eprintid: 1366
rev_number: 15
eprint_status: archive
userid: 2
dir: disk0/00/00/13/66
datestamp: 2015-02-23 11:23:42
lastmod: 2017-02-08 12:21:33
status_changed: 2015-04-27 12:10:46
type: article
metadata_visibility: show
creators_name: Douglas, John
corp_creators: ARN/RIS, BRGM  3 avenue C. Guillemin, BP 36009  45060 Orléans Cedex 2, France
title: On the regional dependence of earthquake responce spectra
ispublished: pub
subjects: MP3_2
divisions: EPOS-P
full_text_status: none
keywords: Ground-Motion Estimation, Attenuation Relationships, Regional Dependence, Analysis 
of Variance, Stochastic Method
abstract: It  is  common  practice  to  use  ground-motion  models,  often  developed  by  regression  on  recorded 
accelerograms,  to  predict  the  expected  earthquake  response  spectra  at  sites  of  interest.  An  important 
consideration when selecting these models is the possible dependence of ground motions on geographical 
region,  i.e.,  are  median  ground  motions  in  the  (target)  region  of  interest  for  a  given  magnitude  and 
distance the same as those in the (host) region where a ground-motion model is from, and are the aleatoric 
variabilities  of  ground  motions  also  similar?  These  questions  can  be  particularly  difficult  to  tackle  in 
many  regions  of  the  world  where  little  observed  strong-motion  data  is  available  since  there  are  few 
records to validate the choice of model. Reasons for regionally dependent ground motions are discussed 
and possible regional dependence of earthquake response spectra is examined using published ground-
motion  models,  observed  accelerograms  and  also  by  using  ground  motions  predicted  by  published 
stochastic models. It is concluded that although some regions seem to show considerable differences in 
spectra it is currently more defensible to use well-constrained models, possibly based on data from other 
regions, rather than use predicted motions from local, often poorly-constrained, models.
date: 2007-03
date_type: published
publication: ISET Journal of Earthquake Technology
volume: 44
number: 1
publisher: Department of Civil Engineering, India
pagerange: 71-99
refereed: TRUE
issn: 0972-0405
access_IS-EPOS: limited
owner: Publisher
citation:   Douglas, John  (2007) On the regional dependence of earthquake responce spectra.  ISET Journal of Earthquake Technology, 44 (1).  pp. 71-99.