Horizontal crustal motion in the central and eastern Mediterranean inferred from Satellite Laser Ranging measurements

Details Horizontal crustal motion in the central and eastern Mediterranean inferred from Satellite Laser Ranging measurements Horizontal crustal motion in the central and eastern Mediterranean inferred from Satellite Laser Ranging measurements

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.1979s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 18, p. 1979-1982

Physics

33

Crustal Fractures, Earth Crust, Earth Movements, Laser Range Finders, Mediterranean Sea, Kinematics, Lageos (Satellite), Satellite-Borne Instruments, Seismology, Tectonics

Scientific paper

Four campaigns to acquire Satellite Laser Ranging (SLR) measurements at sites in the Mediterranean region have been completed. These measurements to the LAGEOS satellite, made largely by mobile systems, cover a time span beginning in November 1985 and ending in June 1993. The range data from 18 sites in the central and eastern Mediterranean have been simultaneously analyzed with data acquired by the remainder of the global laser tracking network. Estimates of horizontal motion were placed into a regional, northern Europe-fixed, kinematic reference frame. Uncertainties are on the order of 5 mm/yr for sites having at least four occupations by mobile systems and approach 1 mm/yr for permanently located sites with long histories of tracking. The resulting relative motion between sites in the Aegean exhibit characteristics of broadly distributed pattern of radial extension, but at rates that are about 50% larger than those implied from studies of seismic strain rates based on seismicity of magnitude 6 or greater or across the region. The motion estimated for sites in Turkey exhibit velocity components associated with the westward motion of the Anatolian Block relative to Eurasia. These results provide a present-day 'snapshot' of ongoing deformational processes as experienced by the locations occupied by SLR systems.

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