Download or read book Ground-motion Prediction for Subduction-zone Earthquakes written by Fleur Strasser and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Models to predict the ground motion for earthquakes that occur in subductionzones are of great importance for earthquake risk reduction and mitigation in manyparts of the world where there is a significant hazard from large earthquakes alongthe subduction interface and from earthquakes within the subducting slab. Mostexisting ground-motion predictive equations for subduction-zone events areprimarily based on strong-motion recordings from Japan, Cascadia, Mexico, Alaskaand New Zealand. In contrast, few records from South and Central America havebeen included in global predictive equations to date, although a major proportion ofthe seismicity of these regions is related to subduction-zone processes. Thedevelopment of a strong-motion database from subduction-type events in South andCentral America is therefore an important and essential step for ground-motionprediction in these regions as well as other subduction zones in the world. In this project two databases of strong-motion records from subduction-zoneevents along the Peruvian-Chilean and the Central American subduction zones havebeen developed. The Central American database compiled during this study consistsof 554 triaxial ground-motion recordings from both interface and intraslab-typeevents of magnitudes between 5.0?MW?7.7. The database compiled for SouthAmerica consists of 98 triaxial ground-motion recordings from 15 subduction-typeevents of magnitudes 6.3?MW?8.4, recorded at 55 different sites in Peru and Chile, between 1966 and 2007. These datasets have then been used to investigate the extentto which global and regional models for subduction regimes could be applied for theprediction of ground motions from the subduction events in these regions, followinga maximum-likelihood approach. Regional differences in the ground-motionamplitudes amongst the South and Central America subduction zones are examinedand preliminary adjustments to existing equations are made in order to resolve thedifferences between observed ground motions and predictions from these equations. This has led to suggestions for the prediction of ground motions from subductionzoneearthquakes in the South and Central American regions.