The GPS strain rate field in the Aegean Sea and western Anatolia

The GPS velocity field of the Aegean Sea and western Anatolia is used to determine crustal deformation strain rates for the period 1988 to 1996. The zone from the Marmara Sea to the North Aegean Trough is associated with strong right‐lateral shear motion, with maximum strain rates of 170 nstrain/a....

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Bibliographic Details
Published in:Geophysical research letters 1999-08, Vol.26 (16), p.2513-2516
Main Authors: Kahle, Hans-Gert, Cocard, Marc, Peter, Yannick, Geiger, Alain, Reilinger, Robert, McClusky, Simon, King, Robert, Barka, Aykut, Veis, George
Format: Article
Language:English
Subjects:
Brackish
Earth sciences
Earth, ocean, space
Exact sciences and technology
Freshwater
Internal geophysics
Marine
Solid-earth geophysics, tectonophysics, gravimetry
Tectonics. Structural geology. Plate tectonics
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Summary:The GPS velocity field of the Aegean Sea and western Anatolia is used to determine crustal deformation strain rates for the period 1988 to 1996. The zone from the Marmara Sea to the North Aegean Trough is associated with strong right‐lateral shear motion, with maximum strain rates of 170 nstrain/a. In the northern Aegean Sea the extensional deviatoric axes are oriented NNE‐SSW, associated with strain rates reaching 150 nstrain/a, and in western Anatolia varying around N‐S with rates of up to 95 nstrain/a. The extensional areas mostly coincide with active graben features. The south‐western Aegean Sea is almost strain‐free. In general, the areas of high geodetic strain rates are accompanied by distinct seismic clusters whereas the strain‐free regions are nearly aseismic.
ISSN:0094-8276
1944-8007
DOI:10.1029/1999GL900403