B.A. Wibowo¹ , N. Heryandoko¹ , I. Fatchurohman¹ , W. Weniza¹ , D. Daryono¹ , M. Riyadi¹

¹Indonesian Agency for Meteorology, Climatology and Geophysics (BMKG), National Seismological Center, Jakarta, Indonesia

Abstract:

Research has been done to compare frequency response, its dominant frequency and its correlation between North Korea's Nuclear Test Explosions. We used recent North Korea's Nuclear Test Explosions that were recorded at the CTBTO's seismic stations near the Korean Peninsula. We used seismic data in MiniSEED format of the events from each station and its dataless SEED format. Dataless SEED is used to remove the instrument responses to obtain the seismic waveform without instrument interferences. The seismic waveform data from each station were processed using Trend Frequency Analysis and Analysis of Spectral Ratio Method to see the frequency response and its dominant frequency. After acquiring its frequency responses, we made a correlation of the frequency response between nuclear explosions to determine the frequency similarities between those events. Determining the seismic frequency of nuclear explosions in Korean Peninsula will help seismologist to identify between nuclear and earthquake activities.