159 documents found, page 1 of 16
Integrated Seismic and Geodetic Monitoring of the Recent Seismo- Volcanic Activ...
Borges, José; Caldeira, Bento; Oliveira, RuiOn March 19, 2022, at 17:11 UTC IPMA recorded the onset of a seismic swarm character-ized by a high event frequency in the initial hours, reaching up to 700 events per hour, with magnitudes ranging from low to moderate and a maximum magnitude of 4.0 ML. According to the IPMA catalog, the epicenters are distributed along a trend roughly aligned with the island's orientation, forming a strip between Velas and Pic...
Soil conditions influence the advancement of first cork stripping in fertirriga...
Camilo-Alves, Constança; Caldeira, Bento; Nunes, José António; Poeiras, Ana; Ribeiro, João; Maymone, Marta; Vaz, Margarida; Barroso, JoãoIntroduction: Fertirrigation in cork oak plantations is a novel approach intended to accelerate growth until trees reach productive maturity, after which they are expected to be managed under rainfed conditions. This study investigated how site quality influenced the timing of the first stripping in a fertirrigated stand. Methods: REGASUBER is a 6-hectare experimental plot located in Coruche, Portugal, installe...
Unconventional Three-Dimensional Active Seismic Tomography Applied in the Lousa...
Hamak, Ines; Teixeira, Pedro; Borges, José; Koulakov, Ivan; Oliveira, Rui; Caldeira, Bento; Bezzeghoud, Mourad; Matos, João X.; Andringa, SofiaThe Lousal Mine (Iberian Pyrite Belt, Portugal) was operated from 1900 to 1988 for the extraction of massive sulphides and was later rehabilitated as a science museum. It was selected as a test site for underground muon tomography applied to geophysical surveys, as part of the LouMu project. This study focuses on seismic tomography to analyse the sub- surface above the mine gallery, primarily surveyed by a muog...
Provas de Agregação emCiências da Terra e do Espaço, especialidade Geofísica de...
Caldeira, BentoDocumentos apresentados para requerer provas de agregação: CV, relatório de unidade, sumário de seminário a apresentar e cinco trabalhos selecionados
Soil Classification Maps for the Lower Tagus Valley Area, Portugal, Using Seism...
Carvalho, João; Dias, Ruben; Borges, José Fernando; Quental, Lídia; Caldeira, BentoABSTRACT: The Lower Tagus Valley (LTV) region has the highest population density in Portugal, with over 3.7 million people living in the region. It has been struck in the past by several historical earthquakes, which caused significant economic and human losses. For a proper seismic hazard evaluation, the area needs detailed V-s30 and soil classification maps. Previously available maps are based on proxies, or ...
Unconventional Three-Dimensional Active Seismic Tomography Applied in the Lousa...
Hamak, Ines; Teixeira, Pedro; Borges, José Fernando; Koulakov, Ivan; Oliveira, Rui Jorge; Caldeira, Bento; Bezzeghoud, Mourad; Xavier Matos, João ManuelABSTRACT: The Lousal Mine (Iberian Pyrite Belt, Portugal) was operated from 1900 to 1988 for the extraction of massive sulphides and was later rehabilitated as a science museum. It was selected as a test site for underground muon tomography applied to geophysical surveys, as part of the LouMu project. This study focuses on seismic tomography to analyse the subsurface above the mine gallery, primarily surveyed b...
Muography Applied in Underground Geological Surveys: Ongoing Work at the Lousal...
Teixeira, Pedro; Blanco, Alberto; Caldeira, Bento; Tomé, Bernardo; Alexandre, Isabel; Matos, João; Silva, Jorge; Borges, José; Cazon, LorenzoThe LouMu Project is an ongoing collaboration between the Laboratory of Instrumentation and Experimental Particle Physics (LIP), the Institute of Earth Sciences—University of Évora and the Lousal Ciência Viva Center which is evaluating the muography potential in the Lousal Mine, with the general aim to create the conditions to use muography as a novel method for geophysical surveys in Portugal. The National Lab...
Advanced Geophysical Processing of Ground-Penetrating Radar and Magnetic Datasets
Oliveira, Rui Jorge; Caldeira, Bento; Teixidó, Teresa; Borges, José FernandoDue to the presence of an excessive amount of noise in the data, archeological geophysics frequently produces results that cannot be used to evaluate the content that may exist in the subsurface. If it is impossible to differentiate between signal and noise, excessive noise will result. Its genesis, when it is attributable to heterogeneities in the ground (overthrows, corners) that produce as many reflections a...
Muon tomography with Resistive Plate Chambers for geological characterization
Sarmento, Raul; Castro, Alberto Blanco; Caldeira, Bento; Tomé, Bernardo; Loureiro, Custódio; Clemêncio, Filomena; Costa, João; Matos, JoãoMuon tomography is one of several fields of applied physics that have witnessed the successful use of particle detection based on Resistive Plate Chambers (RPC). In this work, we report on an innovative project concerning transmission muography for geological characterization. For this purpose, a muon telescope built of four RPC planes was mounted on an adjustable structure and the telescope's response to atmos...
Tools for managing metal contaminated areas: multidisciplinary approach to deve...
Oliveira, Rui Jorge; Caldeira, Bento; Palma, Patrícia; Costa, Maria João; Fialho, AnaThis work aims to develop an environmental management model specifically designed for mining areas that have been contaminated by toxic metals. A sustainable management model is suggested to be established, utilizing a combination of developed tools. This model will provide tools and strategies to effectively manage and mitigate the environmental impact of such contamination, with the goal of promoting an incre...