Results 21 to 30 of about 132,852 (226)

The August 2010 Phreatic Eruption of Mount Sinabung, North Sumatra [PDF]

Indonesian Journal on Geoscience, 2013
DOI: 10.17014/ijog.v8i1.155Mount Sinabung, located in Karo Regency, North Sumatra Province, is a strato volcano having four active craters. Since its latest eruption about 1,200 year ago, a phreatic eruption occurred on August 27th, 2010.
Prambada, O. (O), Siregar, D. A. (D), Sutawidjaja, I. S. (Igan)   +2 more
core   +4 more sources

Upper holocene tephro-chronostratigraphy of Irazú Volcano, Costa Rica [PDF]

Scientific Reports
Irazú is one of the largest and most active volcanoes in Costa Rica. We present the tephro-chronostratigraphy of the last 2.6 ka of the Irazú volcano based on detailed field work and C14 radiometric dating, as well as a revision of the geological and ...
Daniela Campos-Durán, Guillermo E. Alvarado, Joan Martí   +2 more
doaj   +2 more sources

2014 Mount Ontake eruption: characteristics of the phreatic eruption as inferred from aerial observations [PDF]

Earth, Planets and Space, 2016
The sudden eruption of Mount Ontake on September 27, 2014, led to a tragedy that caused more than 60 fatalities including missing persons. In order to mitigate the potential risks posed by similar volcano-related disasters, it is vital to have a clear understanding of the activity status and progression of eruptions.
Fukashi Maeno, Setsuya Nakada, Takayuki Kaneko   +2 more
core   +2 more sources

Hazards of volcanic lakes: analysis of Lakes Quilotoa and Cuicocha, Ecuador [PDF]

Advances in Geosciences, 2008
Volcanic lakes within calderas should be viewed as high-risk systems, and an intensive lake monitoring must be carried out to evaluate the hazard of potential limnic or phreatic-magmatic eruptions. In Ecuador, two caldera lakes – Lakes Quilotoa
G. Gunkel, C. Beulker, B. Grupe, F. Viteri   +3 more
doaj   +3 more sources

TIME PULSES OF CENOZOIC EXPLOSIVE PHREATIC ERUPTIONS IN SOUTHWESTERN PRIMORYE. CORRELATION OF ISOTOPIC AND PHYTOSTRATIGRAPHIC AGE DATING RESULTS

Tikhookeanskaya Geologiya, 2022
The Cenozoic tephra deposits - products of explosive phreatic eruptions of maar volcanoes in the southwest of Primorye are studied. The deposits represent rhyolitic ash and pumice pyroclastic beds with a high terrigenous component, including tephroid ...
S. O. Maksimov
semanticscholar   +1 more source

Overview of the Special Issue “Mechanism of Phreatic Eruptions and Challenges for Eruption Forecasting: Latest Advances and Volcanic Disaster Prevention”

Journal of Geography (Chigaku Zasshi), 2021
Owakudani, the eruption center of the 2015 eruption of Hakone Volcano, is one of the most popular tourist destinations in Japan, attracting more than three million visitors every year. However, the new crater created by the eruption is only 200 m from an
K. Mannen, Y. Yukutake, R. Doke, D. Hirata   +3 more
semanticscholar   +1 more source

Rare Earth Elements Variations in a Hyperacid Crater Lake and Their Relations With Changes in Phreatic Activity, Physico-Chemical Parameters, and Chemical Composition: The Case of Poás Volcano (Costa Rica)

Frontiers in Earth Science, 2022
Decades of geochemical monitoring at active crater lakes worldwide have confirmed that variations in major elements and physico-chemical parameters are useful to detect changes in volcanic activity.
Sabrina Pappaterra, Claudio Inguaggiato, Claudio Inguaggiato, Dmitri Rouwet, Raúl Mora-Amador, Carlos Ramírez-Umaña, Gino González, Gino González, Gino González, Lorenzo Brusca, Loic Peiffer, Gilles Levresse, Sergio Bellomo   +12 more
doaj   +1 more source

Preface for the Special Issue “Mechanism of Phreatic Eruptions and Challenges for Eruption Forecasting: Latest Advances and Volcanic Disaster Prevention”

Journal of Geography (Chigaku Zasshi), 2021
箱根火山 2015年噴火の噴出中心となった大涌 谷は,年間 300万人の観光客が訪れるとされる 国内有数の観光地であるが,この噴火で新たに生 じた火口は,観光客が散策する領域からわずか 200 mほどしか離れていない(例えば, Mannen et al., 2018)。また,大涌谷の近傍には,2015年 噴火よりもはるかに大規模な水蒸気噴火の給源と なったと考えられる火口地形が複数認められる (例えば, 山口ほか, 2021)。こうしたことから, 噴火前に立入規制などの防災行動をとることは人 ...
K. Mannen, Y. Yukutake, R. Doke, D. Hirata   +3 more
semanticscholar   +1 more source

Phreatic volcanic eruption preceded by observable shallow groundwater flow at Iwo-Yama, Kirishima Volcanic Complex, Japan

Communications Earth & Environment, 2022
Electric field changes generated by the movement of shallow groundwater can be regarded as a precursor to phreatic volcanic eruptions, according to near-vent geophysical observations of Iwo-Yama volcano in the Kirishima complex, Japan.
Koki Aizawa, Dan Muramatsu, Takeshi Matsushima, Takao Koyama, Makoto Uyeshima, Shigeru Nakao   +5 more
doaj   +1 more source

Fluid-mineral dynamics at the Rincón de la Vieja volcano—hydrothermal system (Costa Rica) inferred by the study of major, minor and rare earth elements in the hyperacid crater lake

Frontiers in Earth Science, 2023
Volcanic lakes are complex natural systems and their chemical composition is related to a myriad of processes. The chemical composition of major, minor, Rare Earth Elements (REE) and physico-chemical parameters at the hyperacid crater lake of Rincón de ...
Sabrina Pappaterra, Claudio Inguaggiato, Claudio Inguaggiato, Dmitri Rouwet, Gilles Levresse, Loic Peiffer, Loic Peiffer, Carmine Apollaro, Raúl Mora-Amador, Carlos Ramírez-Umaña, Gino González, Gino González, Gino González, Benedetto Schiavo, Thomas Gunter Kretzschmar, Lorenzo Brusca   +15 more
doaj   +1 more source