Showing papers in "Journal of Volcanology and Geothermal Research in 2021"

TL;DR: In this article, the authors use recent (2010−2020) observations at Campi Flegrei caldera (CFc) to show hydrothermal pressure, gas emission and seismicity at CFc share common source areas and well-matching temporal evolutions.

TL;DR: In this article, the authors present an overview of explosive volcanism on Mars from both observational and theoretical perspectives and discuss the implications of explosive eruptions for the evolution of the Red Planet.

TL;DR: In this article, the authors present and promote innovative low-cost low-power UAV surveying for volcanic geomorphology and volcanic hazards in the tropics with heavy rainfall, deep volcanic soils and high relief.

TL;DR: In this article, the authors integrated data from satellites (including Sentinel-2, TROPOMI, MODIS, and Himawari-8), the International Monitoring System (IMS) infrasound network, and global lightning detection network (GLD360) with information from local authorities and social media to retrospectively characterize the eruptive sequence and improve understanding of the pre-, syn- and post- eruptive behavior.

TL;DR: In this paper, the authors use dynamic image analysis (DIA) to simultaneously characterise the size and shape of tephra samples from Mount Mazama, Krafla, Mount St. Helens and Campi Flegrei.

TL;DR: This work constitutes a decision tool that can be directly applied to a volcanic system of interest to determine which eruption forecasting methods are possible, plausible, and with what implementation steps.

TL;DR: The Independent Volcanic Eruption Source Parameter Archive (IVESPA, ivespacouk) as mentioned in this paper is a community effort endorsed by the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) Commission on Tephra Hazard Modelling.

TL;DR: This system operates in quasi-realtime, which is able to process records of 20min, accordingly to the requirements of the Instituto Geofisico de la Escuela Politecnica Nacional, with a recognition (detection + classification) time response of one minute, approximately.

TL;DR: In this article, a constitutive mathematical model for the evolution of permeability in welding volcanic systems based on percolation theory is presented. But the model is theoretically grounded and has no fitting parameters, hence it should be valid across all magma compositions.

TL;DR: In this article, the authors reported results of a multi-method zircon petrochronologic (U--Pb, O--Hf isotopes, trace elements) investigation of six ignimbrites, lavas, and associated granodioritic porphyries from these localities.

TL;DR: In this article, the authors synthesize available data on these historical eruptions, focusing on their physical characteristics and chronological development, and provide new estimates of eruption parameters, such as lava flow runout, area and volume, to inform volcanic hazard assessment in the archipelago.

TL;DR: In this article, a method to calculate the complex refractive indices of volcanic ashes at wavelengths from 5 to 15μm from measurements of their individual components based on generic petrological ash compositions is introduced.

TL;DR: In this article, the authors investigate elasto-plastic deformation and stress patterns in the intermediate bedrock space between the reservoir and the fault zone and test how shear stress, volumetric strain, and plastic strain develop.

TL;DR: In this article, a new submarine volcano has been discovered offshore Mayotte, a part of the Comoros volcanic archipelago located between Africa and Madagascar, and a 3D velocity model was constructed to assess the deeper structure of the young volcano plumbing system, offshore and East of Mayotte.

TL;DR: In this paper, a 3D inversion of the quality off-diagonal impedance of magnetotelluric (MT) data from the Tianchi volcano was used to construct a model of the uppermost mantle resistivity.

TL;DR: In this article, the authors combined data from satellites (including Sentinel-2, TROPOMI, MODIS, Himawari-8), the International Monitoring System infrasound network, and GLD360 globally detected lightning with information from the local authorities and social media to characterize the pre-, syn- and post-eruptive behaviour.

TL;DR: In this paper, the authors used elastic damage mechanics code "rock failure process analysis" to perform numerical experiments to better understand the influence of porosity, pore diameter, and pore aspect ratio on the tensile strength of volcanic rocks.

TL;DR: In this paper, high-resolution optical and thermal infrared (TIR) data, acquired by unoccupied aircraft systems (UAS) at the La Fossa cone (Vulcan Island) in November 2018, were used to investigate the structural complexity of degassing sites and associated processes at the surface.

TL;DR: In this article, the authors used spatial analysis methods to assess exposure for both population and private transport ownership as well as to identify those areas requiring public transport support for an evacuation in the event of volcanic unrest and/or an eruption.

TL;DR: A questionnaire to survey the common petrological monitoring procedures adopted by volcano monitoring institutions has been developed, aimed at identifying prevailing techniques and rating their suitability in terms of costs versus benefits as discussed by the authors.

TL;DR: In this article, the authors present new lava dome emplacement models that use calibrated rock strengths and allow material behaviour to be simulated for three distinct units: (1) a ductile, fluid core; (2) a solid upper carapace; and (3) disaggregated talus slopes.

TL;DR: In this article, the authors used 0.01-0.5 m/pixel image data acquired from aerial surveys and small Unoccupied Aircraft Systems (sUAS) to create a 1:800-scale facies map that was ground-truthed using field observations during the summers of 2015-2019.

TL;DR: In this article, the essential role of multi-temporal unmanned aerial vehicle (UAV) images in the monitoring of Mt. Agung's lava dome, and in determining the areas of potential lahar hazards during the crisis between 2017 and 2019 is described.

TL;DR: In this article, the role of inherited structures during caldera collapse has been studied through analogue models, showing how calderas may experience asymmetry due to the lateral propagation of calderal-related faults.

TL;DR: In this article, the authors used the total content and speciation of volatiles released during the ascent and eruption of lunar mare basalt magma to model the generation and behavior of gas bubbles, the disruption of magma at shallow depth by bubble expansion, and the acceleration and dispersal of the resulting pyroclasts.

TL;DR: The dyke emplacement in the Earth's brittle crust has been studied in this article, where dyke-induced surface deformation patterns are modeled as a tensile fracture in a dominantly elastic host and the surface deformations exhibit two uplifting bulges separated by a trough parallel to, and above to the apex of, the underlying dyke.

TL;DR: Turrialba is a basaltic to andesitic Holocene stratovolcano that after decades of quiescence re-activated in 1996 and has been highly active ever since.

TL;DR: In this article, the authors report the temporal evolution of helium isotopes emission and thermal energy release in the period 2007-2018 at the summit crater of Pico do Fogo volcano, Cape Verde.

TL;DR: In this paper, the authors defined six monogenetic volcanic fields within the Central Anatolian Volcanic Province (CAVP) and analyzed a total number of 540 monogeneetic volcanoes in terms of morphological and spatial characteristics.