Results 31 to 40 of about 139,835 (226)

Under the surface: Textural analysis of complex, multi-component Vulcanian bombs produced during the hybrid effusive-explosive phase of the 2011-2012 Cordón Caulle eruption, Chile

, 2018
The ascent, eruption, and deposition of volcanic pyroclasts is complex, but the resultant rocks have distinctive textural markers that indicate the unseen processes that were operating during a given eruption.
Jack Whattam
semanticscholar   +6 more sources

On the occurrence of volcanic lightning during vulcanian eruptions at Sakurajima volcano, Japan

Volcanic eruptions are enigmatic, not in the least because of volcanic lightning during eruptions, which is still not fully understood. In an effort to better constrain conditions under which electrical discharges occur, we use data from a multicomponent geophysical network installed in 2019 at Sakurajima volcano, Japan.
André Geisler, Matthias Hort, Sonja A. Behnke, H. E. Edens, Taishi Yamada, Masato Iguchi, Haruhisa Nakamichi   +6 more
openalex   +2 more sources

Advective diffusion of volcanic plume captured by dense GNSS network around Sakurajima volcano: a case study of the vulcanian eruption on July 24, 2012 [PDF]

Earth, Planets and Space, 2015
Data from a dense GNSS network were used to investigate the temporal and spatial development of a volcanic plume during the eruptive event at Sakurajima volcano in Japan on July 24, 2012. We extracted the post-fit phase residuals (PPR) of ionosphere-free
Yusaku Ohta, Masato Iguchi
openalex   +2 more sources

Rise dynamics and relative ash distribution in vulcanian eruption plumes at Santiaguito Volcano, Guatemala, revealed using an ultraviolet imaging camera [PDF]

, 2008
Hiroko Yamamoto, I. M. Watson, Jeremy C. Phillips, G. J. Bluth   +3 more
openalex   +2 more sources

What controls the formation of vulcanian bombs? A case study from the 1 February 2014 eruption of Tungurahua (Ecuador)

Journal of Volcanology and Geothermal Research, 2023
Alessia Falasconi, Raffaello Cioni, Benjamin Bernard, Pablo Samaniego, Marco Pistolesi, Federica Schiavi   +5 more
openalex   +3 more sources

Pyrrhotite oxidation as a proxy for thermal structure of eruption clouds: A comparative study of Plinian and Vulcanian eruptions of Asama and Sakurajima volcanoes, Japan

, 2019
Thermal expansion of a volcanic eruption cloud by entrainment of air is a primary control of its behavior. Oxidation of the pyroclasts in the eruption cloud can be an indicator of the degree of air entrainment and thermal disequilibrium during its ...
Keiko Matsumoto
openalex   +2 more sources

Vulcanian eruptions with dominant single force components observed during the Asama 2004 volcanic activity in Japan [PDF]

, 2006
Takao Ohminato, Minoru Takeo, Hiroyuki Kumagai, Tadashi Yamashina, Jun Oikawa, Etsuro Koyama, Hiroshi Tsuji, Taku Urabe   +7 more
openalex   +3 more sources

Source process of Vulcanian explosion earthquakes at Sakurajima volcano, Japan, derived from seismic waveform inversion analysis in the very-long and long period bands and infrasound signals

Earth, Planets and Space
Eruption models developed using the waveform inversion method for explosion earthquakes differ across studies, and a unified model has not been established. Here, Vulcanian eruption processes of the Sakurajima volcano, Japan, were clarified using seismic
Ryohei Takahashi, Haruhisa Nakamichi
doaj   +2 more sources

Micro-Textural Controls on Magma Rheology and Vulcanian Explosion Cyclicity

Frontiers in Earth Science, 2021
Understanding the relationship between degassing, crystallization processes and eruption style is a central goal in volcanology, in particular how these processes modulate the magnitude and timing of cyclical Vulcanian explosions in intermediate magmas ...
Amelia A. Bain, Jackie E. Kendrick, Jackie E. Kendrick, Anthony Lamur, Yan Lavallée, Eliza S. Calder, Joaquín A. Cortés, Gloria Patricia Cortés, Diego Gómez Martinez, Roberto A. Torres   +9 more
doaj   +1 more source

Evaluating ascent condition during the formation of 723 CE vulcanian eruption of Kelud: Implication for hazard

OPHIOLITE : Jurnal Geologi Terapan
The 723 CE eruption of Kelud volcano in East Java, Indonesia, provides critical insights into the ascent dynamics and pre-eruptive conditions of explosive vulcanian eruption. This study examines textural and compositional variations in the groundmass and
Jananda Nuralam Indriyanto
openalex   +3 more sources