needs to respond to a Cascade volcanic crisis at a volcano that is currently under-monitored (includes all Cascade volcanoes except Mount St. Helens).

Backscattered electron image of radiating fibers of kaolinite growing in volcanic rock altered by fluids connected to hot springs near Lassen Volcanic National Park. Associated with the kaolinite are rounded masses of silica and iron oxides (bright areas) that formed from pyrite. The composition and textures help us evaluate the origin of ore deposits and

Harrat Lunayyir basalt cinder cones and lava flows in Saudi Arabia seen from an aerial perspective. Deposits from the cinder cones cover nearby ridges and form fans at the base of the older non-volcanic ridge in the background. These well-preserved geomorphic forms indicate the relative youth of this northern part of the volcanic field.

Mount Hood, Oregon, viewed from the northwest at Lost Lake.

Time lapse of January 17, 2010, earthquake swarm on Madison Plateau, Yellowstone National Park.

Rim of Kilauea Volcano.

Silicified logs of Queen's Laundry bathhouse

 HVO scientist measures the episode 12 lava fountain height at Mauna Ulu from Puʻu Huluhulu on Dec 30, 1969. The Mauna Ulu eruption marks its 51^st anniversary on May 24, 1969.

Tilted slabs of welded spatter blanketed by pumice and spatter erupted on October 20 and, mainly December 30, 1969. Note the contrast between the chaotic terrain in the foreground and the undisturbed bedding in tephra in background. The chaotic area formed as moving lava upended the tephra beds. Photo taken in March 1970.

Viewing platform for visitors on rim of Mauna Ulu crater. March 22, 1973. This platform, established in 1972, was open to the public until late on the night of November 4, 1973. Then rising lava level prompted closure, and lava engulfed the platform early the next morning.

Fallout on flank of Pu'u Huluhulu from inclined fountain of October 20, 1969. The high vertical fountain was briefly diverted toward Pu'u Huluhulu when a blockage developed at the vent. Observers at the viewing platform (on the left-most peak on the skyline) scrambled to escape, but after several minutes the fountain righted itself.