Images

This photo is from within the crater, looking back at the USGS scientist who took the adjacent photo.

USGS scientists make observations from the edge of Pu‘u ‘Ō‘ō's current crater. Pu‘u ‘Ō‘ō's high point - the northwestern remnant of the original cone that formed in the 1980's - is in the background. This higher ground provides a good perch for some of HVO's webcams, near upper right.

View of Pu‘u ‘Ō‘ō crater, looking south. The floor of the crater was resurfaced yesterday (August 27) by lava flows erupting from a vent at the northeast edge of the crater (fuming area to the left).

View of Pu‘u ‘Ō‘ō from the south side, looking north. The current crater in Pu‘u ‘Ō‘ō is only about half the diameter of Pu‘u ‘Ō‘ō's previous crater, which is defined by the rim of the tephra cone remnants in the foreground and background. That older crater's western edge extended to about the left edge of the photograph.

A piece of the new flow on the crater floor was collected for chemical analysis. Can you spot the USGS geologist collecting the sample? He is just below the center of the photograph. The small lava pond is just above center, partly hidden by a small spatter mound.

Divers prepare patterns of known targets for verification of sonar resolution.

A tiny lava pond, about 10 m (33 ft) across, was visible within a vent near the south edge of Pu‘u ‘Ō‘ō's crater. Can you spot it? It's near the center of the photograph.

This map shows recent changes to Kīlauea's active East Rift Zone lava flow field. The area of the flow on August 5 is shown in pink, while widening and advancement of the flow as of August 26 is shown in red. The yellow lines show the active lava tube system. Pu‘u ‘Ō‘ō lava flows erupted prior to June 27, 2014, are shown in gray.

Two of three lava flows that raced down the southwest slope of Mauna Loa on June 2, 1950, are shown here. As lava entered the ocean, steaming water marked its offshore course. A semicircular area of hot, turbulent water killed many fish that were seen drifting on currents or washing up on shore over the next few days. Photo courtesy of U.S. Air Force.

Scientists, civil authorities, and emergency managers from Chile and the U.S. met in California to discuss the challenges of effective volcanic hazard education, response planning, hazard mitigation, and risk reduction, as part of the second Bi-national Exchange program for Volcanic Risk Reduction in the Americas.

This volcanic-gas monitoring station installed at Mount St. Helens consists of weather monitoring equipment and sensors for measuring the concentrations of water vapor (H2O), carbon dioxide (CO2), sulfur dioxide (SO2), and hydrogen sulfide (H2S) in volcanic gas plumes.

View from the OR35 bridge over the White River looking downstream. Glistening areas are deposits from recent debris flows.

The overflow of Halema‘uma‘u Crater on February 23, 1918. Photo by T.A. Jaggar from the HVO Record Book courtesy of Bishop Museum.

Mount Hood Spectrograms for August 21, 2015.

Sediment-laden White River 11 km downstream of the OR35 bridge. Heavy rains resulted in high-sediment loads within this river, which drains Mount Hood, Oregon.

USGS Hawaiian Volcano Observatory geophysicist Ingrid Johanson measures gravity with a gravimeter on the slope of Mauna Loa with Mauna Kea visible in the background. USGS photo.

Dr. Seth Moran at USGS-Cascades Volcano Observatory

This map shows recent changes to Kīlauea's active East Rift Zone lava flow field. The area of the flow on July 23 is shown in pink, while widening and advancement of the flow as of August 5 is shown in red. The yellow lines show the active lava tube system. Pu‘u ‘Ō‘ō lava flows erupted prior to June 27, 2014, are shown in gray.

This small-scale map shows Kīlauea's active East Rift Zone lava flow in relation to the eastern part of the Island of Hawai‘i. The area of the flow on July 23 is shown in pink, while widening and advancement of the flow as of August 5 is shown in red.

Volcanic ash deposit at base of Uwēkahuna Bluff below Jaggar Museum. Photo by T.A. Jaggar on July 29, 1913. Ash deposit buried by lava flow in 1919. Standing man is circled. From HVO Record Book courtesy of Bishop Museum.

Lava flows are scattered across a broad area extending from about 3 to 8 km (2-5 mi) northeast of Pu‘u ‘Ō‘ō. The active flows start just above the horizontal mid-line of the photo, but cannot be picked out easily within the broader inactive flow field due to their distance away in this photo.