Assessment of potential seismic hazard and site effect in Antakya (Hatay Province), SE Turkey

Abstract

Antakya city is at risk because of strong earthquakes occurring in the area, and different soil conditions that can produce variation of the ground motion amplification. Microzonation of cities provides a basis for site-specific hazard analysis in urban settlements. In particular, seismic microzonation can be provided by means of detailed seismic assessment of the area, including earthquake recordings and geological studies. In this paper, we propose a preliminary microzonation map for the city of Antakya, based on the variation of the dominant periods and shear velocities of the sediments covering the area. The periods are retrieved from microtremor measurements conducted at 69 sites, using the horizontal-to-vertical spectral ratio technique. The results of microtremor analysis were compared with data obtained from refraction microtremor (ReMi) measurements at four profiles crossing the studied area. According to the classification of dominant periods, Antakya city can be divided into five zones, probably prone to different levels of seismic hazard. The shorter natural periods are in inner Antakya and both the sides of Asi River (i.e., northern and southern parts). The eastern and western parts of Antakya have maximum dominant periods. The V s 30 values were calculated by using the ReMi method along the profiles. Antakya city has V s 30 values in the range of category C of the national earthquake hazard reduction programme site classification.

Time-dependent model for earthquake occurrence and effects of design spectra on structural performance: a case study from the North Anatolian Fault Zone, Turkey

“…It is essential to realize local soil conditions and seismicity characteristics of the region and make them usable in building design and evaluation. The obtained earthquake parameter values directly affect the calculations related to the structural analysis (Borcherdt, 2004;Över et al, 2011;Büyüksaraç et al, 2013;Karaşin and Işık, 2017;Işık et al, 2016aIşık et al, , 2016bIşık and Kutanis, 2015;Kutanis et al, 2018, Bekler et al, 2019.…”

Seismic Risk Assessment and Mitigation in the Antakya–Maras Region (SERAMAR): Empirical Studies on the Basis of EMS-98

“…It is therefore classified into the highest seismic zone of the current Turkish Seismic Code (TMPS 1998). Figure 2a indicates the main historic events and fault lines according to Över et al (2011) and Pawlewicz et al (2002), as well as the current seismicity indicated by earthquakes that occurred in the vicinity from 2006 until 2009. The historical earthquakes shown with epicenters in the close surroundings (approximately a 7 km distance) have caused heavy damage corresponding to intensities IX or X (Tan et al 2008).…”

Multi-risk interpretation of natural hazards for settlements of the Hatay province in the east Mediterranean region, Turkey using SRTM DEM

“…Several scientists particularly studied on the tectonics of the study region (Yurur and Chorowicz 1998;Rojay et al 2001;Adiyaman and Chorowicz 2002;Yurtmen et al 2002;Over et al 2004;Tatar et al 2004;Westaway 2004;Akyuz et al 2006;Korkmaz 2009Korkmaz , 2010Over et al 2011). Yurur and Chorowicz 1998;Rojay et al 2001;Adiyaman and Chorowicz 2002;Yurtmen et al 2002;Over et al 2004;Tatar et al 2004;Westaway 2004;Akyuz et al 2006;Over et al 2011 informed that there is a significant fault zone, the Karasu Fault Zone (KFZ), which bounds the western margin of the KVZ in the Hatay province, takes up a part of the left-lateral slip between the African and The SRTM acquires elevation data on a near-global scale to generate the most complete medium-resolution digital topographic database of the earth.…”

“…Yurur and Chorowicz 1998;Rojay et al 2001;Adiyaman and Chorowicz 2002;Yurtmen et al 2002;Over et al 2004;Tatar et al 2004;Westaway 2004;Akyuz et al 2006;Over et al 2011 informed that there is a significant fault zone, the Karasu Fault Zone (KFZ), which bounds the western margin of the KVZ in the Hatay province, takes up a part of the left-lateral slip between the African and The SRTM acquires elevation data on a near-global scale to generate the most complete medium-resolution digital topographic database of the earth. The SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavor (The Global Land Cover Facility, http://glcfapp.umiacs.umd.edu:8080/esdi/ index.jsp).…”