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Velocity and structural model of the Lower Tagus Basin according to the study o...
Torres, Ricardo; Furtado, Augusto; Silva, Hugo; Borges, JF; Caldeira, Bento; Bezzeghoud, Mourad; Carvalho, JoãoAlong 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
Borges, J. F.; Torres, Ricardo; Furtado, Augusto; Silva, Hugo; Bezzeghoud, Mourad; Caldeira, Bento; Pinto, CarlosThroughout 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...
Inversão de Registos de Ruído Sísmico Ambiental para Determinação do Modelo de ...
Borges, José; Furtado, Augusto; Bezzeghud, Mourad; Caldeira, Bento; Silva, HugoThe Lower Tagus Valley is located in the Lower Tagus Sedimentary Basin. The occurrence of earthquakes in this area indicates the presence of seismogenic structures at depth that are still deficiently known due to a thick Cenozoic sedimentary cover. To confirm the velocity model obtained by geophysical and geological data, we use broad-band microtremor measurements and the horizontal to vertical (H/V) spectral r...
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