Images

An HVO geologist conducts a routine high-precision survey of the inactive lava lake in Halema‘uma‘u, at the summit of Kīlauea volcano. Mist moving across the caldera on the morning of July 22 produced a rainbow over the lake. No significant changes have occurred in Halema‘uma‘u in recent weeks. USGS photo by M. Patrick.

An HVO scientist samples the gas around a crack identified as emitting elevated levels of carbon dioxide (a volcanic gas) on the down-dropped block within Kīlauea caldera. The sample will later be analyzed to determine its complete chemical composition. This work was conducted within a closed area of Hawai‘i Volcanoes National Park, with park permission.

HVO scientists walk transects along the down-dropped portion of Kīlauea caldera floor as part of a gas survey conducted on July 22.

On July 22, HVO scientists surveyed the floor of the down-dropped block within Kīlauea caldera for ​diffuse volcanic gas emissions. This particular part of the caldera floor subsided during Kīlauea's collapse events in 2018.

Photographs from a sandhill crane (Antigone canadensis) found dead in Indiana, U.S.A.  (A) There is a firm mass on the right cranial hock with a roughened black and tan surface. (B) On cut section, the mass is gelatinous, mottled light pink to gray, and extends to the joint space (arrow).

Photomicrographs from a sandhill crane (Antigone canadensis) found dead in Indiana, U.S.A.  (A) The mass is composed of islands of well-differentiated chondrocytes separated by fibrovascular connective tissue. There is minimal cellular pleomorphism and no mitotic figures are seen (inset).

Dave Zawada (left) and Gerry Hatcher prepare to deploy the SQUID-5 off the R/V Sallenger over Looe Key, FL.

Visible and thermal infrared images of Yellowstone acquired on July 17, 2021.  In the visible image, Landsat 8 channels 4-3-2 are assigned red-green-blue colors (respectively) to simulate natural color.  In thermal infrared image, bright pixels are warmer, and dark pixels are cooler.  The full satellite images are clipped to the boundaries of Yellowst

This close-up view of the western fissure within Halema‘uma‘u at the summit of Kīlauea was captured on Friday, July 16, 2021. HVO scientists were making a routine observational visit to the crater rim; no changes to the inactive lava lake were detected.

Seismogram from station YTP in Yellowstone National Park showing earthquakes from the swarm beneath Yellowstone Lake that began late on July 15, 2021. Each row represents 30 minutes of seismic data.

The Mojave River is the largest of the streams and rivers that flow through southwestern San Bernardino County, CA. It extends more than 100 miles east from its source in the San Bernardino Mountains to the end east of Afton Canyon. This 3D animation takes the viewer on a tour of the entire length of the river.

Scientists RC Mickey and Dave Thompson from the USGS St.

Gerry Hatcher controls SQUID-5 image acquisition over Looe Key Sanctuary Preservation Area (SPA). 

Scientists RC Mickey and Dave Thompson from the USGS St.

Once thought to be extinct, the Pacific pocket mouse (Perognathus longimembris pacificus) was rediscovered in 1993 and is currently found at three population sites along the southern California coast.

Scanning electron microscope image of elongate amphiboles, some of which are asbestiform, collected from attic insulation from Libby, Montana. 

Marcus G. Langseth departs Newport, Oregon (Yaquina Bay) for Cascadia Project OBS Deployment Leg

Geologic block-diagram and conceptual model of possible flow systems associated with thermal areas at Mammoth Hot Spring (MHS) area from Sorey (1991) (USGS Water-Resources Investigations Report 91-4052).  Also shown are the Bear Creek Hot Springs (BC) and La Duke Hot Spring (LD).

An acoustic Doppler current profiler (ADCP) on the Natchaug River near Chaplin, CT (USGS station 01120790).

A Hawaiian Volcano Observatory geologist uses a laser rangefinder to survey points across the solidified lava lake surface in Halema‘uma‘u, at the summit of Kīlauea. No significant changes in lake surface elevation have been observed in recent weeks. USGS photo by M. Patrick taken on July 9, 2021.

Decreasing water levels in the southern arm of the Great Salt Lake expose microbialite communities that are normally underwater.