Ground motion prediction equations for higher order parameters

Amplitude, duration and frequency content are the three key characteristics of a ground motion time history. Few ground motion parameters quantifies two and rarely three of these features. There are even fewer ground motion prediction equations (GMPEs) available for these ground motion parameters. In this study, new GMPEs are derived for a total of 21 parameters representing peak amplitude, energy, intensity, frequency, duration and evolutionary characteristics of a ground motion acceleration time history. An extensive dataset of Japan, comprising 96880 ground motions with magnitudes ranging from M w 5.0 to M w 9.0 is used to calibrate the model. The model includes the effects of magnitude saturation, tectonic source mechanism, focal mechanism, geometric and anelastic attenuation, volcanic arc and site effects. Median results of estimates are compared against recorded data of the twin Kumamoto earthquakes of M w 7.3 and 6.5. These results are also compared against previously developed GMPEs of the region. Further, towards the verification of the functional form, behavior of inter and intra event residuals is verified against magnitude (M w ), distance and shear wave velocity (V s30 ) respectively.