Images

A close-up view of the Kilauea pond shows the color variations across the surface, and sharp boundaries among zones of different color.

Comparison of the water pond in Halema‘uma‘u on November 20, 2019, and March 1, 2020. Camera and lens same for both photos. Since November 20, 2019, the pond deepened 10 m (33 ft) and widened more than 50 m (164 ft) east-west and 30 m (98 ft) north-south. Circled clusters of rocks did not move between photos, evidence of slope stability.

Thomas A. Jaggar, shown at his desk circa 1925, founded the Hawaiian Volcano Observatory in 1912 and served as its Director until he retired in 1940.

An HVO scientist tests a colorimeter instrument on the water lake within Halema‘uma‘u, at Kīlauea's summit. Colorimetry is the measurement of the wavelength and intensity of light. USGS photo by M. Patrick. 

A pack string crossing the Yellowstone River in the remote Thorofare region. National Park Service photo courtesy of Sherrie and Ron White, August 21, 2016.

Imperial Geyser hot spring pool in Yellowstone National Park is about 30 m (about 100 ft) across and contains alkaline-Cl waters with a steam vent in the pool and mudpots outside the pool area (in the upper right part of this photo). USGS Photo by Pat Shanks, 2019.

Visitors in the busy Old Faithful area. National Park Service photo by Neal Herbert, May 27, 2017.

Map of roads in the Greater Yellowstone Ecosystem. Source: Yellowstone Spatial Analysis Center.

Field observations today show that the diameters of the crater lake within Halema‘uma‘u at the summit of Kīlauea are about 94 m (308 ft) north-south and around 192-195 m (630-640 ft) east-west. Too much steam at the west end interfered with measurements this morning.

On January 17, 2020, USGS-HVO scientists and DOI Unoccupied Aerial System (UAS) team members collected three additional samples of water from the Halema‘uma‘u crater lake. Here, the sampling device and temperature logger were readied for takeoff. The plastic sleeve was attached to the UAS (drone) with a cord about 20 feet (6 m) long.

GeoGirls Geology and Technology Field Camp 2020

A typical section of shoreline in the Kapoho area, formed by thick toothpaste lava that originated from Fissure 8 during the 2018 eruption. USGS photo by M. Zoeller.

Schematic diagram of the magmatic system underneath Yellowstone caldera and the processes leading to a "shadow zone".

Cascades Volcano Observatory Open House May 9, 2020

Map showing ice cover in the Yellowstone region. Light shaded areas bounded by black and red lines indicate areas covered during the Pinedale (about 20,000-15,000 years ago) and Bull Lake (about 150,000 years ago) glaciations, respectively. Blue lines are contours in thousands of feet on the maximum reconstructed Pinedale glacier surface.

A digital elevation map of Yellowstone National Park (left) with the location of Yellowstone Lake indicated by the white box. Satellite image (right) of the study site with collection location of core YL16-2C shown by the red circle. Map was originally published in Sabrina Brown’s dissertation (2019).

Summary diagram of the geological record and timing of the Huckleberry Ridge Tuff eruption. See Swallow et al. (2019) for more details.

Sabrina Brown collecting samples from Yellowstone Lake core YL16-2C at the National Lacustrine Core Facility (LacCore) at the University of Minnesota.

An unnamed small acidic (pH ~3) hot spring (with a temperature of about 55°C at the source) in the Gibbon Geyser Basin of Yellowstone National Park. The yellow region is due to the precipitation of sulfur by sulfide-oxidizing chemotrophic microorganisms.

ANNIMATED GIF: This animated image file (GIF) of the Kīlauea summit water lake is a cropped version this file, showing a close-up view of the lake.

A sample of the digital elevation model from the 2019 LiDAR survey of Kīlauea, showing the vicinity of the former HVO office and Jaggar Museum in Hawaiʻi Volcanoes National Park.