Author/Authors :
Zitellini، نويسنده , , N. and Gràcia، نويسنده , , E. and Matias، نويسنده , , L. and Terrinha، نويسنده , , P. and Abreu، نويسنده , , M.A. and DeAlteriis، نويسنده , , G. and Henriet، نويسنده , , J.P. and Daٌobeitia، نويسنده , , J.J. and Masson، نويسنده , , D.G. and Mulder، نويسنده , , T. and Ramella، نويسنده , , R. and Somoza، نويسنده , , L. and Diez، نويسنده , , S.، نويسنده ,
Abstract :
The missing link in the plate boundary between Eurasia and Africa in the central Atlantic is presented and discussed. A set of almost linear and sub parallel dextral strike–slip faults, the SWIM11SWIM is the acronym of the ESF EuroMargins project “Earthquake and Tsunami hazards of active faults at the South West Iberian Margin: deep structure, high-resolution imaging and paleoseismic signature”.
s, that form a narrow band of deformation over a length of 600 km coincident with a small circle centred on the pole of rotation of Africa with respect to Eurasia, was mapped using a new swath bathymetry compilation available in the area offshore SW Portugal. These faults connect the Gloria Fault to the Rif–Tell Fault Zone, two segments of the plate boundary between Africa and Eurasia. The SWIM faults cut across the Gulf of Cadiz, in the Atlantic Ocean, where the 1755 Great Lisbon earthquake, M ~ 8.5–8.7, and tsunami were generated, providing a new insight on its source location.
Keywords :
Great Lisbon earthquake , Africa–Eurasia plate boundary , Gulf of Cadiz , NUBIA , Iberia
