Armutlu
Evolution of seismicity at the western end of the 1999 Izmit rupture
A joint R&D project in collaboration with Kocaeli University and the Kandilli earthquake observatory Istanbul
PI: J. Zschau,
Participants: Kocaeli Universität : M.F. Özer, S. Baris, S. Irmak
Kandilli Earthquake Observatorium: M.K. Tuncer, C. Celik
GFZ: H. Grosser, H. Woith, B.G. Lühr, H.U. Wetzel, R. Wang, M. Motagh, T. Walter, S. Parolai project duration: 2005-
Ten major earthquakes with magnitudes above Ms > 6.5 migrated along the North-Anatolian fault zone (NAFZ) between 1939 and 1999. The western end of the 1999 Izmit earthquake rupture is located south of Istanbul next to the northern shoreline of the Armutlu Peninsula depicted by distinct clusters of micro-seismic activity. Thus, the local seismic network ARNET (Fig. 1) had been set-up by the end of 2005 in co-operation with Kocaeli University to monitor the chronological evolution of seismicity (Fig. 2). Additionally, possible interactions between seismic waves and pore-pressure variations in geothermal systems are studied at deep wells. These activities contribute to the implementation of an Anatolian plate boundary observatory (PBO) belonging to a series of GFZ-operated Earth System Observatories to systemically study coupled Earth processes.
Fig. 1: Stations of ARNET. Red triangles mark REFTEK systems with L4-3D seismometers (short period) and black stations mark GURALP systems (broadband). Stations with smaller signs are no longer in operation. Onshore tectonics taken from remote sensing images (H.-U. Wetzel, 2006) and offshore from Armijo et al. (2002) and Yaltirak & Alpar (2002).
