NGA-West2 Model for Estimating Average Horizontal Values of Pseudo-Absolute Spectral Accelerations Generated by Crustal Earthquakes.

摘要

A model for estimating average horizontal values of pseudo-absolute spectral accelerations generated by crustal earthquakes is developed as part of this study. The NGA-West2 Project significantly expanded the data base of motions recorded during earthquakes and offered the opportunity to re-examine and update the NGA relationships published by the NGA developers in 2008. The new data set comprised 21,539 recordings obtained during earthquakes with magnitudes ranging from 3 to 7.9, recorded at distance ranging from 0.2 km to well over 300 km, and for recording stations with Vs30 ranging from 100 to 2000 m/sec. These data spanned the large magnitude range (M = 4.5 to 7.9) and the small magnitude range.