Ground‐Motion Prediction Equations for the Average Horizontal Component of PGA, PGV, and 5%‐Damped PSA at Spectral Periods between 0.01 <i>s</i> and 10.0 <i>s</i>

Abstract

This paper contains ground‐motion prediction equations (GMPEs) for average horizontal‐component ground motions as a function of earthquake magnitude, distance from source to site, local average shear‐wave velocity, and fault type. Our equations are for peak ground acceleration (PGA), peak ground velocity (PGV), and 5%‐damped pseudo‐absolute‐acceleration spectra (PSA) at periods between 0.01 s and 10 s . They were derived by empirical regression of an extensive strong‐motion database compiled by the “PEER NGA” (Pacific Earthquake Engineering Research Center's Next Generation Attenuation) project. For periods less than 1 s , the analysis used 1,574 records from 58 mainshocks in the distance range from 0 km to 400 km (the number of available data decreased as period increased). The primary predictor variables are moment magnitude ( M ), closest horizontal distance to the surface projection of the fault plane ( R JB ), and the time‐averaged shear‐wave velocity from the surface to 30 m ( V S30 ). The equations are applicable for M =5–8, R JB &lt;200 km , and V S30 =180–1300 m/s.