Images

Early in the morning on Friday, April 21, two crews of geologists from the Hawaiian Volcano Observatory flew via helicopter into Halema‘uma‘u crater at the summit of Kīlauea to collect geologic samples.

Map of the Mauna Loa 2022 eruptive fissures, shown as red lines. Red shaded area indicates lava flows produced during the eruption, around the fissure vent areas. Solid white line indicates mapped outer caldera boundary. White dotted line indicates inferred outer caldera boundary that is buried by historic Mauna Loa lava flows. Fissures on map were documented by C.

The Hawaiian Volcano Observatory technician team did maintenance on the Hualālai repeater station during the week of April 10, 2023. This photo shows the team walking towards the site, which is an important telemetry hub for Hawaiian Volcano Observatory volcano monitoring data. Mauna Kea and Mauna Loa are visible in the background. USGS image by M. Warren.

A Hawaiian Volcano Observatory technician removes the electronics board on the Hualālai repeater station. The electronics board for the station was replaced with a 48-volt system electronics board as part of a station upgrade. USGS image by C. Parcheta.

A Hawaiian Volcano Observatory scientist drills holes to install a new electronics box for the Hualālai repeater station upgrade. USGS image by M. Warren.

During station maintenance at the Hualālai repeater, Hawaiian Volcano Observatory technicians installed a new webcam, the HLcam. This camera is located on Hualālai and provides view of Mauna Loa's northwest flank.

The lead electronics technician at the Hawaiian Volcano Observatory checks that the new HLcam is transmitting. The HLcam is located on the southeast side of Hualālai and provides views of the northwest flank of Mauna Loa.

Hawaiian Volcano Observatory technicians work on installing a new electronics box on the Hualālai repeater station as part of a station upgrade in April 2023. USGS image by M. Warren.

Hawaiian Volcano Observatory technicians upgraded the Hualālai repeater station to lithium batteries, despite the chilly temperatures on Hualālai. USGS image by M. Warren.

Hawaiian Volcano Observatory technicians install new lithium batteries at the Hualālai repeater station. The station is located at an elevation of 2,160 meters (7,090 feet), on the southeast side of Hualālai. USGS image by M. Warren.

During the week of April 10, Hawaiian Volcano Observatory technicians upgraded the Hualālai repeater site, which is an important telemetry hub for volcano monitoring data. The site is located on the southeast side of Hualālai, at an elevation of 2,160 meters (7,090 feet) above sea level.

A Hawaiian Volcano Observatory technician replaces batteries on the Hualālai repeater station. The station, which relays monitoring signals from nearby stations back the observatory, is powered by batteries that store energy generated by solar panels. USGS image by M. Warren.

Simplified map of the Wyoming Province—a craton composed of Archean-age continental crust. Archean- and Proterozoic-age rocks outcrop in many places within the Wyoming Province and are shown as dark grey blobs. The yellow blob highlights the location of the Hellroaring and Crevice plutons, a small portion of which are exposed in northern Yellowstone National Park.

Map of the northwestern U.S., showing the approximate locations of the Yellowstone hotspot volcanic fields (orange) and Columbia River Basalts (gray).  Boundary of Yellowstone National Park is shown in yellow.  Inset shows physiographic map of southwest Montana and central Idaho.

Simplified geologic map of the Timber Hill basalt and underlying geology in the Sweetwater Hills. The Sweetwater Road is shown by red. Note the basalt flow generally rests on poorly cemented sediments of the Sixmile Creek Formation shown in orange.  Map by Jesse Mosolof (Montana Bureau of Mines and Geology).

USGS scientists work to recover sediment cores from Henrys Lake, Idaho. (Left): geologists traverse frozen Henrys Lake with coring supplies. USGS photo by Sylvia Nicovich, March 30, 2023.  (Right) Geologists lower the corer into the lake through a hole augured through the ice. USGS photo by Chris DuRoss, March 31, 2023.

Frying Pan Lake (also called Waimangu Cauldron), in New Zealand, sits within Echo Crater, which formed during the 1886 eruption of Tarawera.  A hydrothermal explosion from the crater in 1917 resulted in the formation of the hot spring "lake" by 1918.

Isotopic composition of the primary volcanic groups of the Absaroka volcanic province (the Washburn, Sunlight, and Thorofare groups) and two volcaniclastic units, the Sepulcher formation and the Daly formation.

Volcanic deposits associated with the Absaroka volcanic province along the eastern and northern boundaries of Yellowstone National Park. The left panel shows the spread of the Absaroka Volcanic Supergroup (AVS) throughout Wyoming and Montana.

Map of the distribution of pH for thermal pools within Norris Geyser Basin, Yellowstone National Park.  Cool colors are acidic, and warm colors are neutral to slightly basic.  These data were collected and organized using Geographic Information System (GIS) tools. Map by Jefferson Hungerford and Kiernan Folz-Donahue, Yellowstone National Park.

Landsat 8 nighttime thermal infrared image of Yellowstone National Park from January 31, 2023. Satellite-based thermal infrared data show areas on the surface that are warmer versus cooler, and they can be used to estimate surface temperature and the geothermal radiative heat output from the Yellowstone magmatic and hydrothermal system.