Títol:
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GPS studies of active deformation in the Pyrenees
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Autor/a:
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Asensio Ferreira, Eva; Khazaradze, Giorgi; Echeverria Moreno, Ana; King, R. W.; Vilajosana Guillén, Ignasi
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Altres autors:
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Universitat de Barcelona |
Abstract:
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The Pyrenees mountain belt, which separates the Iberian Peninsula from the rest of the European continent, is part of the Alpine Himalayan orogenic belt, formed as a result of a collision between the African and Eurasian Plates. Although the instrumental seismicity in the Pyrenees is moderate, in the past centuries a number of destructive earthquakes have occurred, which could indicate continuing tectonic activity of the area. We analyse GPS observations spanning 3.5 yr from 35 continuous stations in the Pyrenees region and find significant on-going extension perpendicular to the range at 2.5 ± 0.5 nstrain yr 1, with the possibility of higher strain rates concentrated in the westernmost part of the range. This finding is in agreement with the predominantly normal faulting focal mechanisms of earthquakes that occur in the area and suggests a recurrence time for magnitude 6.5 earthquakes of 2200 2500 yr. |
Matèries:
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-Sistema de posicionament global -Pirineus -Global Positioning System -Pyrenees |
Drets:
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(c) Asensio Ferreira, Eva et al., 2012
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Tipus de document:
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Article Article - Versió publicada |
Publicat per:
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Royal Astronomical Society
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