Results 171 to 180 of about 2,674 (211)

Toxic natural pollution at Ijen crater volcano: Environmental characteristics and health risk assessment. [PDF]

Toxicol Rep
Susetyo SH, Abidin AU, Sano K, Yoneda M, Matsui Y.   +4 more
europepmc   +1 more source

The hydrothermal system prior to a phreatic eruption: The case of the 1873 eruption at La Fossa (Vulcano Island, Italy)

Journal of Volcanology and Geothermal Research
Silvia Giansante, Paolo Fulignati, Anna Gioncada, Marco Pistolesi, Tomaso Esposti Ongaro, Antonio Tazzini, Raffaello Cioni   +6 more
openaire   +1 more source

Unveiling attenuation structures in the northern Taiwan volcanic zone. [PDF]

Sci Rep
Lin YP, Ko JY, Huang BS, Lin CH, Shih MH.   +4 more
europepmc   +1 more source

Quantitative experimental modeling of fragmentation during phreatomagmatic and phreatic eruptions

, 2012
openaire   +1 more source

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The mechanism of phreatic eruptions

Journal of Geophysical Research: Solid Earth, 1995
We investigate the mechanism for initiating phreatic eruptions following the emplacement of a shallow magmatic intrusion into water‐saturated permeable rock which contains subsidiary low‐permeability crack networks and disconnected cracks. Heat from the intrusion causes the local groundwater to boil and ascend through the main permeable crack network ...
Leonid N. Germanovich, Robert P. Lowell
openaire   +1 more source

Towards monitoring phreatic eruptions using seismic noise

2023
Phreatic and hydrothermal eruptions remain among the most difficult to forecast. The frequent absence of clear precursor signals challenges volcanologists' ability to provide timely and accurate hazard advice. They remain poorly understood and have recently caused human fatalities.
Corentin Caudron, Társilo Girona, Thomas Lecocq, Alberto Ardid, David Dempsey, Alexander Yates   +5 more
openaire   +1 more source

Phreatic eruptions of Ruapehu: April 1975

New Zealand Journal of Geology and Geophysics, 1979
Abstract A major phreatic eruption occurred in Ruapehu Crater Lake, North Island, New Zealand, at 1975 April 24d, 03h 59m, N.Z.S.T. Only nine minutes of volcanic-seismic activity preceded the eruption, but crater dilation had been measured by a geodetic survey two weeks earlier. Bad weather prevented observation of the eruption.
I. A. Nairn, C. P. Wood, C. A. Y. Hewson
openaire   +1 more source

A review on phreatic eruptions and their precursors

Journal of Volcanology and Geothermal Research, 1992
Abstract An analysis of the reported information on 132 historical phreatic events indicates that most of these (115) were not followed by a magmatic or phreatomagmatic eruption. Only in 18 cases precursory phenomena are reportedly lacking, whereas they are recognized for the majority (72) of the considered cases.
F. Barberi, A. Bertagnini, P. Landi, C. Principe   +3 more
openaire   +1 more source

Tamagawa hyper-acidic hot spring and phreatic eruptions at Mt. Akita-Yakeyama Volcano: Part 2. Secular variations of SO4/Cl ratios and their relationship to the phreatic eruptions

Journal of Volcanology and Geothermal Research, 2021
Abstract More than 70 years observation of the SO42−/Cl− molar ratios of water from the Obuki hot spring in the vicinity of Mt. Akita-Yakeyama volcano indicated that the ratio started increasing rapidly from 1973, peaked in 1980 (SO42−/Cl− = 0.34), remained at high values for about 18 years, then gradually decreased and returned to a normal baseline ...
Akira Ueda, Toshiaki Tanaka, Minoru Kusakabe, Takafumi Furukawa   +3 more
openaire   +1 more source

Direct dating of Quaternary phreatic maar eruptions by luminescence methods

Geology, 2011
The suitability of quartz optically stimulated luminescence (OSL) and feldspar infrared stimulated luminescence (IRSL) for the direct dating of phreatic eruptions was tested on examples from the Eifel Volcanic Field, Germany. The mean IRSL age of 11.6 ± 0.5 ka for Ulmener Maar Tephra is in excellent agreement with the independent age control (11 ± 0.1 ...
Preusser, Frank, Rufer, Daniel, Schreurs, Guido   +2 more
openaire   +2 more sources