GPS-derived strain rate field within the boundary zones of the Eurasian, African, and Arabian Plates

Kahle, HG; Cocard, M; Peter, Y; Geiger, A; Reilinger, R; Barka, A; Veis, G

dc.contributor.author	Kahle, HG	en
dc.contributor.author	Cocard, M	en
dc.contributor.author	Peter, Y	en
dc.contributor.author	Geiger, A	en
dc.contributor.author	Reilinger, R	en
dc.contributor.author	Barka, A	en
dc.contributor.author	Veis, G	en
dc.date.accessioned	2014-03-01T01:15:38Z
dc.date.available	2014-03-01T01:15:38Z
dc.date.issued	2000	en
dc.identifier.issn	0148-0227	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13633
dc.subject	Strain Rate	en
dc.subject.classification	Geochemistry & Geophysics	en
dc.subject.other	ACTIVE CRUSTAL DEFORMATION	en
dc.subject.other	POSITIONING SYSTEM MEASUREMENTS	en
dc.subject.other	WESTERN MEDITERRANEAN RIDGE	en
dc.subject.other	KOZANI-GREVENA EARTHQUAKE	en
dc.subject.other	NORTH ANATOLIAN FAULT	en
dc.subject.other	MARMARA SEA REGION	en
dc.subject.other	CENTRAL AEGEAN SEA	en
dc.subject.other	HELLENIC ARC	en
dc.subject.other	CENTRAL GREECE	en
dc.subject.other	MIDDLE-EAST	en
dc.title	GPS-derived strain rate field within the boundary zones of the Eurasian, African, and Arabian Plates	en
heal.type	journalArticle	en
heal.identifier.primary	10.1029/2000JB900238	en
heal.identifier.secondary	http://dx.doi.org/10.1029/2000JB900238	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	We use the GPS velocity field (1988-1998) for eastern Mediterranean and Asia Minor to determine the crustal deformation strain rate field in an area bounded by 35 degrees N and 43 degrees N, and 20 degrees E and 48 degrees E. We calculate the normal and shear strain rate components associated with the major faults and compare these qualitatively with seismological data. Uncertainties in the calculation of the strain rates reach 50 nstrain yr(-1) in sparsely observed parts of Anatolia, whereas we estimate errors < 20 nstrain yr(-1) in the Aegean and Marmara regions. The largest compressional strain rate components in the eastern part of the study area occur along the Greater Caucasus mountain front reaching 70 nstrain yr(-1). (1 nstrain yr(-1) = 0.0317 x 10(-15) s(-1)). The North Anatolian Fault Zone is the dearest feature in the shear strain rate field. It is expressed as a pronounced dextral strike-slip fault zone, reaching rates of up to 170 nstrain yr(-1). This holds true also for the Izmit area, where the August 17, 1999, earthquake occurred. Central Anatolia is almost strain-free, whereas extension prevails in western Anatolia. The principal axes of extension vary around the N-S direction with strain rates of up to 85 nstrain yr(-1). These extensional areas coincide with graben features and normal faulting earthquakes. The central and southwestern Aegean Sea is strain-free with values far below 40 nstrain yr(-1). The seismic cluster around the Dodekanissa islands, southeastern Aegean Sea, coincides with NW-SE oriented extension, attaining strain rates of up to 90 nstrain yr(-1). This area of extension also exhibits recent active volcanism. The entire Hellenic are shows compressional strain rates perpendicular to the are. The Pliny-Strabo troughs along the eastern segment of the are show left-lateral shear strain rates reaching 80 nstrain yr(-1) Significant extension is found in central Greece, with a NNE-SSW oriented maximum of 120 nstrain yr(-1) centered around the Gulf of Corinthos. The Kephalonia Fault Zone in NW Greece is a distinct dextral fault zone, separating Apulia from the rapidly moving Aegean microplate. Right-lateral shear strain rates reach 150 nstrain yr(-1).	en
heal.publisher	AMER GEOPHYSICAL UNION	en
heal.journalName	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH	en
dc.identifier.doi	10.1029/2000JB900238	en
dc.identifier.isi	ISI:000089895700002	en
dc.identifier.volume	105	en
dc.identifier.issue	B10	en
dc.identifier.spage	23353	en
dc.identifier.epage	23370	en