Results 71 to 80 of about 320 (168)

Interactive 3D simulation of Taal Volcano eruption plumes

Applied Computing and Geosciences
The Taal Volcano in the Philippines is one of the most active volcanoes due to its recurrent, sometimes highly destructive eruptions, especially the 12 January 2020 phreatomagmatic eruption classified as VEI=4.
Neil Patrick Del Gallego, Onesimus Dela Torre, Carlos Miguel Arquillo, Vaughn Vincent Cordero, Joaquin Lorenzo Sales, Stephen Lance Yarte   +5 more
doaj   +1 more source

Experimental constraints on phreatic eruption processes at Whakaari (White Island volcano)

Journal of Volcanology and Geothermal Research, 2015
AbstractVigorous hydrothermal activity interspersed by sequences of phreatic and phreatomagmatic eruptions occur at Whakaari (White Island volcano), New Zealand. Here, we investigate the influence of sample type (hydrothermally altered cemented ash tuffs and unconsolidated ash/lapilli) and fragmentation mechanism (steam flashing versus gas expansion ...
Mayer, Klaus, Scheu, Bettina, Gilg, Albert, Heap, Michael, Kennedy, Ben, Lavallée, Yan, Letham-Brake, Mark, Dingwell, Donald B.   +7 more
openaire   +5 more sources

Phreatic eruptions and deformation of Ioto Island (Iwo-jima), Japan, triggered by deep magma injection

Earth, Planets and Space, 2018
On Ioto Island (Iwo-jima), 44 phreatic eruptions have been recorded since 1889, when people began to settle there. Four of these eruptions, after the beginning of continuous observation by seismometers in 1976, were accompanied by intense seismic ...
Hideki Ueda, Masashi Nagai, Toshikazu Tanada   +2 more
doaj   +1 more source

Source constraints for the 2015 phreatic eruption of Hakone volcano, Japan, based on geological analysis and resistivity structure

Earth, Planets and Space, 2019
On June 29, 2015, a small phreatic eruption occurred in the most intensively steaming area of Hakone volcano, Japan. A previous magnetotelluric survey for the whole volcano revealed that the eruption center area (ECA) was located near the apex of a bell ...
Kazutaka Mannen, Toshikazu Tanada, Akira Jomori, Takashi Akatsuka, George Kikugawa, Yui Fukazawa, Hiroyuki Yamashita, Koichiro Fujimoto   +7 more
doaj   +1 more source

Sensitivity to lunar cycles prior to the 2007 eruption of Ruapehu volcano

Scientific Reports, 2018
A long-standing question in Earth Science is the extent to which seismic and volcanic activity can be regulated by tidal stresses, a repeatable and predictable external excitation induced by the Moon-Sun gravitational force.
Társilo Girona, Christian Huber, Corentin Caudron   +2 more
doaj   +1 more source

Origins and significance of alteration textures in hydrovolcanic products from active volcanoes

Earth, Planets and Space
While mineralization processes in hydrothermal systems have been studied intensively from the viewpoint of economic geology, the composition, and textures of hydrothermally altered materials in hydrovolcanic ash have not been fully analyzed in active ...
Yusuke Minami, Nobuo Geshi
doaj   +1 more source

Time Varying Crustal Anisotropy at Whakaari/White Island Volcano

Geophysical Research Letters
Whakaari/White Island has been the most active New Zealand volcano in the 21st century, producing small phreatic and phreatomagmatic eruptions, which are hard to predict.
D. Y. Mengesha, M. K. Savage, A. D. Jolly, C. J. Ebinger   +3 more
doaj   +1 more source

Modeling the priming mechanism of phreatic eruptions

Phreatic eruptions are non-magmatic explosions consisting in the sudden expansions of groundwater due to the input of hot magmatic ¿¿uids and heat. Although such eruptions are intrinsically less hazardous than magmatic eruptions (i.e. the energy released in the process is relatively low) the lack of clear and early precursory signals increases the ...
Stocchi, M., Houzeaux, Guillaume, Costa, Antonio, Folch, Arnau, Massaro, Silvia, Sulpizio, Roberto   +5 more
openaire   +1 more source

A numerical model for precursory time sequences of the phreatic eruptions of Mt. Ontake, central Japan

Earth, Planets and Space
The 2014 phreatic eruption of Mt. Ontake was preceded by increased volcano-tectonic (VT) seismicity, but all other types of precursors were obscure. A subsurface process leading to eruption with few precursors has yet to be identified.
Yuta Maeda
doaj   +1 more source

Geological study of phreatic eruptions

The Journal of the Geological Society of Japan, 2018
Teruki Oikawa, Tsukasa Oba, Akihiko Fujinawa, Hisashi Sasaki   +3 more
openaire   +2 more sources