Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, Ia, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin Island

In the present study, empirical attenuation relations for multiple ground motion intensity measures (PGA, PGV, Ia, FIV3, CII, and MFAS) were developed Sakhalin Island (in far east of Russia). A recorded strong dataset was used, making GMPEs applicable in active crustal regions with an earthquake magnitude range 4–6 a distance up to 150 km. The hypocentral used as basic metric. For first time research, analytical representation Arias (Ia) obtained framework multi-asperity source model. Asperities are considered sub-sources high-frequency incoherent radiation. physical model our study based on stress drop asperities ratio total rupture area combined asperities. average examined earthquakes approximately 13.4 MPa, asperity 0.22, which is generally close similar estimates earthquakes. coefficients statistical scattering models also analyzed. Moreover, scale modified proposed study. new has explicit meaning characterized by its simplicity measurement. It associated acceleration spectrum level can be successfully early warning systems.