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The response spectrum is one of the important basic materials for the aseismic design. Numerous strong groundmotions based on the seismic source characteristics for the earthquakes occurring in the Korean Peninsula were simulatedto obtain the response spectra by using the computer program, SMSIM, developed by Boore (2005). Through theextensive review of other study outcomes, the input data for the simulation such as seismic source and attenuationcharacteristics were selected. The spectra obtained from the simulated ground motions were normalized to 1.0 g of zeroperiod aceleration and compared with the standard response spectrum proposed by the U.S. Atomic Energy Comission(AEC, 1973). In this study, we found that the spectral values for the response spectra appeared to be larger than those ofthe standard spectrum in the frequency band above roughly 10 Hz. The variation of resulting response spectra wasdrop denotes higher value in the low frequency range.......... response spectrum, simulated strong motion, Korean Peninsula, seismic source characteristics. . : ....... ..... ... ... ..... .... . ....... .. ... , ..... ..