Volcano Hazards Program Office

Data and Tools

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Date published: August 27, 2020

Silicified wood from around Old Faithful Geyser, Yellowstone National Park

Old Faithful Geyser in the Upper Geyser Basin of Yellowstone National Park is one of the best studied geysers in the world. Under research permit YELL-SCI-8030, samples from 13 silicified tree remnants were collected adjacent to the Old Faithful Geyser cone in April and November 2019. The silicified wood samples were dated using the radiocarbon (14C) method and were analyzed by scanning ele...

Date published: August 27, 2020

Silicified wood from around Old Faithful Geyser, Yellowstone National Park: Scanning Electron Microscopy (SEM)

Silicified wood samples were vacuum impregnated with epoxy, sectioned, and sputter coated with 10 nm Au/Pd at the U.S. Geological Survey, Menlo Park, CA. Samples were imaged in a Tescan VEGA3 Scanning Electron Microscope (SEM) equipped with an Oxford 150 mm2 X-MaxN large area energy dispersive spectrometer at the U.S. Geological Survey, Menlo Park, CA. Backscatter (BSE) im

Date published: August 27, 2020

Silicified wood from around Old Faithful Geyser, Yellowstone National Park: Radiocarbon Dating

Radiocarbon dating of silicified wood was performed at the U.S. Geological Survey’s Radiocarbon Laboratory in Denver, Colorado. All samples were chemically treated using the standard acid-base-acid (ABA) procedure before being combusted online in the presence of excess high-purity oxygen. Water and other contaminant gases were removed using cryogenic separation techniques, and the

Date published: May 1, 2020

Volcanic Gas Measurements at Mount Cleveland, Alaska 2016

On 25 July 2016, helicopter-based measurements were made of the volcanic gases emitted from Mount Cleveland, Alaska, USA. An upward-looking differential optical absorption spectroscopy (DOAS) system was used to measure incident scattered solar ultraviolet radiation while traversing beneath the plume on multiple occasions. These data were used to derive volcanic SO2 emission rates. Addit

Date published: December 17, 2019

Water chemistry data for selected hot springs and rivers in Southwest Yellowstone National Park, Wyoming

Water analyses are reported for 66 samples collected from numerous thermal and non-thermal (rivers and streams) features in the southwestern areas of Yellowstone National Park (YNP) during 2009, 2017, and 2018. Water samples were collected from sources near Boundary Creek, Bechler River, Falls River, Mountain Ash Creek, Upper Snake River, Spirea Creek, and Lewis Lake. Thes

Date published: September 26, 2019

Kīlauea 2018 - lower East Rift Zone eruption and summit-collapse events

This geonarrative summarizes Kīlauea’s 2018 events, highlighting the historical context and contributions to science.

Date published: May 15, 2019

Data repository to "Modeling ash dispersal from future eruptions of Taupo supervolcano", by S.J. Barker et al.

This data release contains supplementary material to the Geochemistry, Geophysics, Geosystems article: "Modeling ash dispersal from future eruptions of Taupo supervolcano", by S.J. Barker et al. This paper uses Ash3d model simulations to calculate the probability of a given tephra-fall thickness from eruptions of the following sizes: 0.1km3, 1 km3, 5 km3, 50 km3, and 5

Date published: April 10, 2019

Sensor data from debris-flow experiments conducted in May, 2017, at the USGS debris-flow flume, HJ Andrews Experimental Forest, Blue River, Oregon

The files consist of two types: tabulated data files and graphical map files. Data files consist of three .csv files, representing three experiment dates (2017_05_23, 2017_05_24, 2017_05_25). Each of these files contains multiple columns of data, with each column representing either a time measurement or the value of a physical quantity measured at that time (e.g., flow depth,

Date published: January 1, 2019

Digital elevation models of Mount St. Helens crater and upper North Fork Toutle River basin, based on 1987 and 1999 airborne photogrammetry surveys Digital elevation models of Mount St. Helens crater and upper North Fork Toutle River basin, based on 1987

The lateral blast, debris avalanche, and lahars of the May 18th, 1980, eruption of Mount St. Helens, Washington, dramatically altered the surrounding landscape. Lava domes were extruded during the subsequent eruptive periods of 1980-1986 and 2004-2008. Nearly four decades after the emplacement of the 1980 debris avalanche, high sediment production persists in the North Fork Toutle R

Date published: January 1, 2019

Hazard zone boundaries from the volcano hazards assessment for the Lassen region, Northern California

This report evaluates the volcano-related hazards, including regional mafic lava flows, silicic lava domes, pyroclastic flows, lahars, and volcanic ash, of the Lassen region, California, which is here defined as an area between the Pit River on the north and the southern limit of active Cascade volcanism, approximately 5 to 10 km south of the southern boundary of Lassen Volcanic

Date published: January 1, 2019

Chemical and isotopic data for thermal and non-thermal features across Yellowstone National Park, v. 2.0

Degassing thermal features at Yellowstone National Park include spectacular geysers, roiling hot springs, bubbling mud pots, fumaroles, frying pans, and areas of passive degassing characterized by steaming ground. Most of these features are readily identified by visible clouds of steam that are occasionally accompanied by a strong “rotten egg” odor from emissions of hydr

Date published: January 1, 2019

Fumarole gas geochemistry and tree-ring radiocarbon data at Mammoth Mountain, California (1989-2016)

Mammoth Mountain is a dacitic dome complex located on the southwestern rim of Long Valley Caldera, California. Mammoth Mountain has exhibited unrest over the past ~30 years, characterized by seismicity over a broad range of depths, elevated 3He/4He ratios in fumarolic gas and large-scale diffuse CO2 emissions. Monitoring of this unrest has included collection of fumarole gas samples fo