The Crustal Structure of the North–South Earthquake Belt in China Revealed from Deep Seismic Soundings and Gravity Data

Structure‐to‐structure seismic damage correlation model

“…The ground motion spectral acceleration $${S_a}$$ at each local site is calculated using the GK15 GMPE proposed by Graizer and Kalkan, 52 with predictor variables within the range of $${M}_{w}$$ = 5–8, closest distance to the surface projection of the fault plane $${R}_{\textit{jb}}$$ < 250 km, and average shear‐wave velocity at the top 30 m of $${V_{{\mathrm{s30}}}}$$ = 200–1300 m/s. Figure 13A shows the 5%‐damped spectral acceleration obtained by the GK15 GMPE with a magnitude of $${M}_{w}$$ = 6.2, an average shear‐wave velocity at the top 30 m of $${V_{{\mathrm{s30}}}}$$ = 200 m/s, 53 an epicentral distance of around 100 km and a regional quality factor of 130 54 . As can be seen, the average peak ground motion acceleration is 0.02 g, and $${S_a}$$ reaches a peak value of 0.06 g at a period of 0.20 s. Figure 13B plots the spatial distribution of $${S_a}$$ for each building under the earthquake scenario, in which the mean and standard deviation are 0.04 g and 0.02, respectively.…”