News Archivi - Pagina 5 di 57 - Istituto Nazionale di Geofisica e Vulcanologia

Thermal transient PDC behavior induced by topographic drops: A test case at Mt. St. Helens, USA

Schematic cartoon summarizing the transient process induced by a topographic drop. A recirculation zone with a typical transient time (τ) forms when the size of the current (Η) is comparable with the drop height (J). Such configuration alters the PDC internal flow structure, as exemplified by temperature (Τ) and velocity…

Short-term magma-carbonate interaction: A modelling perspective

Figura 1. Conceptual drawing of short-term magma-carbonate interaction. a) The magma can pick up fragments of carbonate rocks as it rises to the surface; b) the melt shell around the clast is contaminated in CaO and CO2 and CO2-rich gas bubbles nucleate and grow at the melt-clast interface; c) the…

ELICIPY 1.0: A Python online tool for expert elicitation

Figure 4c. Example of target question 1 of an international elicitation carried out in 2019 and re-analyzed with elicipy. We include experts’ answers as well as the Decision Maker solutions of the Cooke Classical Model, the Expert Relative Frequency, and the Equal Weight. de’ Michieli Vitturi M., A. Bevilacqua, A. Tadini,…

The March 2023 UAS-based high-resolution Digital Surface Model and orthomosaic of the NE flank of Stromboli volcano (Sicily, Italy)

Figure 4. Details of hillshaded DSM and orthophotos at different scales. a) and b) the San Bartolo church. c) and d) the panoramic point at 290 m a.s.l. along the path. Nannipieri L, A. Bevilacqua, F. Di Traglia, M. Favalli, A. Fornaciai (2023). Annals of Geophysics. https://www.annalsofgeophysics.eu/index.php/annals/article/view/8982…

Post-caldera eruptions at the Valles Caldera, New Mexico (USA)

SEMINARIO: Speaker: Amanda ClarkeAffiliation: Arizona State University (School of Earth and Space Exploration)Date: 13th December 2023Time: 11:00 AMHosted by: INGV Sezione di Pisa Abstract Many calderas remain restless after large-volume eruptions, and Valles caldera is a classic example of a restless, resurgent caldera. The Valles caldera…

Assessment of eruption source parameters using infrasound and plume modelling: a case study from the 2021 eruption of Mt. Etna, Italy

Model and satellite image of the ash plume during paroxysmal activity at Mt. Etna on 20 June, 2023. (a) Map view of the modelled plume showing ash drifting towards the East; (b) Cross-section (West–East) view of the modelled plume for values of flow velocity of 50, 75 and 125 m/s. Solid…