Akademik Veri Yönetim Sistemi
Seismological Society of America (SSA) Annual Meeting 2023, San Juan, Porto Riko, 17 - 21 Nisan 2023, ss.1
On February 6th, 2023, earthquakes with magnitudes of 7.7 and 7.6 on the Richter scale
occurred in Pazarcik/Kahramanmaras and Elbistan/Kahramanmaras/Turkey, respectively, with
depths of 9 km and 7 km and at UTC times of 01:17 and 11:24. These earthquakes caused
significant loss of life and property in Eastern Turkey and Northern Syria. The district of Golbasi
in the province of Adiyaman was one of the areas highly affected by the earthquakes due to
both the bearing capacity loss of the soil and the location of the Pazarcik Segment of the
Eastern Anatolian Fault Zone passing through the district center. Two days after the
earthquake, the earthquake research and application center team from Dokuz Eylul University
conducted preliminary field observations in the region. Structural damage in Golbasi was
observed to be the result of soil-bearing capacity losses and possible liquefaction. It is known
that the ground in Golbasi is composed of ancient lake sediments. It is considered that site
soils in the region has caused significant soil amplification if they are highly plastic whereas
large deformations and dependent attenuation took place in low plastic clays with silt.
Therefore, it is essential to determine shear-wave velocity distribution as part of this study,
microtremor measurements were taken at a total of 32 points with a 300 m sampling interval
in the Golbasi district to establish an initial database that could be easily extended by further
measurements to be made in intermediate locations. As a result of the microtremor
measurements, the predominant vibration period of the region, the Kg damage index
parameter, and the shear wave velocity models in 1, 2, and 3 dimensions via a forward and
inverse solution of the HVSR curves were calculated, and presented.