caa a22 4500 463172337 CHVBK 20180406164817.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10950-006-9043-x doi (NATIONALLICENCE)springer-10.1007/s10950-006-9043-x Approximate recovery of coseismic deformation from Taiwan strong-motion records [Elektronische Daten] [Yih-Min Wu, Chien-Fu Wu] Since 1990, digital strong-motion accelerographs and global positioning system (GPS) instruments have been widely deployed in the Taiwan region (Shin et al. 2003; Yu et al. 2001). The 1999 Chi-Chi, Mw 7.6 earthquake and the 2003 Chengkung, Mw 6.8 earthquake were well recorded by both digital accelerographs and GPS instruments. These data offer a good opportunity to determine coseismic displacements from strong-motion records and to compare the results with those derived from GPS measurements. As noted by Boore (2001), a double integration of the acceleration data often leads to unreasonable results, and baseline corrections are therefore required in most cases before the integration. Based on the works of Iwan et al. (1985) and Boore (2001), we developed an improved method for baseline correction and validated it using an extensive set of data from shake-table tests of a known "step” displacement on 249 accelerographs. Our baseline correction method recovered about 97% of the actual displacement from the shake-table data. We then applied this baseline correction method to compute coseismic displacements from the strong-motion data of the Chi-Chi and Chengkung earthquakes. Our results agree favorably with the coseismic displacements determined by the GPS measurements at nearby sites. The ratio of seismic to geodetic displacement varies from 0.78 to 1.41, with an average of about 1.05. Springer Science+Business Media, Inc., 2007 strong-motion record nationallicence GPS nationallicence coseismic deformation nationallicence baseline correction nationallicence Wu Yih-Min Department of Geosciences, National Taiwan University, No. 1, Sec. 4th, Roosevelt Rd., Taipei, Taiwan, Republic of China aut Wu Chien-Fu Central Weather Bureau, Taipei, Taiwan, Republic of China aut Journal of Seismology Kluwer Academic Publishers 11/2(2007-04-01), 159-170 1383-4649 11:2<159 2007 11 10950 https://doi.org/10.1007/s10950-006-9043-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10950-006-9043-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wu Yih-Min Department of Geosciences, National Taiwan University, No. 1, Sec. 4th, Roosevelt Rd., Taipei, Taiwan, Republic of China aut NATIONALLICENCE 700 1- Wu Chien-Fu Central Weather Bureau, Taipei, Taiwan, Republic of China aut NATIONALLICENCE 773 0- Journal of Seismology Kluwer Academic Publishers 11/2(2007-04-01), 159-170 1383-4649 11:2<159 2007 11 10950 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer