Results 61 to 70 of about 132,852 (226)

Seismic Precursors to the Whakaari 2019 Phreatic Eruption detected in Five Other Volcanoes [PDF]

open access: yes, 2021
Abstract Volcanic eruptions that occur without warning can be deadly in touristic and populated areas. Even with real-time geophysical monitoring, forecasting sudden eruptions is difficult because their precursors are hard to recognize and can vary between volcanoes. Here, we describe a general seismic precursor signal for gas-driven eruptions,
Alberto Ardid   +3 more
openaire   +1 more source

Magmatic Volatile Flux Drives Non‐Eruptive Volcano‐Tectonic Seismicity at Mount St. Helens, USA From 2008–2024

open access: yesJournal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract Seismicity during non‐eruptive periods is useful for observing stress changes related to magmatic transport and volatile exsolution within active volcanoes. Mount St. Helens in Washington, USA, is the most active volcano in the continental United States and has been in quiescence since 2008. To explore the processes driving seismicity at Mount
Brenton W. Hirao   +4 more
wiley   +1 more source

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

open access: yesEarth, 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   +3 more
doaj   +1 more source

Rock characteristics of post-caldera volcanoes in Dieng volcanic complex (DVC), Central Java, Indonesia

open access: yesJGEET: Journal of Geoscience, Engineering, Environment and Technology, 2022
The Dieng volcanic complex (DVC) has one of the densest post-caldera volcanisms activity presents in Indonesia, yet its population density is considerably high.
Indranova Suhendro   +2 more
doaj   +1 more source

MOESM1 of Anatomy of phreatic eruptions

open access: yes, 2019
Additional file 1. Spectrograms of harmonic tremor at White Island. Harmonic tremor recorded at White Island after a seismic quiescence of 20 min, and lasting for 8 h. a station WIZ b stations WSRZ. We used a window of 20 s without any overlap to create the spectrograms.
Caudron, Corentin   +8 more
openaire   +1 more source

Satellite Geodesy Reveals Shallow, Transient Magma Intrusions at Sotará Volcano, Colombia

open access: yesJournal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract Sotará is a little‐known andesitic‐dacitic stratovolcano in southwestern Colombia. Although there are no recorded historical eruptions, the volcano shows clear evidence of geothermal activity, deformation, and volcano‐tectonic seismicity. Its remote location and rugged terrain pose challenges for access and routine monitoring.
Rosa Alpala   +5 more
wiley   +1 more source

Corrigendum. Maars to calderas: end-members on a spectrum of explosive volcanic depressions [PDF]

open access: yes, 2017
A corrigendum on Maars to calderas: end-members on a spectrum of explosive volcanic depressions by Palladino, D. M., Valentine, G. A., Sottili, G., and Taddeucci, J. (2015). Front. Earth Sci. 3:36. doi: 10.3389/feart.2015.00036 Reason for Corrigendum:
Palladino, D. M.   +3 more
core   +1 more source

Stratigraphy and lithosedimentological properties of subplinian eruptions from Mt. Taranaki, New Zealand, encompassed by the Ngaere and Pungarehu edifice collapses

open access: yesNew Zealand Journal of Geology and Geophysics, Volume 68, Issue 4, Page 722-746, December 2025.
ABSTRACT The sudden removal of large portions of a volcanic edifice through collapse can cause depressurisation in the subvolcanic magmatic system, influencing the nature of subsequent eruptions. At Mt. Taranaki, edifice failure has occurred frequently and at different timescales throughout the volcanic history, forming a broad pattern of cyclic ...
Shannen Mills   +3 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

open access: yesGeophysical 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   +10 more
doaj   +1 more source

Aeromagnetic survey in Kusatsu-Shirane volcano, central Japan, by using an unmanned helicopter

open access: yesEarth, Planets and Space, 2021
Kusatsu-Shirane volcano is one of the active volcanoes in Japan. Phreatic explosions occurred in Mt. Shirane in 1983 and most recently, in 2018, in Mt. Motoshirane.
Takao Koyama   +9 more
doaj   +1 more source

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