Results 21 to 30 of about 5,519 (262)
Radiographic visualization of magma dynamics in an erupting volcano [PDF]
Nature Communications, 2014 AbstractRadiographic imaging of magma dynamics in a volcanic conduit provides detailed information about ascent and descent of magma, the magma flow rate, the conduit diameter and inflation and deflation of magma due to volatile expansion and release. Here we report the first radiographic observation of the ascent and descent of magma along a conduit ...
Tanaka, Hiroyuki K. M. +2 more
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The Dynamics of Eruptive Prominences [PDF]
, 2014 28 pages, 15 figures, Chapter 15 of the book Solar Prominences, edited by J.-C. Vial & O. Engvold, Springer, in press (2014)
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Formation and dynamics of a solar eruptive flux tube [PDF]
Nature Communications, 2018 AbstractSolar eruptions are well-known drivers of extreme space weather, which can greatly disturb the Earth’s magnetosphere and ionosphere. The triggering process and initial dynamics of these eruptions are still an area of intense study. Here we perform a magnetohydrodynamic simulation taking into account the observed photospheric magnetic field to ...
Inoue, S. +3 more
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Mathematical modeling of the spread of the coronavirus under strict social restrictions
Mathematical Methods in the Applied Sciences, EarlyView., 2021 We formulate a simple susceptible‐infectious‐recovery (SIR) model to describe the spread of the coronavirus under strict social restrictions. The transmission rate in this model is exponentially decreasing with time. We find a formula for basic reproduction function and estimate the maximum number of daily infected individuals.
Mo'tassem Al‐arydah +3 more
wiley +1 more source
Explosive Behavior of Intermediate Magmas: The Example of Cotopaxi Volcano (Ecuador)
Geochemistry, Geophysics, Geosystems, 2021 The variability in intensity and style shown by explosive volcanism has been traditionally explained by a complex interplay among melt composition and pre‐eruptive volatile content, which modulate magma ascent and conduit dynamics. However, magmas having
M. Pistolesi +5 more
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Understanding the plume dynamics of explosive super-eruptions [PDF]
Nature Communications, 2018 AbstractExplosive super-eruptions can erupt up to thousands of km3 of magma with extremely high mass flow rates (MFR). The plume dynamics of these super-eruptions are still poorly understood. To understand the processes operating in these plumes we used a fluid-dynamical model to simulate what happens at a range of MFR, from values generating intense ...
Antonio Costa +2 more
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VolcanicaParoxysmal mafic activity is a relevant source of hazard at many active volcanoes. At volcanoes like Etna (Italy), paroxysmal eruptions have highly variable transient dynamics, thus monitoring activities are crucial for the understanding and ...
Francesco Amadio +5 more
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Geophysical Research Letters, 2023 Volcanic seismicity provides essential insights into the behavior of an active volcano across multiple time scales. However, to understand how magma moves as the eruption cycle develops, better knowledge of the geometry and physical properties of the ...
Xiaotao Yang +3 more
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Characterizing the dynamics of geyser eruptions [PDF]
Eos, Transactions American Geophysical Union, 2013 Some geysers have predictable eruptions that make them ideal for study. Understanding geyser eruption dynamics can provide insight into other intermittent natural processes, such as volcanic eruptions, but most studies of geysers have focused on the processes that trigger geyser eruption. The eruption jet dynamics are less well characterized.
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Dynamics of solar coronal eruptions [PDF]
Journal of Geophysical Research: Space Physics, 2001 The kinematics of 87 solar eruptive events (flare sprays, eruptive prominences, and coronal transients) observed above the solar limb are studied. The data reveal a clear statistical trend for the highest measured value of the acceleration to be lower in the events taking place at a larger radial distance.
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