Results 21 to 30 of about 2,078 (215)

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
Vulcanian eruptions are very common at many volcanoes around the world that erupt intermediate to silicic magmas. This type of eruption generates a wide variability of bombs and blocks preserving information onto the conduit processes that strongly control the dynamics of these events.
Alessia Falasconi, Raffaello Cioni, Benjamin Bernard, Pablo Samaniego, Marco Pistolesi, Federica Schiavi   +5 more
openalex   +4 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

Composition of volcanic gases emitted during repeating Vulcanian eruption stage of Shinmoedake, Kirishima volcano, Japan [PDF]

Earth, Planets and Space, 2013
Volcanic gas compositions of Shinmoedake, Kirishima volcano, Japan were measured by Multi-GAS during the persistent degassing period with repeating Vulcanian eruptions from March 2011 to March 2012. In order to avoid risks due to eruptions, the measurements were performed with the Unmanned Aerial Vehicles (UAV) that fly through the plume with the Multi-
Hiroshi Shinohara
openalex   +3 more sources

The Effect of Wind and Atmospheric Stability on the Morphology of Volcanic Plumes From Vulcanian Eruptions [PDF]

Journal of Geophysical Research: Solid Earth, 2019
AbstractVolcanic plumes from small and moderate eruptions represent a challenge in the study of plume morphology due to eruption source parameter uncertainties and atmospheric influence. Sakurajima volcano, Japan, features such activity and due to its continuous eruptions in the recent years provides an ideal natural laboratory.
Alexandros Panagiotis Poulidis, Tetsuya Takemi, Masato Iguchi   +2 more
openalex   +3 more sources

Dispersal and grain size characteristics of the May 14, 2018 Shinmoedake eruption deposit, Kirishima Volcano, Japan, based on post-eruption field survey and meteorological datasets

Earth, Planets and Space, 2023
This study describes the dispersal and grain size characteristics of the May 14, 2018 Shinmoedake eruption deposits of Kirishima Volcano in southern Kyushu, southwestern Japan.
Yasuo Miyabuchi, Eiichi Sato
doaj   +1 more source

Vulcanian eruption mechanisms [PDF]

Nature, 1979
Application of a newly developed theory to volcanological observations of explosive eruptions shows that previous estimates of pre-explosion gas pressures may be overestimated by an order of magnitude.
Self, Stephen, Wilson, Lionel, Nairn, Ian A.   +2 more
openaire   +1 more source

Long-term change of the eruption activities of Sakurajima volcano, Japan, inferred from the fallout tephra deposits

Frontiers in Earth Science, 2022
Stratigraphic analysis of fallout tephra deposits in and around a volcano provides a framework for understanding the long-term temporal change in the volcano’s activities.
Ayumu Nishihara, Ayumu Nishihara, Nobuo Geshi, Hideto Naruo   +3 more
doaj   +1 more source

Sequence of Volcanic Activity of Sakurajima Volcano, Japan, as Revealed by Non-Eruptive Deflation

Frontiers in Earth Science, 2022
Mechanisms that control fluctuation of long-term eruptive activity are not well understood. Since 1955, Sakurajima volcano has experienced repeated Vulcanian eruptions accompanied by deflation.
Masato Iguchi, Taishi Yamada, Takeshi Tameguri   +2 more
doaj   +1 more source

Diverse Eruptive Activity Revealed by Acoustic and Electromagnetic Observations of the 14 July 2013 Intense Vulcanian Eruption of Tungurahua Volcano, Ecuador [PDF]

Geophysical Research Letters, 2018
AbstractDuring the powerful July 2013 eruption of Tungurahua volcano, Ecuador, we recorded exceptionally high amplitude, long‐period infrasound (1,600‐Pa peak‐to‐peak amplitude, 5.5‐s period) on sensors within 2 km of the vent alongside electromagnetic signals from volcanic lightning serendipitously captured as interference.
Jacob F. Anderson, J. B. Johnson, Alexander Steele, Mario Ruiz, Brittany D. Brand   +4 more
openalex   +5 more sources

Source mechanism of Vulcanian eruption at Tungurahua Volcano, Ecuador, derived fromseismic moment tensor inversions [PDF]

Journal of Geophysical Research: Solid Earth, 2014
Source mechanisms of explosive volcanic eruptions are critical for understanding magmatic plumbing systems and magma transport. Tungurahua is a large andesitic stratovolcano where seismoacoustic data has been recorded over several years. In May 2010, an energetic eruption cycle began with a midsize Vulcanian explosion followed by swarms of explosive ...
K. Kim, J.M. Lees, M.C. Ruiz
  +6 more sources