Coseismic Deformation Time History Calculated from Acceleration Records Using an EMD-Derived Baseline Correction Scheme: A New Approach Validated for the 2011 Tohoku Earthquake

Abstract

Research Article| May 01, 2013 Coseismic Deformation Time History Calculated from Acceleration Records Using an EMD‐Derived Baseline Correction Scheme: A New Approach Validated for the 2011 Tohoku Earthquake Jyun‐Yan Huang; Jyun‐Yan Huang Department of Earth Sciences, National Central University, Taoyuan 32001, Taiwan (R.O.C.)[e-mail]@earth.ncu.edu.tw Search for other works by this author on: GSW Google Scholar Kuo‐Liang Wen; Kuo‐Liang Wen Department of Earth Sciences, National Central University, Taoyuan 32001, Taiwan (R.O.C.)[e-mail]@earth.ncu.edu.tw *Also at National Center for Research on Earthquake Engineering, Taipei 10668, Taiwan (R.O.C.). Search for other works by this author on: GSW Google Scholar Xiao‐Jun Li; Xiao‐Jun Li Institute of Geophysics, China Earthquake Administration, Beijing 100081, [e-mail][e-mail] Search for other works by this author on: GSW Google Scholar Jun‐Ju Xie; Jun‐Ju Xie Institute of Geophysics, China Earthquake Administration, Beijing 100081, [e-mail][e-mail] Search for other works by this author on: GSW Google Scholar Chun‐Te Chen; Chun‐Te Chen Department of Earth Science, National Central University, Taoyuan 32001, Taiwan (R.O.C.)[e-mail][e-mail] Search for other works by this author on: GSW Google Scholar Sheng‐Chung Su Sheng‐Chung Su Department of Earth Science, National Central University, Taoyuan 32001, Taiwan (R.O.C.)[e-mail][e-mail] †Also at Central Weather Bureau, Taipei 10048, Taiwan (R.O.C.). Search for other works by this author on: GSW Google Scholar Bulletin of the Seismological Society of America (2013) 103 (2B): 1321–1335. https://doi.org/10.1785/0120120278 Article history first online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jyun‐Yan Huang, Kuo‐Liang Wen, Xiao‐Jun Li, Jun‐Ju Xie, Chun‐Te Chen, Sheng‐Chung Su; Coseismic Deformation Time History Calculated from Acceleration Records Using an EMD‐Derived Baseline Correction Scheme: A New Approach Validated for the 2011 Tohoku Earthquake. Bulletin of the Seismological Society of America 2013;; 103 (2B): 1321–1335. doi: https://doi.org/10.1785/0120120278 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Displacement time histories from double‐integrated accelerograms typically cannot be used to recover near‐field terms because of noise in the acceleration traces. To minimize this problem, empirical mode decomposition (EMD) is used to derive a baseline correction scheme. The scheme is tested against several models composed of a single frequency or two frequencies and offsets in acceleration. It is verified against real displacement time history using Global Positioning Systems (GPS) measurement. For single‐ and double‐frequency‐content models, obvious discontinuities are found at drift times for lower intrinsic mode function (IMF) components. A drift model, however, can be clearly found from summing higher IMFs and the residuals of simple frequency‐content waveform models. On the other hand, results show that the lesser frequency‐content signal has the greater decomposed result. Therefore, a suitable corner frequency for low‐pass filtering is first implemented to reduce frequency content. In this case, the trend in the given drift model is easily found by summing higher IMFs for a complex frequency content model (model 3 of this study). A suitable corner frequency for low‐pass filtering is attained using a grid‐search method. A new semiautomatic EMD‐derived baseline correction scheme is tested. The corrected coseismic deformation value (CDV, denoted hereafter as from preevent displacement to the final offset during strong motion), peak ground displacement, and displacement time history from this method have good agreement with 1‐Hz continuous GPS measurement for the 2011 Tohoku earthquake. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.