D-BAUG - Departement Bau, Umwelt und Geomatik - ETH Zürich

Geo-, Structural- and Environmental Data ▪ Highlights
Fig. 1: Subglacial water pressure (black solid line) and basal icequakes (red squares) beneath Gornergletscher. In 2004 (left) a major
lake drainage maintained high subglacial water pressures for several days. In 2006 (right) the pressure perturbation was rather
minor, as a surface drainage produced only small discharge.
Fig. 2: The North Aegean Trough (NAT) is one of the most active
seismo-tectonic structures in Greece. According to GPS measurements
the differential velocity across the NAT diminishes towards
its western termination. In Figure 1a section of a Finite Elements
model developed for the North Aegean sea is shown. The colour
scheme corresponds to the calculated continuous dislocation field
of this region. The red line indicates the location of the NAT.
Fig. 3: : Residuals of motion as calculated with the Finite Elements
method are shown with respect to a recent GPS velocity solution
(red arrows). The red line indicates the location of the NAT.
D-BAUG Annual Report 2009 ▪ 67