17 documents found, page 1 of 2
The Portuguese National Seismic Network —Products and Services
Carrilho, F.; Custodio, S.; Bezzeghoud, M.; Oliveira, C. S.; Marreiros, C.; Vales, D.; Alves, P.; Pena, A.; Madureira, G.; Escuer, M.; Silveira, G.Portugal, located in the southwest region of the Eurasian plate, has been affected by several destructive earthquakes throughout its history, the most well-known being the 1755 Great Lisbon earthquake. The seismicity of the territory, both in the mainland and in the Azores and Madeira islands, has prompted the continuous development of seis- mic monitoring, from the first known macroseismic inquiry, following t...
Earthquakes in western Iberia: improving the understanding of lithospheric defo...
Custódio, Susana; Dias, Nuno; Carrilho, F.; Góngora, E.; Rio, I.; Marreiros, Célia; Morais, Iolanda; Alves, P.; Matias, LuísMainland Portugal, on the southwestern edge of the European continent, is located directly north of the boundary between the Eurasian and Nubian plates. It lies in a region of slow lithospheric deformation (< 5 mm yr(-1)), which has generated some of the largest earthquakes in Europe, both intraplate (mainland) and interplate (offshore). Some offshore earthquakes are nucleated on old and cold lithospheric mantl...
Ambient Noise Recorded by a Dense Broadband Seismic Deployment in Western Iberia
Custodio, S.; Dias, N. A.; Caldeira, B.; Carrilho, F.; Carvalho, Sara; Corela, C.; Diaz, J.; Narciso, J.; Madureira, G.; Matias, L.; Haberland, C.The West Iberia Lithosphere and Asthenosphere Structure (WILAS) project densely covered Portugal with broadband seismic stations for 2 yrs. Here we provide an overview of the deployment, and we characterize the network ambient noise and its sources. After explaining quality control, which includes the assessment of sensor orientation, we characterize the background noise in the short‐period (SP), microseismic, ...
ShakeMap: Combinação de observações instrumentais e macrossísmicas
Marreiros, C.; Carvalho, Sara; Alves, P. M.; Custódio, S.; Carrilho, F.Since 2008, the Portuguese seismological service, has implemented the ShakeMap software package provided by U.S. Geological Survey (USGS), in order to obtain reliable maps of peak ground motion parameters and seismic intensities for mainland Portugal. These maps identify the area affected by the earthquake and estimate the severity of ground shaking, thus providing important information for emergency response p...
The ALERT-ES Project: an Earthquake Early Warning System for S. Iberia
Buforn, E.; Carranza, M.; Udías, A.; Goula, X.; Colom, Y.; Roca, A.; Zollo, A.; Lozano, L.; Pro, C.; Carrilho, F.; Hanka, W.; Madariaga, R.The main goal of the ALERT-ES project (“Sistema de Alerta Sísmica Temprana: Aplicación al Sur de España”) is to study the feasibility of an Earthquake Early Warning System (EEWS) for SW Iberian Peninsula applied to the potentially damaging earthquakes that occur in the region of Cape S. Vicente-Gulf of Cadiz. This area is characterized by the occurrence of large earthquakes with damage in SW Iberia, such as tho...
Tsunamigenic earthquakes in the Gulf of Cadiz: fault model and recurrence
Matias, L. M.; Cunha, T.; Annunziato, A.; Baptista, Maria Ana Carvalho Viana; Carrilho, F.The Gulf of Cadiz, as part of the Azores-Gibraltar plate boundary, is recognized as a potential source of big earthquakes and tsunamis that may affect the bordering countries, as occurred on 1 November 1755. Preparing for the future, Portugal is establishing a national tsunami warning system in which the threat caused by any large-magnitude earthquake in the area is estimated from a comprehensive database of sc...
Performance of coastal sea-defense infrastructure at El Jadida (Morocco) agains...
Omira, Rachid; Baptista, Maria Ana Carvalho Viana; Leone, F.; Matias, L.; Mellas, S.; Zourarah, B.; Miranda, Jorge Miguel; Carrilho, F.; Cherel, J. PThis paper seeks to investigate the effectiveness of sea-defense structures in preventing/reducing the tsunami overtopping as well as evaluating the resulting tsunami impact at El Jadida, Morocco. Different tsunami wave conditions are generated by considering various earthquake scenarios of magnitudes ranging from M-w = 8.0 to M-w = 8.6. These scenarios represent the main active earthquake faults in the SW Iber...
The ALERT-ES Project for earthquakes in Cape San Vicente region
Buforn, E.; Mattesini, M.; Martín Dávila, J.; Goula, X.; Colom, Y.; Zollo, Z.; Udías, A.; Pazos, A.; Roca, A.; Lozano, L.; Carrilho, F.; Hanka, W.The main goal of the ALERT-ES project ("Sistema de Alerta Sismica Temprana: Aplicacion al Sur de España" ) is to study the feasibility of an Earthquake Early Warning System (EEWS) for the potentially damaging earthquakes that occur in the zone Cape S. Vicente-Gulf of Cadiz (S. Spain). This area is characterized by the occurrence of large and damaging earthquakes such as the 1755 Lisbon (Imax=X) or 1969 S. Vicen...
Recent improvements in the Broadband seismic networks in Portugal
Caldeira, B.; Carrilho, F.; Miranda, M.; Bezzeghoud, M.; Alves, I.; Silveira, G.; Villalonga, F.; Pena, J.A.Portugal, in spite of the significant earthquake region, (e.g.: Borges et al., 2001) has been operating a limited number of broadband digital seismic instruments. The older BB seismic station in a systematic and continuous operation on the country is MTE, belonging to GEOFON and locally supported by IM, which is working since 1997. To efficiently carry out the task of develop the Broadband Portuguese seismic ne...
Seismic Tomography of the Algarve Crust: Previous studies, Campaign and first data
Caldeira, Bento; Bezzeghoud, Mourad; Borges, José F.; Matias, L.; Rocha, João P.; Madureira, G.; Araújo, A.; Corela, C.; Carrilho, F.The Local Earthquake Tomography of Algarve (Portugal), the main objective of this project, will permit produces detailed images of the Algarve crust lithosphere and the mantle in terms ofseismic body waves velocity variations (Teleseismic Tomography) or absolutes velocities (Local Earthquake Tomography, LET). Through the LET of Monchique-Portimiio and Louli-Faro we expect to obtain a more detailed understanding...