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Strontium isotope ratios of lavas from Hawaiʻi were analyzed by thermal ionization mass spectrometry (TIMS) at the Southwest Isotope Research Laboratories of the U.S. Geological Survey (USGS) in Denver. There were at total of 427 analyses of samples obtained from the field, the collections of the USGS Hawaiian Volcano Observatory (HVO), the University of Hawaiʻi, and the Smithsonian Institution. The samples originated from Kīlauea (historical and prehistoric summit and rift zone lavas), Mauna Loa (historical lavas), and Lōʻihi (submarine lavas of unknown age). Data for associated reference materials are described in the process steps. The Sr isotope ratios may be used to test models for the magmatic plumbing system...
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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 and extent of the flow on 35 different dates. The dataset also contains (3) an attributed polyline shapefile with features that represent the eruptive fissures associated with this episode of the eruption and the principle ground cracks that were occupied by lava during lava flow emplacement, and (4) an attributed polyline shapefile with features representing the mapped...
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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 volcanoes and includes a wide variety of different types of lava flows and at least two explosive eruptions that produced widespread fallout. Compared to those of a typical Cascade stratovolcano, eruptive vents at MLV are widely distributed, extending 55 km north-south and 40 km east-west. The total area covered by MLV lavas is >2,000...
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Forty years of geologic investigations at the Nevada Test Site (NTS)have been digitized. These data include all geologic information that:(1) has been collected, and(2) can be represented on a map within the map borders at the mapscale is included in the map digital coverages.
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This digital publication contains all the geologic map information used to publish U.S. Geological Survey Open-File Report 2007-1089 (Sherrod and others, 2007). This geologic map shows the distribution and stratigraphic relation of volcanic, intrusive, and sedimentary units emplaced in the past 8 million years across the eight principal islands of the Hawaiian archipelago, State of Hawaii, U.S.A.
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This web map service is updated as data is available to show ongoing developments of the 2018 lower East Rift Zone eruption of Kīlauea Volcano, Island of Hawai‘i. These data are preliminary and represent estimated locations for lava flow boundaries, eruptive fissures, and noneruptive ground cracks shown as polygons, lines, and points, respectively. Also included are historic Kīlauea lava flows from 1840, 1955, 1960, and 2014-2015 as purple shaded areas, and paths of steepest decent in blue. The web service can be found at https://www.sciencebase.gov/catalog/item/5afe0ba7e4b0da30c1bdb9db and https://gis.usgs.gov/sciencebase2/rest/services/Catalog/5afe0ba7e4b0da30c1bdb9db/MapServer. Users may download the source...
This product includes rose diagrams and tables of wind patterns at volcanoes listed in the Smithsonian Institution’s Volcanoes of the World Database. At each volcano, the speed and direction of wind above the volcano were read from output of the NCEP/NCAR Reanalysis 1 model, at twice-daily intervals from January 1, 1990 to December 28, 2009. These results were then plotted as 20 wind rose diagrams, divided into four seasons and five elevation intervals, and as one summary plot for year-round winds at 0-5 km elevation above sea level. Rose petals indicate the downwind direction of the wind vector. These rose diagrams are wrapped into a single zip file for each volcano. Also included in the zip file are five...
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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 5–10 km south of the southern boundary of Lassen Volcanic National Park. Most active volcanism occurs in a zone about 40 km wide between Viola on the west and the eastern boundary of Caribou Wilderness Area, but sparser volcanism in the west extends the width of this zone to about 75 km. All vents and deposits known or estimated to be less than 100,000 years are identified and considered in establishing...
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The California volcano locations, threat rank and hazard zones data release contains two shapefiles for download or use as a web map service. The California Volcanic Center Locations shapefile was created to provide a generalized location of volcano hazard sources. The California Volcano Hazard Zones shapefile was created from previously published hazard zone reports. Specific details about each file can be found in the metadata included with each file and the read-me document for this data release. Together, these files were used to define California Volcano Hazards for the GIS analysis that supports conclusions in the California's exposure to volcano hazards report. Geologists produce hazard zone maps to convey...
Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Alpine County, Ash, Ballistic, Butte County, California, All tags...
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Strontium isotope ratios of historical Kīlauea summit and rift lavas were analyzed by thermal ionization mass spectrometry (TIMS) at the Southwest Isotope Research Laboratories of the U.S. Geological Survey (USGS) in Denver. There were 151 analyses of 49 samples obtained from the field, the collections of the USGS Hawaiian Volcano Observatory (HVO), and the Smithsonian Institution. Data for associated reference materials are described in the process steps . The Sr isotope ratios may be used to test models for the volcano’s magmatic plumbing system.


    map background search result map search result map Geochronology and geology of late Oligocene through Miocene volcanism and mineralization in the western San Juan mountains, Colorado Geologic map of the State of Hawaii Digital Geologic Map Database of the Nevada Test Site Area, Nevada Preliminary map of the 2018 lower East Rift Zone eruption of Kīlauea Volcano, Island of Hawai‘i Strontium isotope ratios of lavas from Kīlauea Volcano, Hawaiʻi Hazard boundaries for the volcanic hazard assessment of Medicine Lake volcano, California Hazard zone boundaries from the volcano hazards assessment for the Lassen region, Northern California California volcano locations, threat rank and hazard zones Strontium isotope ratios of lavas from Kīlauea, Mauna Loa, and Lōʻihi Volcanoes, Hawaiʻi GIS shapefiles for the June 27th lava flow at Kīlauea volcano, Hawaiʻi, June 2014–June 2016 Hazard boundaries for the volcanic hazard assessment of Medicine Lake volcano, California GIS shapefiles for the June 27th lava flow at Kīlauea volcano, Hawaiʻi, June 2014–June 2016 Geochronology and geology of late Oligocene through Miocene volcanism and mineralization in the western San Juan mountains, Colorado Hazard zone boundaries from the volcano hazards assessment for the Lassen region, Northern California Strontium isotope ratios of lavas from Kīlauea Volcano, Hawaiʻi Digital Geologic Map Database of the Nevada Test Site Area, Nevada Strontium isotope ratios of lavas from Kīlauea, Mauna Loa, and Lōʻihi Volcanoes, Hawaiʻi Preliminary map of the 2018 lower East Rift Zone eruption of Kīlauea Volcano, Island of Hawai‘i Geologic map of the State of Hawaii California volcano locations, threat rank and hazard zones