Results 61 to 70 of about 1,257 (218)
Overview of Chaitén Volcano, Chile, and its 2008-2009 eruption
Andean Geology, 2013 Chaitén Volcano erupted unexpectedly in May 2008 in one of the largest eruptions globally since the 1990s. It was the largest rhyolite eruption since the great eruption of Katmai Volcano in 1912, and the first rhyolite eruption to have at least some of ...
Jon J. Major, Luis E. Lara
doaj +1 more source
Assessment of the usefulness of lithic clasts from pyroclastic deposits as paleomagnetic recorders [PDF]
, 2009 EThOS - Electronic Theses Online ServiceGBUnited ...
Paterson, Greig Alexander
core
The Magnitude of the 39.8 ka Campanian Ignimbrite Eruption, Italy: Method, Uncertainties and Errors
Frontiers in Earth Science, 2020 The calculation of the magnitude of an eruption needs the accurate estimate of its deposit volume. This is particularly critical for ignimbrites as no methods for their volume calculations and associated errors and uncertainties are consolidated in the ...
Aurora Silleni +4 more
doaj +1 more source
, 2017 Gravity-driven, ground-hugging gas-pyroclast mixtures produced during explosive volcanic eruptions define a full spectrum of particle concentration, flow regime and particle support mechanisms.
PALLADINO, Danilo Mauro +1 more
core +1 more source
Contribution of fine ash to the atmosphere from plumes associated with pyroclastic density currents [PDF]
, 2016 A co-pyroclastic density current (co-PDC) plume forms as a mixture of fine-grained (
S. Engwell +5 more
core +1 more source
New insights into the Upper Pleistocene directed blast eruption, Popocatépetl volcano, México
VolcanicaVolcanic eruptions of the directed blast type are characterized by powerful explosions with a significant lateral pyroclastic density current (PDC) component that can travel at speeds above 100 m s–1 and affect hundreds of square kilometers around a ...
R. Marcela Lira-Beltrán +4 more
doaj +1 more source
Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents [PDF]
Bulletin of Volcanology, 2018 The high mobility of dense pyroclastic density currents (PDCs) is commonly attributed to high gas pore pressures. However, the influence of spatial and temporal variations in pore pressure within PDCs has yet to be investigated. Theory suggests that variability in the fluidisation and aeration of a current will have a significant control on PDC flow ...
Rowley, Pete +3 more
openaire +4 more sources
Volcanic Ash Resuspension in Patagonia: Numerical Simulations and Observations
Atmosphere, 2020 Resuspension of pyroclastic deposits occurs under specific atmospheric and environmental conditions and typically prolongs and exacerbates the impact associated with the primary emplacement of tephra fallout and pyroclastic density current deposits.
Leonardo Mingari +3 more
doaj +1 more source
Scientific Reports, 2022 We report on the ash cloud related to the gravitational collapse of a portion of the Stromboli volcano crater rim that occurred on 19 May 2021. The collapse produced a pyroclastic density current (PDC) that spread along the northwest flank of the volcano
Giuseppe Re +3 more
doaj +1 more source
Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)
Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki +5 more
wiley +1 more source