## 1 Introduction  
Earthquake risk is defined as the probability of ground motion that can damage and cause loss of life in a certain place within a certain time period. Seismic hazard analysis is an essential stage for the estimation of earthquake risk. Earthquake parameters such as the peak ground acceleration (PGA), peak ground velocity (PGV), and spectral acceleration may be obtained by traditional probabilistic seismic hazard analyses. Mostly, these parameters are obtained using the annual probability of exceedance for a specific location of the event and design characteristics [1; 2; 3; 4; 5; 6]. Significant loss of life and property after an earthquake's occurrence clearly shows the importance of the seismic hazard estimation studies. Assessing and managing the necessary information about earthquakes are also important factors for spatial planning and urban renewal [7; 8; 9; 10; 11; 12]. The seismic design codes and earthquake hazard maps can be updated through the new data obtained. In this way, potential seismic hazard estimations can be made more realistically. The studies of reducing earthquake damage started after the Erzincan earthquake (Mw = 7.9), which was recorded as the biggest earthquake in Turkey; 33,000 people lost their lives. Turkey's first seismic zoning map was officially produced in 1945 [13; 14]. This map was updated in 1945, 1947, 1963, 1972, 1996, and 2019. Except for the latest map, the previous ones were produced based on regional risk. The last updated map was produced by taking into account earthquake hazards based on specific sites. The current map was prepared within the scope of a project titled \"Updating the Seismic Hazard Map of Turkey\", which was supported by the Disaster and Emergency Management Presidency of Turkey (DEMP) in the scope of the National Earthquake Research Program (UDAP). The latest updated map was prepared in a more detailed manner using the recent earthquake source parameters, earthquake catalogues, and also the newest mathematical models. Dissimilar to the previous ones, PGA values are starting to be used, and the approach of \"earthquake risk regions\" lost its significance [14; 15; 16; 17]. In the updated Turkish Earthquake Hazard Map, both the horizontal and vertical spectral parameters can be obtained for four earthquake ground motion levels, which are given in the following sections. In this map, seismic risk is defined probabilistically due to its uncertainties related to geographical location [18]. Technological developments and scientific innovations in civil and earthquake engineering have necessitated some changes in earthquake-resistant building design principles. So far, 10 different seismic design codes have come into force at different times in Turkey. The most detailed and up-to-date one was completed in 2018 and entered into use in 2019. In this study, the effects of different earthquake ground motion levels and site-specific design spectrums on structural analyses were examined on a regional basis. In the previous code, only the standard design earthquake motion with a repetition period of 475 years was in question. However, 4 different ground motion levels with 2475, 475, 72, and 43 repetition periods are taken into account with the current regulation. Another innovation taken into account in this study is the site-specific design spectra. In the previous code, four different design spectra were being used for a total of four different earthquake zones. A design spectrum specific to each geographical location is used with the current map and code. Seismic forces threating the structures are directly related to the ground motions. One of the most important terms for determining these forces are the design spectra. There is a need to update the earthquake hazard map, providing input data to the design spectra obtained from seismic zoning. Hence, seismic zoning studies for ground motions are important indicators in determining seismic risk.