###### Abstract
carried out a comprehensive study on strong-motion characteristics using a dataset of 77 strong ground motion records within a 200 km range of the epicenter of the M\({}_{\rm w}\)7.0 earthquake that occurred on the Samos Island in the Aegean Sea on 30 October 2020, which affected Turkiye and Greece [13]. On 6 February 2023, at 04:17 local time in Turkiye, an M\({}_{\rm w}\)7.7 magnitude earthquake occurred in the southern part of Kahramanmaras Province, with a surface wave magnitude (M\({}_{\rm s}\)) of 7.8 according to the China Earthquake Networks Center. The epicenter was located in Pazarcik, which is 34 km south of Gaziantep, at a latitude of 37.288 degrees north and a longitude of 37.043 degrees east. According to Turkiye's Disaster and Emergency Management Authority, the focal depth was 8.6 km, and nine hours later at 13:24 local time, a M\({}_{\rm w}\)7.6 earthquake took place in the central part of Kahramanmaras Province, with the epicenter in Eibistan. The Pazarcik earthquake occurred on the main branch fault of the East Anatolian Fault Zone (EAFZ), with a deformation zone exceeding 200 km. The successive occurrence of earthquakes caused an increase in the loss of both lives and property. More than 500,000 structures suffered structural damage at different levels, while more than 50,000 people died [14]. Both earthquakes significantly affected 11 different provinces, such as Hatay, Kahramanmaras, Adhyaman, Malaya, Adana, Osmaniye, Kilis, Sanlurfa, Gaziantep, Osmaniye, and Diyarbakir [14]. The strong seismic network in Turkiye obtained a large number of strong-motion records during the Pazarcik earthquake (2023, M\({}_{\rm w}\)7.7), and many strong-motion stations had detailed site information, providing valuable basic data for investigating the attenuation characteristics of PGA and EPA in Turkiye. PGA stands for Peak Ground Acceleration, which is the maximum absolute value of ground motion duration during an earthquake. PGA is predominantly controlled by the high-frequency components of seismic motion and can exhibit significant instability due to the influence of complex factors. EPA, short for Effective Peak Acceleration, denotes the peak ground acceleration associated with the mean value of the acceleration response spectrum Sa(T) within the high-frequency range (0.1 to 0.5 s) when considering a damping ratio of 5%. It is important to note that the seismic response of a structure is not solely reliant on individual peak ground acceleration values. As a result, it is meaningful to introduce EPA values that are relevant to the structural seismic response based on these response spectra. We selected appropriate attenuation models, adopted reasonable regression statistical methods, established prediction equations for PGA and EPA, and investigated the differences in attenuation characteristics for different site classifications. This paper presents seismic PGA and EPA prediction equations specifically developed for the East Anatolian Fault Zone in Turkriye, utilizing the most recent data from significant and powerful earthquakes. Furthermore, this paper pioneers a comparative analysis of attenuation characteristics between the Pazarcik Earthquake and the Wenchuan Earthquake. It quantifies soil site amplification factors in relation to bedrock, leading to noteworthy conclusions.