Results 51 to 60 of about 26,142 (273)
Earth, Planets and SpaceDiscrete explosive eruptions, including vulcanian eruptions, occur at various stages during the effusion of viscous lava. However, the differences in occurrence time and mechanisms are not yet well understood or categorized.
Takayuki Kaneko +5 more
doaj +1 more source
Rheology of nanocrystal-bearing andesite magma and its roles in explosive volcanism
Communications Earth & Environment, 2022 Nanolite crystallisation increases bulk viscosity in mafic to intermediate magmas but other mechanisms are required to promote explosive eruptions, according to an experimental study using natural samples.
Satoshi Okumura +6 more
doaj +1 more source
Eruptions from Under-Ice Explosions [PDF]
, 1988 Abstract : Eruptions from under-ice explosions were recorded by a standard video camera and an ordinary motor-driven 35-mm camera. The records give the dimensions and velocities of the eruptions. Velocity, diameter, and height are related to charge depth and the results are compared with data for ordinary underwater explosions in ice-free water.
David L'Heureux, Malcolm Mellor
openaire +1 more source
Deep Underground Science and Engineering, EarlyView.This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu +8 more
wiley +1 more source
Magma Pressure-Temperature-Time Paths During Mafic Explosive Eruptions
Frontiers in Earth Science, 2020 We have constrained syneruptive pressure-temperature-time (P-T-t) paths of mafic magmas using a combination of short-timescale cooling and decompression chronometers. Recent work has shown that the thermal histories of crystals in the last few seconds to
Megan E. Newcombe +9 more
doaj +1 more source
Communications Earth & Environment, 2022 Large explosive eruptions of basaltic magma are promoted by low pre-eruptive temperatures in crystallising shallow magma reservoirs, according to an integrated petrological, geochemical and numerical modelling study.
Emily C. Bamber +8 more
doaj +1 more source
Capturing the Extreme in Volcanology: The Case for the Term “Supervolcano”
Frontiers in Earth Science, 2022 Although evocative, the term supervolcano has a checkered history of hyperbole and misuse to the point that it seems unprofessional. However, “supervolcano” is firmly embedded in volcanological discourse and we make the case that it is useful if defined ...
Shanaka de Silva, Stephen Self
doaj +1 more source
Sustainable Development, EarlyView.ABSTRACT The dynamic nature of small islands being geographically isolated and their perceived connectedness with global networks complicates research attempts to draw general conclusions on whether insularity leads to marginalization or strengthens their resilience for sustainable development.
Toheeb Lekan Jolaosho +2 more
wiley +1 more source
Quiet Sun Explosive Events: Jets, Splashes, and Eruptions
, 2012 Explosive events are small transition region phenomena characterised by broad non-Gaussian wings in their line profiles. Images from the Solar Dynamics Observatory (SDO) give a first view of the plasma dynamics at the sites of explosive events seen in O ...
Innes, Davina, Teriaca, Luca
core +1 more source
A 100-year record of North Pacific volcanism in an ice core from Eclipse icefield, Yukon Territory, Canada [PDF]
, 2003 A record of regionally significant volcanic eruptions in the North Pacific over the last century has been developed using a glaciochemical record from Eclipse Icefield, Yukon Territory, Canada.
Germani, Mark S +2 more
core +3 more sources