Fig. 6
Comparison among synthetic seismograms (particle velocity components) by three methods: quasi-Cartesian (red line), spherical (black line) and Cartesian (green line) FDTDs. Right upper and lower panels show the waveforms in the radial and vertical components, respectively. The amplitude of each trace has been multiplied by the epicentral distance. The number beside each trace indicates the receiver number corresponding to the location shown in the left panel