Images

Map showing the minimum area covered by volcanic ash from eruptions of Valles Ca

HVO staff visited the summit of Mauna Loa on foot to repair the webcam. The weather was perfectly clear, and views of the caldera floor showed nothing unusual.

Serapeum, a Roman Marketplace in Pozzuoli, Italy, records deformation of Campi Flegrei caldera over two millennia. It was built above sea level about 2000 years ago, but mollusk borings on the large marble columns indicate that it subsided by 7 meters (23 feet) below sea level before being uplifted above sea level once more in the past several hundred years.

The USGS collaborates with NASA, the University of Florida, National Park Service, and the U.S. Fish and Wildlife Service to assess coastal erosion hazards affecting space program infrastructure, habitat, and wildlife populations.

Yellow Creek at Knox, IN - control under bridge

Yellow Creek at Knox, IN - downstream view of the channel

USGS geologists Dave Foster and Wayne Baldwin and Andrew Green (University of
KwaZulu-Natal) observe coastal hazards on the Lower Cape, Massachusetts.

A USGS employee takes a wading measurement of streamflow on Leidy Creek at Togwotee Pass. Bear tracks on the fresh snow and seven grizzlie sightings were a good reminder to be bear-aware when taking measurements in this area.

Yellow Creek near Oak Grove, IN - Fall foilage

Waning fall foliage as seen on a rural Adirondack road during the Western Adirondack Stream Survey (WASS) conducted in November, 2018. Photo by Scott George

East Fork Whitewater River at Richmond IN - downstream view

HVO scientists inspect a seismic station on Mauna Loa to evaluate for a possible equipment upgrade in the near future.

Hawaiian Volcano Observatory field crews establish a new MultiGAS volcanic gas monitoring station on the south side of Kīlauea Volcano's caldera. Currently, sulfur dioxide emission rates from the summit remain low. The station will collect data to track emission rates and concentrations over time. Photo by Frank Younger.

HVO scientists measure a GPS instrument to ensure its stability during a multi-day deployment in the Kahuku Unit of Hawai‘i Volcanoes National Park.

This is a view of the summit area from the southwest, showing the collapsed area of Halema‘uma‘u and the adjacent caldera floor. A section of Crater Rim Drive preserved on a down-dropped block is visible at the far right.

USGS scientists are documenting the distribution of three mid-sized mammalian carnivores – or mesocarnivores –in the Klamath Network Parks using remote cameras and hair snares.

What is next for Kīlauea Volcano? This is a view of the summit area from the southwest, showing the collapsed area of Halema‘uma‘u and the adjacent caldera floor. A section of Crater Rim Drive preserved on a down-dropped block is visible at the far right.

Digital Surface Model (DSM) and orthomosaic image from the October 23, 2018 UAS survey.

Photo shows USGS geologists obtaining microfossil and biomarker samples from the Calvert Formation at Scientists Cliffs. 

Wayne Baldwin (USGS, far right) with students and staff from Stockton University getting ready to deploy the miniSEABOSS off the R/V Petrel during the geological sampling survey in October 2018.

Earthquakes (red dots) track the progression of the magmatic intrusion from Kīlauea Volcano's middle East Rift Zone to the lower East Rift Zone between April 30 and May 3, 2018. Orange triangles show the locations of fissure 1 (right), which erupted on May 3, and Pu‘u ‘Ō‘ō (left).