Results 21 to 30 of about 623,895 (284)

Fluid Outflows From Venus Impact Craters: Analysis From Magellan Data [PDF]

, 1992
Many impact craters on Venus have unusual outflow features originating in or under the continuous ejecta blankets and continuing downhill into the surrounding terrain. These features clearly resulted from flow of low-viscosity fluids, but the identity of
Asimow, Paul D., Wood, John A.
core   +1 more source

Characterizing lithological, weathering, and hydrothermal alteration influences on volcanic rock properties via spectroscopy and laboratory testing: a case study of Mount Ruapehu volcano, New Zealand

Bulletin of Volcanology, 2023
The geomechanical characterization of volcanic material has important implications for geothermal and mineral exploration, engineering design, geophysical signals of volcano unrest, and models of instability and mass flows.
L. Schaefer, G. Kereszturi, B. Kennedy, M. Villeneuve   +3 more
semanticscholar   +1 more source

Large-magnitude (VEI ≥ 7) ‘wet’ explosive silicic eruption preserved a Lower Miocene habitat at the Ipolytarnóc Fossil Site, North Hungary

Scientific Reports, 2022
During Earth’s history, geosphere-biosphere interactions were often determined by momentary, catastrophic changes such as large explosive volcanic eruptions.
Dávid Karátson, Tamás Biró, Maxim Portnyagin, Balázs Kiss, Jean-Louis Paquette, Zoltán Cseri, Mátyás Hencz, Károly Németh, Pierre Lahitte, Emő Márton, László Kordos, Sándor Józsa, Lilla Hably, Samuel Müller, Imre Szarvas   +14 more
doaj   +1 more source

The fragmentation threshold of pyroclastic rocks [PDF]

Earth and Planetary Science Letters, 2004
In response to rapid decompression, porous magma may fragment explosively. This occurs when the melt can no longer withstand forces exerted upon it due to the overpressure in included bubbles. This occurs at a critical pressure difference between the bubbles and the surrounding magma. In this study we have investigated this pressure threshold necessary
Oliver Spieler, Ben Kennedy, Ulrich Kueppers, Donald B. Dingwell, Bettina Scheu, Jacopo Taddeucci   +5 more
openaire   +1 more source

Maars to calderas. End-members on a spectrum of explosive volcanic depressions [PDF]

, 2015
We discuss maar-diatremes and calderas as end-members on a spectrum of negative volcanic landforms (depressions) produced by explosive eruptions (note—we focus on calderas formed during explosive eruptions, recognizing that some caldera types are not ...
Palladino, Danilo Mauro, Sottili, Gianluca, Taddeucci, J., Valentine, G. A.   +3 more
core   +1 more source

Assessing minimum pyroclastic density current mass to impact critical infrastructures: example from Aso caldera (Japan)

Natural Hazards and Earth System Sciences, 2022
. We describe a method for calculating the probability that a distal geographic location is impacted by a pyroclastic density current (PDC) of a given size, considering the key related uncertainties.
A. Bevilacqua, A. Aravena, W. Aspinall, A. Costa, S. Mahony, A. Neri, S. Sparks, B. Hill   +7 more
semanticscholar   +1 more source

Mineralogical properties of pyroclastic materials from Mount Merapi, Indonesia [PDF]

BIO Web of Conferences
Mount Merapi, located in Indonesia, is known as one of the most active volcanoes globally, often resulting in volcanic eruptions that produce pyroclastic materials.
Kurniati, Suwardi, Mulyanto Budi, Nugroho Budi, Herman Welly, Rahmayuni Erlina   +5 more
doaj   +1 more source

Interpretation of Bouguer Anomaly to Determine Fault and Subsurface Structure at Blawan-ijen Geothermal Area [PDF]

, 2016
Gravity survey has been acquired by Gravimeter Lacoste & Romberg G-1035 at Blawan-Ijen geothermal area. It was a focusing study from previous research.
Azhari, A. P. (Anjar), Maryanto, S. (Sukir), Rachmansyah, A. (Arief)   +2 more
core   +1 more source

Rock characteristics of post-caldera volcanoes in Dieng volcanic complex (DVC), Central Java, Indonesia

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2022
The Dieng volcanic complex (DVC) has one of the densest post-caldera volcanisms activity presents in Indonesia, yet its population density is considerably high.
Indranova Suhendro, Muhammad Nadafa Isnain, Rizky Wahyudi   +2 more
doaj   +1 more source

A comprehensive paleomagnetic study from the last Plinian eruptions of Popocatepetl volcano: absolute chronology of lavas and estimation of emplacement temperatures of PDCs

Earth, Planets and Space, 2019
Three lava flows (Buenavista, Xalitzintla and Nealtican) and pyroclastic density currents (Lorenzo and Pink Pumice) from two Popocatepetl Plinian eruptions were sampled for paleomagnetic dating.
Nayeli Pérez-Rodríguez, Juan Morales, Avto Goguitchaichvili, Felipe García-Tenorio   +3 more
doaj   +1 more source