Results 41 to 50 of about 331 (178)

Paleomagnetism and paleomagnetic dating to large volcanic bombs: an example from the historical eruption of Azuma–Jododaira volcano, NE Japan

Earth, Planets and Space, 2023
Vulcanian activity is one of the most common eruption styles of arc andesitic volcanism on Earth. It ejects and deposits volcanic bombs around the source crater.
Takeshi Hasegawa, Bunta Kikuchi, Shohei Shibata, Yuhji Yamamoto, Takumi Imura, Masao Ban, Kae Tsunematsu, Chie Kusu, Makoto Okada, Tsukasa Ohba   +9 more
doaj   +1 more source

Volcanic SO₂ and SiF₄ visualization using 2-D thermal emission spectroscopy – Part 1: Slant-columns and their ratios [PDF]

Atmospheric Measurement Techniques, 2012
The composition and emission rates of volcanic gas plumes provide insight of the geologic internal activity, atmospheric chemistry, aerosol formation and radiative processes around it.
M. Grutter, R. Harig, A. Krueger, W. Stremme   +3 more
doaj   +1 more source

Modeling Tephra Fall and Sediment-Water Flows to Assess Their Impacts on a Vulnerable Building Stock in the City of Arequipa, Peru

Frontiers in Earth Science, 2022
Arequipa, Peru’s second economic center hosting c. 1,110,000 inhabitants, is the largest South American city exposed to a large variety of natural hazards.
J.-C. Thouret, E. Arapa, S. Charbonnier, A. Guerrero, K. Kelfoun, G. Cordoba, D. Rodriguez, O. Santoni   +7 more
doaj   +1 more source

Volcanic Eruption Forecasts From Accelerating Rates of Drumbeat Long‐Period Earthquakes

Geophysical Research Letters, 2018
Accelerating rates of quasiperiodic “drumbeat” long‐period earthquakes (LPs) are commonly reported before eruptions at andesite and dacite volcanoes, and promise insights into the nature of fundamental preeruptive processes and improved eruption ...
Andrew F. Bell, Mark Naylor, Stephen Hernandez, Ian G. Main, H. Elizabeth Gaunt, Patricia Mothes, Mario Ruiz   +6 more
doaj   +1 more source

Mapping the susceptibility of rain-triggered lahars at Vulcano island (Italy) combining field characterization, geotechnical analysis, and numerical modelling [PDF]

Natural Hazards and Earth System Sciences, 2019
The characterization of triggering dynamics and remobilized volumes is crucial to the assessment of associated lahar hazards. We propose an innovative treatment of the cascading effect between tephra fallout and lahar hazards based on probabilistic ...
V. Baumann, C. Bonadonna, S. Cuomo, M. Moscariello, S. Biass, M. Pistolesi, A. Gattuso   +6 more
doaj   +1 more source

The ash-fall hazard from a Plinian eruption at Colima Volcano, Mexico

Annals of Geophysics, 2010
The historical eruptive activity at Colima Volcano has been characterized by Strombolian and Merapi type eruptions and Vulcanian explosions associated with dome growth, which have ended in a Plinian eruption about every 100 years.
Rita Fonseca
doaj   +1 more source

Self‐Potential Signal Associated With Hydrothermal System Disrupted by Extreme Raining Events; The Case Study of Formica Leo, Piton de la Fournaise, La Réunion Island

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract The scoria cones called Formica Leo located at the base of the Piton de la Fournaise terminal cone have been chosen for its significant positive Self‐Potential (SP) anomalies associated with hydrothermal uprising fluids to monitor SP signal and study its dynamics in relation with huge and extreme rainfall events.
Emilie Roulleau, Anthony Finizola, Nicolas Vinet, Romain Biennais, Mazhar Meralli Ballou, Amélie Poullot, Céline D'Angelo, Clément Grace, Emma Chaudron Vrignaud, Rachel Gusset, Killian Mussard, Jehoji Kuzamba Ethu, Elisa‐Lou Reati   +12 more
wiley   +1 more source

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

Earth 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

Using Lake Sediment Cores to Improve Records of Volcanism at Aluto Volcano in the Main Ethiopian Rift

Geochemistry, Geophysics, Geosystems, 2018
Aluto is a silicic volcano in central Ethiopia, flanked by two large population centers and home to an expanding geothermal power plant. Here we present data from two lake sediment cores sampled 12 and 25 km from the volcano, which record at least 24 ...
K. McNamara, K. V. Cashman, A. C. Rust, K. Fontijn, F. Chalié, E. L. Tomlinson, G. Yirgu   +6 more
doaj   +1 more source

Numerically Efficient Model for the Nucleation, Growth, and Coalescence of Bubbles in Magma

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract We present a numerical model to describe the nucleation, growth, and coalescence of bubbles in a decompressed magma. The new model enables us to calculate the bubble size distribution (BSD) at a low computational cost by taking the bubble mass as a variable.
Masatoshi Ohashi
wiley   +1 more source