Empirical Estimation Method on Seismic Ground Motion and Amplification Factor

    1.Empirical attenuation formula for estimating PGA, PGV and response spectra
    2.Empirical attenuation formula for estimating seismic intensity
    3.Empirical formula for estimating the envelope of waveform
    4.Simple method to estimate the amplification by surface soil

Download: Excel File for attenuation relations
Fortran Source Code and parameter files for calculation of Rupture Distance & J-B distance.
Formulation for the Rupture Distance
Explanation about the reference point of source fault