Results 31 to 40 of about 308 (170)

Fault‐Controlled Plumbing System Beneath Lipari Volcanic Island Revealed by Seismic Matrix Imaging

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Lipari Island hosts an active magmatic–hydrothermal system, but its deep plumbing architecture remains poorly resolved due to strong seismic scattering. We apply passive seismic matrix imaging to public vertical‐component cross‐correlation functions from the dense 2018 Lipari nodal array, recovering relative‐reflectivity structures to ∼10 km ...
Jia Wei, Qiancheng Liu, Ling Chen
wiley   +1 more source

Migration of seismic activity associated with phreatic eruption at Merapi volcano, Indonesia [PDF]

Journal of Volcanology and Geothermal Research, 2020
Abstract Phreatic activity of Merapi started after nearly 2 years of quiescence following the October–November 2010 eruption which was the largest in more than 100 years. A dozen eruptions identified by visual and/or seismic observations took place between August 2012 and April 2014.
Métaxian, Jean-Philippe, Santoso, Agus Budi, Caudron, Corentin, Cholik, Noer, Labonne, Claire, Poiata, Natalia, Beauducel, François, Monteiller, Vadim, Fahmi, Ahmad Ali, Rizal, Muchammad Husni, Nandaka, I. G. Made Agung   +10 more
openaire   +3 more sources

Block and Bomb Field of the 1888–1890 CE Eruption at La Fossa Cone (Vulcano, Aeolian Islands): Constraints on Conduit Stratigraphy and Eruptive Dynamics

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract Vulcanian eruptions are classically associated with the launch of ballistic ejecta and particularly with the production of breadcrust bombs. Morpho‐textural analysis of these ejecta provides critical insight into the poorly constrained processes controlling the complex dynamics of Vulcanian activity.
P. Gabellini, R. Cioni, M. Pistolesi, P. Donato, R. De Rosa   +4 more
wiley   +1 more source

Seismic Tremor as a Precursor to Hydrothermal Explosions Near Mutnovsky Volcano (Kamchatka)

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Mutnovsky Volcano, ∼70 km SW of Petropavlovsk‐Kamchatsky, exhibits persistent degassing, hosts active hydrothermal springs and the Mutnovsky Geothermal Power Plant (MGPP) on its slopes. Using the network covariance matrix approach, we analyzed seismic data recorded in 2023–2024 by 15 seismic stations operating around Mutnovsky Volcano.
Y. Berezhnev, N. Belovezhets, N. M. Shapiro, S. Abramenkov, I. Abkadyrov, S. Yaskevich, D. Chebrov, I. Koulakov   +7 more
wiley   +1 more source

Emplacement Conditions and Alteration of Volcanic Deposits Inferred From Magnetic Properties of the ICDP Eger Drill Site S4 (Bažina Maar), Czechia

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract Titanomagnetite in alkaline maar deposits exhibits variable syn‐ and post‐crystallization alteration linked to wet emplacement and groundwater fluctuations, which remain poorly documented. Magnetic and mineralogical analyses of lapilli, scoria, and basalt from ICDP Eger drill cores S4 and S4b (Bažina maar, western Eger Graben, Czechia) reveal ...
Johanna Berckhan, Agnes Kontny, Katarzyna Dudzisz, Jan Mrlina, Norbert Nowaczyk, Simo Spassov, Franziska D. H. Wilke   +6 more
wiley   +1 more source

Insights on Hydrothermal‐Magmatic Interactions and Eruptive Processes at Poás Volcano (Costa Rica) From High‐Frequency Gas Monitoring and Drone Measurements

Geophysical Research Letters, 2019
Identification of unambiguous signals of volcanic unrest is crucial in hazard assessment. Processes leading to phreatic and phreatomagmatic eruptions remain poorly understood, inhibiting effective eruption forecasting.
J. M. deMoor, J. Stix, G. Avard, C. Muller, E. Corrales, J. A. Diaz, A. Alan, J. Brenes, J. Pacheco, A. Aiuppa, T. P. Fischer   +10 more
doaj   +1 more source

Contention between supply of hydrothermal fluid and conduit obstruction: inferences from numerical simulations

Earth, Planets and Space, 2018
We investigate a volcanic hydrothermal system using numerical simulations, focusing on change in crater temperature. Both increases and decreases in crater temperature have been observed before phreatic eruptions.
Ryo Tanaka, Takeshi Hashimoto, Nobuo Matsushima, Tsuneo Ishido   +3 more
doaj   +1 more source

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

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.
Takayuki Kaneko, Fukashi Maeno, Setsuya Nakada   +2 more
openaire   +1 more source

Insights Into Magmatic Degassing, Hydrothermal Dynamics, and Eruption Precursors From Long Term SO2 Emission Monitoring at Whakaari/White Island, New Zealand

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Long‐term SO2 emission rate time series are critical for deciphering the subsurface processes regulating open‐vent volcanoes, yet extracting cyclical drivers from continuous degassing records remains challenging. We analyze a 14‐year (2006–2020) SO2 emission rate data set from Whakaari/White Island, New Zealand, identifying five chronological ...
A. Mazot, C. Miller, K. Britten, B. Scott, G. Kilgour, Cynthia Werner   +5 more
wiley   +1 more source

Transition from magmatic to phreatomagmatic eruptions in Young Ciremai volcano, Indonesia: insights from stratigraphy, componentry, and textural analysis of tephra deposits

Earth, Planets and Space
Vulcanian eruptions, characterized by intermediate magma compositions, pose significant hazards due to their potential for both magmatic and phreatomagmatic fragmentation.
Wildan N. Hamzah, Tsukasa Ohba, Muhammad Andriansyah Gurusinga, Mradipta L. A. Moktikanana, Jananda N. Indriyanto, Takashi Hoshide, Mirzam Abdurrahman, Idham A. Kurniawan, Fadlin   +8 more
doaj   +1 more source