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Filters Date Types (for Date Range) Types OGC WFS Layer (3) OGC WMS Service (3) Contacts U.S. Geological Survey Angie K Diefenbach U.S. Geological Survey - ScienceBase Patricia A Nadeau Volcano Science Center Natural Hazards Laura Clor Categories Data (1) Tag Types Theme (3) Place (3) USGS Scientific Topic Keyword (2) Harvest Set (2) Tag Schemes None (2) USGS Thesaurus (2) ISO 19115 Topic Category (2) Common geographic areas (1) View Results as: JSON ATOM CSV

Airborne lidar survey of St Vincent, Eastern Caribbean, following the 2020-21 eruption of La Soufrière Volcano La Soufrière Volcano is a 1,220 m high stratovolcano that occupies the northern half of the island of St. Vincent, Lesser Antilles, Eastern Caribbean. It has a long history of explosive and sometimes devastating eruptions. Beginning in December 2020 and ending in April 2021, La Soufrière Volcano produced a Volcano Explosivity Index (VEI) 4 eruption that greatly impacted the landscape, communities, and infrastructure on the island of St. Vincent. The eruption produced intense ash plumes, heavy ashfall, and pyroclastic flows down several river valleys. During and following the eruption, destructive lahars (volcanic mudflows) impacted rivers valleys and coastal communities for months. The USGS-USAID Volcano Disaster... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bare-earth, Break-lines, Digital Elevation Model, Eastern Caribbean, Eruption, All tags... Eruption impacts, Geomorphology, Geomorphology, Hazards Modeling, Hydrology, La Soufriere, Land Use Change, Lesser Antilles, Light Detection and Ranging (LIDAR), Remote Sensing, Saint Vincent Island, Saint Vincent and the Grenadines, Shaded-relief, St. Vincent and the Grenadines, Topography, USGS Science Data Catalog (SDC), Volcano, Volcano, Volcanology, digital elevation models, elevation, geoscientificInformation, image collections, imageryBaseMapsEarthCover, lidar, volcanology, Fewer tags Sulfur dioxide emission rates from Hawaiian volcanoes, 2018-2022 Measurement of sulfur dioxide (SO2) emission rates is a critical aspect of monitoring and studying active volcanoes. Changes in emission rate are often associated with changes in volcanic activity and in some cases may herald future changes in activity. At the Hawaiian Volcano Observatory (HVO), emission rates of SO2 from Hawaiian volcanoes have been measured by ultraviolet spectrometer since the late 1970s [Casadevall and others, 1987]. Here we present a compilation of SO2 emission rate measurements made from 2018 to 2022. The emission rates (in t/d) span five orders of magnitude through a range of activity styles unprecedented in recent times, including caldera collapse [Anderson and others, 2019], the first prolonged... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: DOAS, Geochemistry, Hawaii, Kīlauea, Mauna Loa, All tags... Remote Sensing, SO2 emission rate, Spectroscopy, Sulfur dioxide, USGS Science Data Catalog (SDC), Volcano, Volcanology, geoscientificInformation, volcanology, Fewer tags Structure-from-Motion source images for an inactive perched lava lake formed at Pu'u'o'o (Kilauea) in 2014 Lava flow hazards are usually thought to end when the erupting vent becomes inactive, but this is not always the case. At Kīlauea in August 2014, a spiny ʻaʻā flow erupted from the levee of a crusted perched lava lake that had been inactive for a month, and the surface of the lava lake subsided as the flow advanced downslope over the following few days. Topography constructed from oblique aerial photographs using structure-from-motion (SfM) software shows that the volume of the flow (~68,000 m3) closely matches the volume of subsidence of the crusted lava lake (~64,000 m3). The similarity of these volumes, along with the textural characteristics of the lava, shows that the lava that fed the flow had been stored... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: East Rift Zone, Island of Hawaiʻi, June 27th flow, Kīlauea, Puʻuʻōʻō, All tags... Pāhoa flow, SfM, State of Hawaii, Structure-from-Motion, aerial photograph, digital elevation model, elevation, lava flow, lava lake, volcano, Fewer tags