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Velocity and structural model of the Lower Tagus Basin according to the study o...

Along his history the Lower Tagus Valley (LTV) region was shaken by several earthquakes, some of them produced in large ruptures of offshore structures located southwest of the Portuguese coastline. Among these is the Lisbon earthquake of 1 November 1755 (M∼8.5-8.7), and other moderates earthquakes that were produced by local sources such as the 1344 (M6.0), 1531 (M7.1) and 1909 (M6.0) earthquakes. Previous sim...

Seismic ground motion scenarios in Lower Tagus Valley Basin

Throughout its history the Lower Tagus Valley (LTV) has been struck by several earthquakes which produced important material damage and loss of lives: The 1st of November 1755 Lisbon earthquake and the 1969 earthquake (Mw=7.3), located in the SW Iberia Margin and the 1344, 1531 and 1909 (M= 6 to 7) with epicenter located inside the LTV basin. Since this region is the most highly populated region in Portugal, it...

Optimal representation of our knowledge about seismic sources for PSHA in low d...

characterization of the seismic sources, the definition of the attenuation law and the computation of the probabilistic seismic hazard. Our work is focus on the first two steps. Given that most active faults are not characterized well enough, in low deformation areas, seismic sources are generally defined as areal zones, delimited with finite boundary polygons, within which the geological features of active tec...

Estudo da fonte do sismo do Haiti de 12 de janeiro de 2010 a partir de combinaç...

Neste trabalho é apresentada uma metodologia baseada no cruzamento de técnicas e dados sísmicos (ondas de volume com registo telessísmico por estações de banda larga) e geodésicos (SAR - Radar de Abertura Sintética) com o intuito de estudar o complexo processo de ruptura do sismo do Haiti de 12 de Janeiro de 2010. Esta metodologia baseia-se: 1) na análise da diretividade para estimar a direção e a velocidade mé...

Seismic and structural geology constraints to the selection of CO2 storage site...

The Lusitanian sedimentary basin, in Portugal, has a complex tectonic history and a seismic activity determined by the proximity to the Eurasian – Nubian tectonic plate boundary. Seismic activity and geological structure impose serious constraints to the selection of CO2 storage sites. This article focuses on the constraints imposed by active seismicity, geological structure and, as a direct consequence of the ...

Velocity and structural model of the Lower Tagus Basin according to the study o...

Low frequency modeling of ground motion in the Lower Tagus Valley Basin

Validation of the Lower Tagus Valley velocity and structural model using ambien...

Electrification Processes during Solid Fracture Causing Electromagnetic Emissions

Solution of Maxwell equations with fracture

Physics of Seismo-electromagnetic Phenomena

The seismo-electromagnetic phenomena (SEMG) are integrated in a relatively recent research field that studies diverse phenomena such as: unusual seismo-electrical signals [1], abnormal ultra-low-frequency (ULF) seismo-electromagnetic emissions [2], very-low-frequency (VLF) and low-frequency (LF) radiobroadcast anomalies associated with ionosphere perturbations [3], variation of total electron content of the ion...