Data

Data set consists of scanned seismic drum records recorded at Mount Pinatubo between April 30 and June 17, 1991. The archive contains 145 drum records that recorded seismicity associated with the 1991 eruptions. These drum records are the only continuous seismic records produced from a local network of seismic stations. The images of the drum records are in JPG format.

Over the summer of 2022 the USGS deployed temporary seismometers, infrasound arrays, and cameras along several drainages at Mount Shasta, California. Twenty-one debris flows were confirmed by the cameras or other observations. This data set consists of images from cameras placed near three drainages (Bolam Creek, Mud Creek, and Whitney Creek). Images were stored on internal Secure...

This dataset contains dates, geographic locations, and meteorological data associated with non-eruptive debris flows on Mount Shasta. A non-eruptive debris flow an alternate term for volcanic mudflow or lahar. This dataset was derived from existing scientific literature, historical California newspaper records, and open-access weather and climate data.

40Ar/39Ar geochronologic data presented in this data release are from the Yellowstone Plateau volcanic field, which spans an area that covers parts of Wyoming, Idaho, and Montana. These data were collected to determine the age and distribution of caldera-forming ignimbrite deposits associated with the Yellowstone Plateau volcanic field. These data also include the eruptions ages of lava...

This report provides in-situ major and trace element glass chemistry for three Alaska volcanic samples: (1) ash of unknown provenance deposited on western Alaska in November 1907, collected in Candle, Alaska, in 1908. The sample was discovered in the USGS Alaska Science Center archives as a covered slide prepared by U.S. Geological Survey geologist Edward Kindle. Ash was released from...

The 2024–2026 (ongoing) summit eruption of Kīlauea volcano, Island of Hawaiʻi, has produced lava fountains on a scale unprecedented in the summit caldera since written records began in 1823. By August 2026, 54 episodes of lava fountaining had occurred, with peak heights exceeding 500 meters. Two main vents have been active (north and south), often producing remarkable dual fountains...

The earthquake catalogs begin January 1, 1980. The dataset has been generated using the Advanced National Seismic System (ANSS) Quake Management System (AQMS) tool dbselect, which queries the earthquake catalog in a way that is not possible using the United States Geological Survey Comprehensive Catalog (Comcat). In particular, low frequency earthquakes are not distinguishable from...

This presents the observational chronology of eruptions of Ahyi Seamount. Data include USGS information products released for these eruptions, a summary of plumes of discolored water noted in moderate to high resolution satellite imagery back to 1999, and hydroacoustic detections from the direction of Ahyi Seamount from the Wake Island hydrophone array back to 2015.

The attached file contains complete Bouguer gravity data collected at Kīlauea volcano from 1/5/2023 - 1/26/2023 using a Scintrex CG-6 gravimeter. Overview A Bouguer gravity survey of Kīlauea’s summit was carried out in January 2023 across a grid extending 3 km north, east, and west of the caldera and 6 km to the south (Ruggles and Flinders, 2026). The survey focused on areas with...

This data release contains postprocessed D-Claw model output, simulation configuration, and provenance information for six hypothetical lahar scenarios at Mount Baker, Washington. The modeled scenarios evaluate the influence of landslide source volume and material properties on lahar dynamics, inundation, and runout in the Middle Fork Nooksack River drainage. The numerical simulations...

This dataset contains an updated version of the catalog of tremor in south-central Alaska described in: Wech, A.G., 2016, Extending Alaska’s plate boundary—Tectonic tremor generated by Yakutat subduction: Geology, v. 44, no. 7, p. 587–590. [Also available at https://doi.org/10.1130/G37817.1.] The original catalog spans from 2007 to 2015, and the update extends tremor detection coverage...

This data release contains model output from 640 model simulations of volcanic ash transport during the 26ka Oruanui eruption at Taupo Volcano, New Zealand. The simulations were run as part of a study (Mattin et al., in review) that reports the discovery of Oruanui ash in three ice cores in Antarctica. The simulations helped constrain the set of conditions under which particles of a...