HR: 1330h
AN: G43B-06    [Abstracts]
TI: Monitoring Crustal Deformation on the Silent Strand of the Western North Anatolian Fault Zone
AU: * Ozener, H
EM: ozener@boun.edu.tr
AF: Bogazici University, Kandilli Observatory and ERI. Geodesy Department Cengelkoy, Istanbul, 34680 Turkey
AU: Dogru, A G
EM: garagon@boun.edu.tr
AF: Bogazici University, Kandilli Observatory and ERI. Geodesy Department Cengelkoy, Istanbul, 34680 Turkey
AU: Gurkan, O
EM: gurkano@boun.edu.tr
AF: Bogazici University, Kandilli Observatory and ERI. Geodesy Department Cengelkoy, Istanbul, 34680 Turkey
AB: The Western Part of the North Anatolian Fault Zone (NAFZ) has been selected as a working area by many scientists due to the higher seismic activity on it. After the two big catastrophic earthquakes in 1999: the August 17 earthquake in Izmit, and the November 12 earthquake in Duzce, Turkey, many investigations have been pursued in the area. NAFZ branches from 30.6§ E westward into three active fault zones. The northern strand is called Izmit-Sapanca fault zone, the middle strand is called Iznik-Mekece fault zone, and the southern strand is called Mudurnu fault segment. The middle branch, which is known seismically low active than the other fault zones, extends westward via the southern coast of Lake Iznik to the Marmara Sea; it consists of simple strand almost over its length. According to historical documents, the 29 AD event is the only large earthquake known in the Iznik area. Presence of seismic gaps in Iznik-Mekece fault zone implies potential sites for future large earthquakes. In 1990, a geodetic network installed on the Iznik-Mekece fault zone by Geodesy Department of Kandilli Observatory and Earthquake Research Institute. First GPS measurements carried out in the year of 1994. The aim of these geodetic studies is to detect the crustal deformations using space techniques in this area. Nine-point GPS network has been measured annually. This study presents the analysis of these measurements and the evaluation of recent crustal movements in the area.
DE: 1200 GEODESY AND GRAVITY
DE: 1208 Crustal movements--intraplate (8110)
DE: 1242 Seismic deformations (7205)
DE: 1243 Space geodetic surveys
SC: Geodesy [G]
MN: 2005 Joint Assembly