5 documents found, page 1 of 1
Crustal and uppermost mantle structure near the Gloria Fault, North Atlantic, f...
Pinzón, Juan I.; Custódio, Susana; Silveira, Graça; Krüger, Frank; Mata, João; Matias, LuisIn this work, we present both 1-D and 3-D shear wave velocity (Vs) models of the oceanic crust and uppermost mantle below the Deep OCean Test ARray area, located similar to 70 km north of the central section of the Gloria Fault, in the eastern North-Atlantic Ocean. The velocity models are inferred from the dispersion of surface waves recorded on ocean bottom seismometers. Dispersion measurements are obtained fr...
Heterogeneous seismic anisotropy beneath Madeira and Canary archipelagos reveal...
Schlaphorst, David; Silveira, Graça; Mata, João; Krüger, Frank; Dahm, Torsten; Ferreira, Ana M GMid-plate upward mantle flow is a key component of global mantle convection, but its patterns are poorly constrained. Seismic anisotropy is the most direct way to infer mantle flow as well as melt distribution, yet the convection patterns associated with plume-like mantle upwelling are understudied due to limited seismic data coverage. Here, we investigate seismic anisotropy beneath the Madeira and Canary hotsp...
Upper crustal structure of Madeira Island revealed from ambient noise tomography
Matos, Catarina; Silveira, Graça; Matias, Luís; Caldeira, Rita; Ribeiro, M. Luísa; Dias, Nuno; Krüger, Frank; Santos, Telmo Bento dosWe present the first image of the Madeira upper crustal structure, using ambient seismic noise tomography. 16 months of ambient noise, recorded in a dense network of 26 seismometers deployed across Madeira, allowed reconstructing Rayleigh wave Green's functions between receivers. Dispersion analysis was performed in the short period band from 1.0 to 4.0 s. Group velocity measurements were regionalized to obtain...
Upper crustal structure of Madeira Island revealed from ambient noise tomography
Matos, Catarina; Silveira, Graça; Matias, Luís; Caldeira, Rita; Ribeiro, M. Luísa; Dias, Nuno; Krüger, Frank; Santos, Telmo Bento dosWe present the first image of the Madeira upper crustal structure, using ambient seismic noise tomography. 16 months of ambient noise, recorded in a dense network of 26 seismometers deployed across Madeira, allowed reconstructing Rayleigh wave Green's functions between receivers. Dispersion analysis was performed in the short period band from 1.0 to 4.0 s. Group velocity measurements were regionalized to obtain...
Upper crustal structure of Madeira Island revealed from ambient noise tomography
Matos, Catarina; Silveira, Graça; Matias, Luís; Caldeira, Rita; Ribeiro, Maria Luísa; Dias, Nuno; Krüger, Frank; Bento dos Santos, TelmoWe present the first image of the Madeira upper crustal structure, using ambient seismic noise tomography. 16 months of ambient noise, recorded in a dense network of 26 seismometers deployed across Madeira, allowed reconstructing Rayleigh wave Green's functions between receivers. Dispersion analysis was performed in the short period band from 1.0 to 4.0 s. Group velocity measurements were regionalized to obtain...