Data
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Campaign GNSS Measurements Collected at Three Sisters by the Cascades Volcano Observatory Campaign GNSS Measurements Collected at Three Sisters by the Cascades Volcano Observatory
This data release contains data collected during campaign Global Navigation Satellite Systems (GNSS; formerly only the Global Positioning System or GPS) surveys conducted at Three Sisters. A survey in any given year may contain data from a subset of established sites depending on site access, personnel, and the condition of the GNSS monument. For each site, we include raw data in binary...
Campaign GNSS measurements on the Island of Hawaiʻi collected by the Hawaiian Volcano Observatory in 2023 Campaign GNSS measurements on the Island of Hawaiʻi collected by the Hawaiian Volcano Observatory in 2023
This release includes data collected during campaign GNSS surveys at Kīlauea and Mauna Loa Volcanoes on the Island of Hawaiʻi in 2023. It includes data from a total of 57 sites occupied from January 1 to December 31, 2023. For each site, we include its measured raw data in daily files, Receiver INdependent EXchange (RINEX) files for each day, field log sheet(s), and associated metadata...
Olivine core and rim electron microprobe analyses for the January-March 2023 Halema‘uma‘u eruption of Kīlauea Olivine core and rim electron microprobe analyses for the January-March 2023 Halema‘uma‘u eruption of Kīlauea
The January-March 2023 Halema‘uma‘u eruption occurred within Kaluapele (Kīlauea’s summit caldera) beginning on January 5 and ending on March 7 (Mulliken et al. 2024). This eruption reoccupied a previously active vent in the western side of the lava lake, as well as opening additional new vents on the eastern side of the lake. Field crews from the U.S. Geological Survey’s Hawaiian Volcano
Olivine core and rim electron microprobe analyses for the September 2023 Halema‘uma‘u eruption of Kīlauea, Island of Hawai‘i Olivine core and rim electron microprobe analyses for the September 2023 Halema‘uma‘u eruption of Kīlauea, Island of Hawai‘i
The September 2023 Halema‘uma‘u eruption began on September 10 and ended on September 16 (~1 week; Mulliken et al. 2024). Field crews from the U.S. Geological Survey’s Hawaiian Volcano Observatory collected tephra samples from fissures that had opened up on an area of the caldera floor east of Halema‘uma‘u crater (see Lynn et al. 2024 for map). Air quenched spatter and tephra samples...
Oblique aerial photography and videography of the August 10, 2025 Tracy Arm landslide and tsunami, southeast Alaska Oblique aerial photography and videography of the August 10, 2025 Tracy Arm landslide and tsunami, southeast Alaska
On 10 August 2025, a landslide in Tracy Arm, southeast Alaska, approximately 95 km southeast of Juneau, generated a tsunami with regional effects. Because of poor weather, low visibility, and inaccessible conditions in the water, little was immediately known about the landslide or the total extent and magnitude of the tsunami. On Wednesday, 13 August 2025, USGS scientists Cyrus Read and...
Paleomagnetic data from Kīlauea volcano, Island of Hawaiʻi Paleomagnetic data from Kīlauea volcano, Island of Hawaiʻi
This dataset includes paleomagnetic analyses of lava samples from Kīlauea volcano, Island of Hawaiʻi. Analyses were performed using a cryogenic magnetometer in Menlo Park, California, USA. The data were collected as part of fundamental geologic mapping of the Southwest Rift Zone, East Rift Zone, summit, and south flank regions of Kīlauea volcano, Island of Hawaiʻi. These data (when...
Campaign GNSS measurements on the Island of Hawaiʻi collected by the Hawaiian Volcano Observatory in 2025 Campaign GNSS measurements on the Island of Hawaiʻi collected by the Hawaiian Volcano Observatory in 2025
This release includes data collected during campaign GNSS surveys at Kīlauea and Mauna Loa volcanoes on the Island of Hawaiʻi in 2025. It includes data from a total of 46 sites occupied from January 1 to August 15, 2025 (see note below). For each site, we include its measured raw data in daily files, Receiver INdependent EXchange (RINEX) files for each day, field log sheet(s), and...
Olivine core and rim electron microprobe analyses for the June 2023 Halema‘uma‘u eruption of Kīlauea, Island of Hawai‘i Olivine core and rim electron microprobe analyses for the June 2023 Halema‘uma‘u eruption of Kīlauea, Island of Hawai‘i
The June 2023 Halema‘uma‘u eruption began on June 7 and ended on June 19 (~2 weeks; Mulliken et al. 2024). Field crews from the U.S. Geological Survey’s Hawaiian Volcano Observatory collected frothy pumice clasts from initial high fountaining on 7 June 2023 from accessible regions southwest of Kaluapele (Kīlauea’s summit caldera). Samples were collected from within a publicly closed area...
Campaign GNSS measurements on the Island of Hawaiʻi collected by the Hawaiian Volcano Observatory in 2024 Campaign GNSS measurements on the Island of Hawaiʻi collected by the Hawaiian Volcano Observatory in 2024
This release includes data collected during campaign GNSS surveys at Kīlauea, Mauna Loa, and Hualālai volcanoes on the Island of Hawaiʻi in 2024. It includes data from a total of 63 sites occupied from January 1 to December 31, 2024. For each site, we include its measured raw data in daily files, Receiver INdependent EXchange (RINEX) files for each day, field log sheet(s), and associated...
Simulations of tephra fall from Popocatépetl and Nevado de Toluca Volcanoes Simulations of tephra fall from Popocatépetl and Nevado de Toluca Volcanoes
This data release contains results of 6,000 simulations of volcanic ashfall from eruptions at Popocatépetl and Nevado de Teluca volcanoes in Mexico. From each model simulation, the deposit thickness was recorded at the location of a sediment core from Lake Chalco on the southeast edge of Mexico City (19.25718N, 98.97549W). These results are reported in the accompanying paper: Hodgetts, A...
Tiltmeter data from Kīlauea stations (ESC, IKI, JKA, KAE, POC, SDH, UWD) from January 1 to June 30, 2025 Tiltmeter data from Kīlauea stations (ESC, IKI, JKA, KAE, POC, SDH, UWD) from January 1 to June 30, 2025
Tiltmeter data from Kīlauea stations (ESC, IKI, JKA, KAE, POC, SDH, UWD) from January 1 to June 30, 2025. These data were collected in 2025 by Andria P. Ellis of the USGS Hawaiian Volcano Observatory.
Deposit componentry and tephra grain shape data by dynamic-imaging analysis of the Kulanaokuaiki Tephra Member of the Uwēkahuna Ash, Kīlauea volcano, Island of Hawai‘i Deposit componentry and tephra grain shape data by dynamic-imaging analysis of the Kulanaokuaiki Tephra Member of the Uwēkahuna Ash, Kīlauea volcano, Island of Hawai‘i
Tephra samples from the Kulanaokuaiki Tephra Member (400 to 1000 C.E.) of the Uwēkahuna Ash (200 B.C.E. to 1000 C.E.) were sampled from Kīlauea volcano, Island of Hawai‘i. Samples were analyzed by dynamic imaging analysis using Microtrac CAMSIZER P4 and X2 instruments for grain shape and Anton nitrogen pycnometer instruments for density in the U.S. Geological Survey - Hawaiian Volcano...