An inverse problem applied to volcanology is studied. It consists in the determination of variable pressure a crack order fit observed ground displacements. The deformation volcano assumed be governed by linear elasticity. direct solved via fictitious domain method, using finite element discretization XFEM type. misfit minimized combination decomposition and optimatily conditions. gradient cost...

The event bush is a new formalism for organizing knowledge in various fields of geoscience, particularly suitable for hazard assessment purposes. Acting as an intermediary between expert knowledge and the well-established field of Bayesian belief networks, the event bush allows at the same time a variety of other applications, linking geoscientific knowledge to the field of artificial intellige...

Abstract Based on data from the Center for Volcanology and Geological Hazard Mitigation in April 2021, South Padang District has potential high land movement vulnerability. This is due to intensity of rainfall, geological conditions area generally a hilly area. The location Padang, especially Gado-Gado Hill area, residential tourist attraction. Therefore, it necessary know vulnerability minimiz...

A 10 μm particle of cuprous gold was found in the phosphate-argillaceous matrix a three-layer Fe-Mn crust dredged from Guyot Alba Magellan Seamount (Pacific Ocean). The studied with scanning electron microscope at Institute Volcanology and Seismology, Far East Branch Russian Academy Sciences. is represented by an admixture platinum (up to 3.1 wt % Cu up 1.7 Pt). composition impurities suggests ...

Abstract To quantify the size of tephra, two practical challenges must be addressed: wide range particle sizes (10−8 - 101 m) and diversity shape, density optical properties. Here we use dynamic image analysis (DIA) to simultaneously characterise shape tephra samples from Mount Mazama, Krafla, St. Helens Campi Flegrei. The Camsizer X2 instrument used in this study, which has a measurement 0.8 μ...

Disaster Management Agency (BNPB) reported more than 100 landslide cases in the Bogor area from January to April 2018. Topography and high rainfall intensity are predicted as main factor occurrence Bogor. This study aims develop vulnerability map evaluate its accuracy based on field's points. The methods proposed by Directorate of Volcanology Mitigation, namely DVMBG 2004 2005, used this study....

The use of secular variation in Earth’s magnetic field for dating purposes archeology and volcanology began with the first developments paleomagnetism. This paper traces key contributions Paul-Louis Mercanton, Pierre David, Bernard Brunhes, Raymond Chevallier early 20th century, between seminal works Giuseppe Folgheraiter 1890s Emile Thellier 1930s, all whom expressed a strong interest these ap...