Fig. 4

Observed Fourier spectra for the May 24, 2013 Sea of Okhotsk earthquake; The Fourier spectra were calculated for the S wave part for the K-NET and KiK-net records at the ground surface. For the stations that recorded both P and S waves, the record was divided into the P and S wave parts using a cosine taper and the latter was used. The square root of the squared sum of two horizontal components is shown. A Parzen window with a band width of 0.05 Hz was applied. In each panel, the spectrum at ABSH05 is plotted for reference