Abstract:
This article presents a correlation model for pseudo-acceleration, peak ground
acceleration, and peak ground velocity residuals using a database of Mexican
subduction interface earthquakes at rock sites (NEHRP Class B). A mixed-effect
regression model, a ground motion model, and 40 event recordings (418 records)
with moment magnitude between five and eight were used to develop a
magnitude-independent correlation model. This region-specific model yields
consistently higher correlation values compared with similar studies developed
for shallow crustal regions and other subduction zones worldwide, particularly
for pseudo-acceleration values at distant periods. These results support the idea of
using a region-specific and mechanism-specific correlation model for Mexico’s
subduction zone.
