Drew T. Downs
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View article: Rhenium-osmium and oxygen isotope homogeneity during the 2022 Mauna Loa eruption and implications for basaltic magma storage
Rhenium-osmium and oxygen isotope homogeneity during the 2022 Mauna Loa eruption and implications for basaltic magma storage Open
Mauna Loa is one of the largest and most active volcanoes on Earth. The most recent eruption of Mauna Loa started on 27 November 2022, lasted for 13 days, and was preceded by the longest repose time of 38 years in its modern history. In th…
View article: RETRACTED: Petrogenesis and duration of a protracted mafic eruptive event in the northern Harrat Rahat volcanic field, Kingdom of Saudi Arabia
RETRACTED: Petrogenesis and duration of a protracted mafic eruptive event in the northern Harrat Rahat volcanic field, Kingdom of Saudi Arabia Open
The authors have requested that this preprint be removed from Research Square.
View article: Remote Single-Station Seismic Monitoring of the July–October 2022 Earthquake Swarm at Ta‘ū Volcano, American Samoa
Remote Single-Station Seismic Monitoring of the July–October 2022 Earthquake Swarm at Ta‘ū Volcano, American Samoa Open
From July to October 2022, a noneruptive volcanic earthquake swarm occurred within ∼15 km of Ta‘ū Island, located in eastern American Samoa. Felt reports from residents were the only available information about the swarm when it started, a…
View article: Awakening of Maunaloa Linked to Melt Shared from Kīlauea’s Mantle Source
Awakening of Maunaloa Linked to Melt Shared from Kīlauea’s Mantle Source Open
Maunaloa—the largest active volcano on Earth—erupted in 2022 after its longest known repose period (~38 years) and two decades of volcanic unrest. This eruptive hiatus at Maunaloa encompasses most of the ~35-year-long Puʻuʻōʻō eruption of …
View article: Depths in a Day—a New Era of Rapid-Response Raman-Based Barometry Using Fluid Inclusions
Depths in a Day—a New Era of Rapid-Response Raman-Based Barometry Using Fluid Inclusions Open
Rapid-response petrological monitoring is a major advance for volcano observatories, allowing them to build and validate models of plumbing systems that supply eruptions in near-real time. The depth of magma storage has recently been ident…
View article: The influence of vesicularity on grain morphology in basaltic pyroclasts from Mauna Loa and Kīlauea volcanoes
The influence of vesicularity on grain morphology in basaltic pyroclasts from Mauna Loa and Kīlauea volcanoes Open
Vesicularity of individual pyroclasts from airfall tephra deposits is an important parameter that is commonly measured at basaltic volcanoes. Conventional methods used to determine pyroclast vesicularity on a large number of clasts has the…
View article: Tracking magma pathways and surface faulting in the Southwest Rift Zone and the Koaʻe fault system (Kīlauea volcano) using photogrammetry and structural observations
Tracking magma pathways and surface faulting in the Southwest Rift Zone and the Koaʻe fault system (Kīlauea volcano) using photogrammetry and structural observations Open
Volcanic islands are often subject to flank instability, resulting from a combination of magma intrusions along rift zones, gravitational spreading and extensional faulting observed at the surface. Here we study the Kīlauea volcano in Hawa…
View article: Dynamics of the December 2020 Ash‐Poor Plume Formed by Lava‐Water Interaction at the Summit of Kīlauea Volcano, Hawaiʻi
Dynamics of the December 2020 Ash‐Poor Plume Formed by Lava‐Water Interaction at the Summit of Kīlauea Volcano, Hawaiʻi Open
On 20 December 2020, after more than 2 years of quiescence at Kīlauea Volcano, Hawaiʻi, renewed volcanic activity in the summit crater caused boiling of the water lake over a period of ∼90 min. The resulting water‐rich, electrified plume r…
View article: Lava flow emplacement in Harrat Rahat with implications for eruptions in mafic volcanic fields
Lava flow emplacement in Harrat Rahat with implications for eruptions in mafic volcanic fields Open
First posted December 29, 2023 For additional information, contact: Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025Contact Pubs Warehouse Mafic volcanic fields are widespread, but f…
View article: Overview of the Cenozoic geology of the northern Harrat Rahat volcanic field, Kingdom of Saudi Arabia
Overview of the Cenozoic geology of the northern Harrat Rahat volcanic field, Kingdom of Saudi Arabia Open
First posted December 29, 2023 For additional information, contact: Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025Contact Pubs Warehouse The Harrat Rahat volcanic field, located in…
View article: Eruptive history of northern Harrat Rahat—Volume, timing, and composition of volcanism over the past 1.2 million years
Eruptive history of northern Harrat Rahat—Volume, timing, and composition of volcanism over the past 1.2 million years Open
First posted December 29, 2023 For additional information, contact: Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025Contact Pubs Warehouse Harrat Rahat, one of several large, basalt-…
View article: Eruptive history within the vicinity of Al Madīnah in northern Harrat Rahat, Kingdom of Saudi Arabia
Eruptive history within the vicinity of Al Madīnah in northern Harrat Rahat, Kingdom of Saudi Arabia Open
First posted December 29, 2023 For additional information, contact: Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025Contact Pubs Warehouse The northernmost part of the Harrat Rahat v…
View article: The duration and characteristics of magmatic differentiation from basalt to trachyte within the Matan volcanic center, northern Harrat Rahat, Kingdom of Saudi Arabia
The duration and characteristics of magmatic differentiation from basalt to trachyte within the Matan volcanic center, northern Harrat Rahat, Kingdom of Saudi Arabia Open
First posted December 29, 2023 For additional information, contact: Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025Contact Pubs Warehouse A fundamental goal of igneous petrology is …
View article: Paleomagnetism of the Harrat Rahat volcanic field, Kingdom of Saudi Arabia—Geologic unit correlations and geomagnetic cryptochron identifications
Paleomagnetism of the Harrat Rahat volcanic field, Kingdom of Saudi Arabia—Geologic unit correlations and geomagnetic cryptochron identifications Open
First posted December 29, 2023 For additional information, contact: Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025 Paleomagnetic rock samples were collected from 173 drill sites in…
View article: Explosive trachyte eruptions from the Al Efairia volcanic center in northern Harrat Rahat, Kingdom of Saudi Arabia
Explosive trachyte eruptions from the Al Efairia volcanic center in northern Harrat Rahat, Kingdom of Saudi Arabia Open
First posted December 29, 2023 For additional information, contact: Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025 Harrat Rahat is an alkali basalt, continental, intraplate volcani…
View article: Mantle origin and crustal differentiation of basalts and hawaiites of northern Harrat Rahat, Kingdom of Saudi Arabia
Mantle origin and crustal differentiation of basalts and hawaiites of northern Harrat Rahat, Kingdom of Saudi Arabia Open
First posted December 29, 2023 For additional information, contact: Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025 Quaternary volcanic rocks of northern Harrat Rahat, Kingdom of Sa…
View article: Isotopic and geochemical evidence for the source of volcanism at Harrat Rahat, Kingdom of Saudi Arabia
Isotopic and geochemical evidence for the source of volcanism at Harrat Rahat, Kingdom of Saudi Arabia Open
First posted December 29, 2023 For additional information, contact: Volcano Science Center - Menlo ParkU.S. Geological Survey345 Middlefield Road, MS 910Menlo Park, CA 94025 Pleistocene and Holocene basalts, hawaiites, mugearites, benmorei…
View article: Geochemical and rheological characterization of the 1823 CE Keaīwa lava flow erupted from the Great Crack at Kīlauea Volcano
Geochemical and rheological characterization of the 1823 CE Keaīwa lava flow erupted from the Great Crack at Kīlauea Volcano Open
Recent volcanism at Kīlauea typically involves effusive, nonlife-threatening eruptions.However, the ~1500-1820 CE Keanakāko'i Tephra and older units show that Kīlauea experiences periods of dominantly explosive activity at the summit.Wheth…
View article: Supplemental Material: Simultaneous Middle Pleistocene eruption of three widespread tholeiitic basalts in northern California (USA): Insights into crustal magma transport in an actively extending back arc
Supplemental Material: Simultaneous Middle Pleistocene eruption of three widespread tholeiitic basalts in northern California (USA): Insights into crustal magma transport in an actively extending back arc Open
Table S1 (paleomagnetic analysis methods and data); Table S2 (detailed X-ray fluorescence spectrometry and instrumental neutron activation analysis methods and data); Table S3 and Figures S1–S4 (40Ar/39Ar experimental results, age spectra,…