Investigation of Tectonic Elements in Western Anatolia Using EIGEN-6C4 gravity field model
19/09/2016 | 17:45 | Session 2: Global gravity field modelling
Author(s): Fikret Dogru, Oya Pamukcu, Hasan Yildiz, Tolga Gonenc and Mehmet Simav
Fikret Dogru, Oya Pamukcu, Hasan Yildiz, Tolga Gonenc and Mehmet Simav
The Aegean region is one of the most active regions in the World with the Gediz and Menderes grabens and faults in Western Anatolia of high seismic activity and of a complex tectonic structure. To investigate the quality of the gravity data and global gravity field models in the area, we compare the terrestrial gravity data collected through several projects by Dokuz Eylul University (DEU) in the western Anatolia both with EGM08 and EIGEN-6C4 (combination of GOCE, GRACE and LAGEOS data) models. We found that EIGEN-6C4 model gives better agreement with terrestrial gravity than EGM08 model, due to the GRACE and GOCE data contribution into EIGEN-6C4 model development. As the available terrestrial gravity data are scarce and have an inhomogeneous coverage, not enough in order to correctly and homogeneously represent the gravity ﬁeld in the Western Anotolia, EIGEN-6C4 model is used for investigating the tectonic elements. Bouguer gravity anomalies in the area between 37.9°-38.9°N and 26.5°-27.5°E are computed using the EIGEN-6C4 model. Coherency between the low bouguer gravity anomalies and known faults are detected.