Data

In the late evening of November 27, 2022, an effusive eruption began inside Moku'aweoweo caldera at the summit of Mauna Loa volcano. Within a few hours, lava had covered most of the caldera floor, and several fissures just outside caldera sent short lava flows up to 3 kilometers (2 miles) to the southwest. Later in the morning of November 28, summit effusion ceased and the eruption moved into the

Tiltmeter data from stations BLB, MCC, MLO, MOK, and SLC from January 1 to December 31, 2021.

Tiltmeter data from stations BLB, MCC, MLO, MOK, and SLC from January 1 to December 31, 2022, spanning the Mauna Loa 2022 eruption and unrest.

These data are geochemical analyses of Earthquake Flat Pyroclastics pumice and phase equilibria experiments.

Isotopic compositions (87Sr/86Sr, 143Nd/144Nd, 176Hf/177Hf, 206Pb/204Pb, 207Pb/204Pb, 208Pb/204Pb) and major oxide and trace element concentrations of Quaternary basalts, hawaiites, mugearites, benmoreites, and trachytes from northern Harrat Rahat, Kingdom of Saudi Arabia.

Gas chemical and isotopic compositions are reported for samples collected from 9 volcanic and geothermal areas in California: Medicine Lake Volcano, Mount Shasta, Lassen Volcanic Center, Clear Lake Volcanic Field, Mono Lake Volcanic Field, Long Valley Caldera, Mammoth Mountain, Coso Volcanic Field, and Salton Sea Geothermal Field. Beginning in 2014, gas samples were collected as part of the USGS C

The 2.1 Ma Clear Lake Volcanic Field (Donnelly-Nolan and others, 1981) and the 174 km2 Clear Lake are located ~150 km north of San Francisco, California. Sulphur Bank Mercury Mine (SBMM) is an abandoned mine located on the eastern shore of Clear Lake that was initially worked in 1865 for sulfur, then for mercury until it closed in 1957 (White and Roberson, 1962). The mine was declared a Superfund

The geologic map database in this data release is a reproduction of the U.S. Geological Survey Professional Paper 1762: Volcanic Processes and Geology of Augustine Volcano, Alaska, Waitt and Begét (2009). The database consists of a geologic map and one structural cross section that conform to the National Geologic Map Schema (GeMS). These data supersede USGS Data Series 677: Database for Volcanic

Between April and August 2009 four water samples were collected from the outflow channel of Old Faithful Geyser in the Upper Geyser Bain, Yellowstone National Park. The samples were collected during the main phase of the eruptions when water flow was at maximum rate. In addition, two samples of stream flow were collected in November 2016 from the Firehole River near the U.S. Geological Survey gagi

Kilauea volcano (Hawaii, USA) is a shield volcano that exhibits both effusive and explosive eruptive activity. Although Kilauea has been predominantly built through effusive eruptions, explosive eruptions have occurred repeatedly at both Kilauea's summit and in the volcano's lower East Rift Zone (Moore, 1992; Swanson et al., 2014). This dataset presents geochemical analyses of samples from Kapoho

This data release contains materials related to the spheroid90gp software package, including pre-trained Gaussian Process emulators and model input files. The emulators predict cavity compressibility and surface displacements produced by pressure changes in a vertical spheroidal cavity embedded in an elastic halfspace. The methodology is documented in a journal publication ("Computationally effici

There are 161 active volcanoes in the U.S. and its territories. These volcanoes pose differing degrees of risk to people and infrastructure because of differences in their eruptive styles and geographic locations. This layer shows the areas near volcanic vents that could be affected by proximal volcano hazards, including ballistics (airborne rocks from explosions), pyroclastic density currents, la