Investigation of soil characterization in Hatay Province in Turkey by using Seismic Refraction, Multichannel Analysis of Surface Waves and Microtremor /Caracterizacion del suelo en la provincia de Hatay, Turquia, a traves de los metodos Refraccion sismica, Analisis Multicanal de Ondas Superficiales y Microtemblores

In this study, shallow seismic surveys, including seismic refraction, Multichannel Analysis of Surface Waves (MASW), Refraction Microtremor (ReMi), and Microtremor measurements were conducted to estimate site characterization at 26 strong-motion stations of AFAD (Disaster and Emergency Management Presidency) in the province of Hatay, situated in one of the most seismically active regions in southern Turkey. The Horizontal to vertical spectral ratio (HVSR) technique was applied, using smoothed Fourier spectra derived from a long duration series to determine dominant frequency values at different amplification levels. Shear wave velocity up to 30 m of the ground was detected with MASW analysis. In the ReMi analysis, up to 80 m was reached with a corresponding average of 650 m/s shear wave velocity. The shear wave velocities estimated by the MASW method up to 30 m were compared with those found by the ReMi method, and they were observed to be very compatible. The province of Hatay was classified according to Vs30 based NEHRP Provisions, Eurocode-8, the Turkish Building Earthquake Regulation (TBDY-2018), and Rodriguez-Marek et al. (2001). The shear-wave velocity (Vs30), Horizontal to Vertical ratio's (H/V) peak amplitude, dominant period, and site class of each site were determined. The H/V peak amplitudes range between 1.9 and 7.6 while the predominant periods vary from 0.23 sec to 2.94sec in the study area. These results are investigated in order to explain the consistency of site classification schemes. Keywords: Soil investigation; MASW; ReMi; HVSR technique; Site Classification. En este trabajo se realizaron sondeos sísmicos superficiales como la refracción sísmica, el Análisis Multicanal de Ondas Superficiales (MASW, del inglés Multichannel Analysis of Surface Waves), la refracción de microtemblores (ReMi, del inglés Refraction Microtremor), y la medición de microtemblores para una caracterización en 26 estaciones de registros sísmicos de la AFAD (Autoridad para la Administración de Desastres y Emergencias) en la provincia de Hatay, que está situada en una de las regiones sísmicamente más activas del sur de Turquía. Se aplicó la técnica de Relación Espectral Horizontal a Vertical con un espectro Fourier regular derivado de una serie de larga duración para determinar los valores de frecuencia dominante a diferentes niveles de amplificación. La velocidad de la onda de corte por encima de los 30 metros de profundidad se detectó a través de la técnica MASW.