Results 51 to 60 of about 21,586 (203)

Paleomagnetic study of the 30 ka Aira caldera-forming eruption and 60–45 ka Iwato pyroclastic flow deposits, southern Kyushu, Japan

Earth, Planets and Space
To constrain the age and duration of large-scale caldera-forming eruptions, we measured paleomagnetic directions of pyroclastic deposits from the 30 ka Aira caldera eruption sequence, and the 60–45 ka Iwato pyroclastic flow deposits around Aira caldera ...
Takeshi Hasegawa, Nobutatsu Mochizuki, Hidetoshi Shibuya, Ayumu Nishihara, Chie Kusu, Shohei Shibata, Makoto Okada, Kuniaki Nishiki, Yuki Sato   +8 more
doaj   +1 more source

Seismic characterization of pyroclastic flow activity at Soufrière Hills Volcano, Montserrat, 8 January 2007 [PDF]

Natural Hazards and Earth System Sciences, 2007
A partial dome collapse with concurrent pyroclastic flow (PF) activity occurred at Soufrière Hills Volcano (SHV), Montserrat on 8 January 2007. Pyroclastic density currents were observed to propagate from the Northwest and West sectors of the summit dome
S. De Angelis, V. Bass, V. Hards, G. Ryan   +3 more
doaj  

ASHEE: a compressible, equilibrium-Eulerian model for volcanic ash plumes [PDF]

, 2015
A new fluid-dynamic model is developed to numerically simulate the non-equilibrium dynamics of polydisperse gas-particle mixtures forming volcanic plumes. Starting from the three-dimensional N-phase Eulerian transport equations for a mixture of gases and
Berselli, Luigi Carlo, Cerminara, Matteo, Ongaro, Tomaso Esposti   +2 more
core   +4 more sources

Analysis of Optical Satellite Images and Pyroclastic Flow Inundation Model for Monitoring of Pyroclastic Flow Deposit Area [PDF]

Korean Journal of Remote Sensing, 2014
Field survey research on damages caused by volcanic activities has plenty of difficulties due to human resources, safety and costs issues. Remote sensing application using satellite image is one of very useful tools to overcome those issues. In this study, we monitored the volcanic activities of Sinabung volcano in 2010, which is located in Sumatra ...
Minji Cho, Saro Lee, Chang-Wook Lee
openaire   +1 more source

Evaluating emplacement temperature of a 1000-year sequence of mass flows using paleomagnetism of their deposits at Mt. Taranaki, New Zealand

Volcanica, 2019
Temperature can be an important characteristic used to distinguish primary pyroclastic density currents or block-and-ash flows from other collapses not primarily related to an eruption, and also governs the type and level of hazard presented by these ...
Geoffrey A Lerner, Shane J Cronin, Gillian M Turner   +2 more
doaj   +1 more source

Inverting sediment bedforms for evaluating the hazard of dilute pyroclastic density currents in the field

Scientific Reports, 2021
Pyroclastic density currents are ground hugging gas-particle flows associated to explosive volcanic eruptions and moving down a volcano's slope, causing devastation and deaths.
Pierfrancesco Dellino, Fabio Dioguardi, Anna Rinaldi, Roberto Sulpizio, Daniela Mele   +4 more
doaj   +1 more source

Terrestrial analogs and thermal models for Martian flood lavas [PDF]

, 2000
The recent flood lavas on Mars appear to have a characteristic “platy-ridged” surface morphology different from that inferred for most terrestrial continental flood basalt flows.
A. S. McEwen, Arya, Bird, Booth, Cattermole, Crisp, Crisp, Davies, Edgett, Edgett, Fink, Glaze, Goncharov, Greeley, Greeley, Greeley, Harmon, Harmon, Hartmann, Hartmann, Hartmann, Hill, Hon, Hooper, Hulme, Jakobsson, Jerram, Keszthelyi, Keszthelyi, Keszthelyi, Keszthelyi, Keszthelyi, Keszthelyi, Kilburn, L. Keszthelyi, Macdonald, Macdougall, Malin, Mangan, Martin, McEwen, McEwen, McEwen, McEwen, Mouginis-Mark, Muhleman, Oskarsson, Peterson, Pieri, Plescia, Reidel, Rowland, Sakimoto, Sakimoto, Scott, Scott, Self, Self, Shaw, Smith, Spence, Steingrímsson, Stephenson, Swanson, T. Thordarson, Theilig, Thorarinsson, Thordarson, Thordarson, Thordarson, Tolan, Wadge, Walker, Ward, Wilson, Wilson, Woods, Zielinski   +77 more
core   +1 more source

Flow rule, self-channelization and levees in unconfined granular flows [PDF]

, 2006
Unconfined granular flows along an inclined plane are investigated experimentally. During a long transient, the flow gets confined by quasistatic banks but still spreads laterally towards a well-defined asymptotic state following a nontrivial process ...
A. Mangeney-Castelnau, B. Andreotti, E. Lajeunesse, G. D. R. Midi, O. Dauchot, S. Deboeuf   +5 more
core   +3 more sources

Topographical controls on small‐volume pyroclastic flows

Sedimentology, 2019
AbstractEmplacement of small‐volume (<0·1 km3) pyroclastic flows is significantly influenced by topography. The Arico ignimbrite on Tenerife (Canary Islands) is a characteristic small‐volume pyroclastic flow deposit emplaced on high relief topography. The pyroclastic flow flowed down pre‐existing valleys on the southern slopes of the island.
Martí Molist, Joan, Doronzo, Domenico Maria, Pedrazzi, Dario, Colombo Piñol, Ferrán   +3 more
openaire   +2 more sources

High Potash Volcanic Rocks and Pyroclastic Deposits of Damavand Volcano, Iran, an Example of Intraplate Volcanism [PDF]

Journal of Sciences, Islamic Republic of Iran, 2017
Damavand is a fascinating dormant stratovolcano, 60 km to the ENE of Tehran located in the Alborz Mountains. Damavand volcanic products consist of lava flows and pyroclastic fall, flow and surge deposits from different eruption cycles. The volcanic rocks
M. Mortazavi
doaj