Volcano Hazards Program Office

Data and Tools

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Date published: January 1, 2019

Data release for results of societal exposure to California's volcanic hazards

The U.S. Geological Survey, California Volcano Observatory (CalVO) in collaboration with the State of California Governor’s Office of Emergency Services and the California Geological Survey, are working to understand the State’s exposure to volcanic hazards by integrating volcanic hazard information with geospatial data on at-risk populations, infrastructure, and resou

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

Date published: January 1, 2019

Repeat microgravity data from Kilauea Volcano, Hawaii

These data are microgravity measurements collected at the summit of Kilauea Volcano, Hawaii. Data are collected using multiple instruments, with each file representing measurements from a specific instrument during a specific time period. The data dictionary explains the file format and contents, and the dataset will be updated as new measurements are collected.

Date published: January 1, 2019

Water level, temperature, and chemistry in a deep well on the summit of Kilauea Volcano, Hawaii

Kilauea, on the Island of Hawaii is one of the world’s most active volcanoes and it hosts one of the densest volcano monitoring networks. A deep well on the southwest rim of Kilauea’s caldera, often referred to informally as the “NSF Well” or the “Keller Well” was drilled in 1973 to a depth of 1,262 meters from an elevation of 1,103 meters.

Date published: January 1, 2019

GIS shapefiles for the June 27th lava flow at Kīlauea volcano, Hawaiʻi, June 2014–June 2016

This dataset contains shapefiles and associated metadata showing evolution of the "June 27th" lava flow (Puʻu ʻŌʻō eruptive episode 61e) that was active at Kīlauea volcano from June 27, 2014, to June 8, 2016. The dataset contains (1) an attributed polyline shapefile and (2) an attributed polygon shapefile with features that represent the outline

Date published: January 1, 2019

Volcanic hazard boundaries from the volcanic hazard assessment of Medicine Lake volcano, California

Medicine Lake volcano (MLV) is a very large shield-shaped volcano located in northern California where it forms part of the southern Cascade Range of volcanoes. It has erupted hundreds of times during its half-million-year history, including nine times during the past 5,200 years, most recently 950 years ago. This record represents one of the highest eruptive frequencies among Cascade v

Date published: January 1, 2018

Isopach, lithic isopleth, and pyroxene, Fe-Ti oxide, and plagioclase geochemistry data for the Orange Tuff, West Java, Indonesia

The Orange Tuff is an informally named tephra-fall deposit that crops out extensively in the volcanic highlands to the south and southwest of Bogor, West Java, Indonesia. The data included in this data release documents the deposit thickness and maximum sizes of lithics present at sites throughout its distribution. Additional tables document dispersal areas calculated from within hand-drawn...

Date published: January 1, 2018

Volcanic ash leachate data from increased 2018 activity at Kilauea Volcano, Hawaii

This dataset includes volcanic ash leachate, catchment and rainwater chemistry for samples collected between May-June 2018.

Date published: January 1, 2018

Gravity and physical property data of the northern Harrat Rahat, Saudi Arabia

The datasets include gravity measurements and anomalies and physical property measurements of the northern Harrat Rahat, Saudi Arabia.

Date published: January 1, 2018

GIS shapefiles for lava flows at Kilauea volcano, 1790–1982

This dataset contains shapefiles and associated metadata for lava flows erupted at Kilauea volcano from ca. 1790 through 1982. The dataset includes all known subaerial eruptions in the volcano's Southwest Rift Zone and East Rift Zone, and selected flows erupted within the summit caldera, during this time period. Two attributed shapefiles are associated with each eruption: a polyline shape

Date published: January 1, 2018

SO2 emission rates from Kilauea Volcano, Hawaii (2014-2017)

This report documents the SO2 emission rates for the period 2014-2017, from the summit and East Rift Zone eruptions of Kīlauea, along with the wind or plume speed and direction data used to calculate the emission rates. The Kīlauea summit SO2 emission rates are reported every ten seconds, as measured by a novel configuration of 10 fixed, upward looking UV spectrometers (FLYSPE

Date published: January 1, 2018

Groundwater levels and temperatures in well CH-10b near Hot Creek, Long Valley Caldera, eastern California

Hot Creek Gorge contains the most obvious surface expression of the hydrothermal system in Long Valley Caldera, California, discharging 200-300 L/s of thermal water according to USGS measurements made since 1988. Formerly, Hot Creek was a popular public swimming area, but it was closed in 2006 due to unpredictable temperature fluctuations and sporadic geysering of thermal water within t