Results 81 to 90 of about 132,968 (237)

Large‐Scale Topographic Changes at Erupting Volcanoes Measured by the TanDEM‐X Digital Change Map

open access: yesEarth and Space Science, Volume 12, Issue 11, November 2025.
Abstract Volcanic eruptions cause large‐scale topographic changes, through the emplacement of lava flows and lava domes, the formation of craters and calderas, and thick ash and pyroclastic deposits. Here we analyze the TanDEM‐X Digital Change Map (DCM), which compares the DEM produced during 2010–2015 with satellite acquisitions collected in 2016–2022.
Rebecca Edwards, Juliet Biggs
wiley   +1 more source

Renewed Explosive Phreatomagmatic Activity at Poás Volcano, Costa Rica in April 2017

open access: yesFrontiers in Earth Science, 2018
Phreatic and phreatomagmatic eruptions at volcanoes often present no short term precursory activity, making them a challenge to forecast. Poás volcano, Costa Rica, exhibits cyclic activity with phreatic and some phreatomagmatic eruptions separated by ...
Rebecca O. Salvage   +9 more
doaj   +1 more source

Decadal Monitoring of Seismic Velocity Changes Beneath Izu‐Oshima, Central Japan, Using Ambient Seismic Noise Records

open access: yesJournal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract This study monitors the seismic velocity changes beneath the Izu‐Oshima volcano, central Japan, using ambient seismic noise records from 2003 to 2020. Applying seismic interferometry to the continuous waveform data from 24 seismic stations, we observed significant temporal variations in the seismic velocity structure.
Yohei Yukutake   +3 more
wiley   +1 more source

Shallow volcanic earthquakes in the Owakudani geothermal area, Hakone volcano, Japan

open access: yesEarth, Planets and Space
Hakone volcano, located in central Japan, produced a small phreatic eruption in June 2015. Although seismic activity in the Hakone region is generally low, the area experiences episodic earthquake swarms approximately once every few years. In the volcano,
Ryo Kurihara   +3 more
doaj   +1 more source

Spontaneous Transient Summit Uplift at Taftan Volcano (Makran Subduction Arc) Imaged Using an InSAR Common‐Mode Filtering Method

open access: yesGeophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract We unambiguously document unrest at Taftan volcano. Summit uplift was detected using Interferometric Synthetic Aperture Radar time series and its timing tightly constrained applying a new common mode filtering method. Uplift started and ended gradually lasting 10 months (July 2023 to May 2024).
Mohammadhossein Mohammadnia   +3 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

open access: yesEarth, 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   +8 more
doaj   +1 more source

Laboratory studies of volcanic jets [PDF]

open access: yes, 1984
The study of the fluid dynamics of violent volcanic eruptions by laboratory experiment is described, and the important fluid-dynamic processes that can be examined in laboratory models are discussed in detail.
Kieffer, Susan Werner   +1 more
core   +2 more sources

Characterizing Spatiotemporal Ground Deformation at Whakaari (White Island) Volcano, New Zealand From 2014 to 2024 Using InSAR Time‐Series Analysis

open access: yesEarth and Space Science, Volume 12, Issue 9, September 2025.
Abstract Whakaari (White Island) volcano is the most active volcano in New Zealand with a dynamic hydrothermal system. The volcano has had four eruptive periods since 2014. In this study, our aim is to understand the pre‐and post‐eruption deformation processes occurring at Whakaari using interferometric synthetic aperture radar (InSAR).
Shreya Kanakiya   +2 more
wiley   +1 more source

Quantitative relationship between plume emission and multiple deflations after the 2014 phreatic eruption at Ontake volcano, Japan

open access: yesEarth, Planets and Space, 2019
The phreatic eruption of Mount Ontake in 2014 caused local-scale subsidence and a mass discharge of water–vapor plumes from vents. A previous study of InSAR data analysis modeled the local subsidence as a deflation of a shallow hydrothermal reservoir ...
Shohei Narita, M. Murakami, R. Tanaka
semanticscholar   +1 more source

Volcanic Facies From Probabilistic Multi‐Physics Characterization of an Andesite Island Volcano, Whakaari/White Island, New Zealand

open access: yesGeochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Collapse of hydrothermally weakened rock on the flanks of volcanic islands is a recognized cause of tsunamis generated by volcanoes. Here we use a multiphysics clustering method to derive a volcanic facies model for Whakaari/White Island, an andesite arc volcanic island in New Zealand.
C. A. Miller, F. Caratori Tontini
wiley   +1 more source

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