Images

An HVO geologist walks along the summit trail, with Mauna Kea in the background.

HVO geologists made a routine visit to the webcam monitoring Halema‘uma‘u. No changes were observed in the pit, but views were hampered by poor weather and thick fog.

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.

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.

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.

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

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

Two video cameras overlook the coast from atop a windmill tower in Unalakleet, Alaska where they look westward over Norton Sound. This is a snapshot taken from one of the cameras.

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

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.

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).

Maps displaying the stages of evolution of the more recent cycle of volcanism associated with Yellowstone Caldera. From Finn and Morgan, 2002 (High-resolution aeromagnetic mapping of volcanic terrain, Yellowstone National Park).

Color-shaded topographic relief map of the Yellowstone Plateau-Snake River Plain volcanic province showing the track of the Yellowstone hot spot. Figure by Ken Pierce and Lisa Morgan.

“The ocean is the closest I can get to an unexplored world, without going into space... I mean, I feel a deep connection to the ocean and its constant rhythms, but when I visit, there's a new discovery or appreciation every time.

The sun rises at Mount St. Helens (pictured in the distance), with low-level clouds covering Coldwater Lake. The view is from the Coldwater Science and Learning Center, the site of the 2018 GeoGirls field camp program.

Coastal Change Storm Hazard Team map created Tuesday, 10/89/18 showing current forecasted beach erosion, overwash and inundation effects of Hurricane Michael's predicted landfall in the Florida Panhandle. Forecast will change with subsequent National Hurricane Center forecasts.

This thermal map was constructed by merging about 1300 images from a morning helicopter overflight, and shows the distribution of some of the prominent thermal features in the caldera. The most conspicuous area is a region of high temperatures in the deepest part of the collapse depression, in the area of Halema‘uma‘u.

NAGT summer intern, Kelly Sanks, prepares to collect salt marsh sediment cores with her advisor, Dr. Meagan Gonneea (Cape Cod, MA).

Only small amounts of sulfur dioxide (SO2) and hydrogen sulfide (H2S) are currently being released from Kīlauea, but they chemically react with each other (oxidation-reduction reaction) to form the bright yellow sulfur deposits visible on the crater walls within Halema‘uma‘u.