000011945 001__ 11945
000011945 005__ 20141205160003.0
000011945 04107 $$aeng
000011945 046__ $$k2008-10-12
000011945 100__ $$aTsurugi, Masato
000011945 24500 $$aStudy on High-Cut Frequency Characteristics of Ground Motions for Inland Crustal Earthquakes in Japan

000011945 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011945 260__ $$b
000011945 506__ $$arestricted
000011945 520__ $$2eng$$aHigh-cut frequency characteristics of ground motions for inland crustal earthquakes occurring in Japan are examined. It is very important to make clear spectral decay characteristics in high frequency range for strong ground motion prediction. The target earthquakes are the 2003 Miyagi-ken Hokubu earthquake (Mw:6.1) and the 2005 Fukuoka-ken Seiho-oki earthquake (Mw:6.6). The Butterworth type high-cut filter with cut-off frequency, fmax and its power coefficient of high-frequency decay is assumed to express the high-cut frequency characteristics of ground motions in this study. The four parameters such as seismic moment, corner frequency, cut-off frequency, and its power coefficient are estimated by comparing observed spectra at hard rock sites with theoretical spectra. The theoretical spectra are calculated, based on the omega squared source characteristics convolved with propagation-path effects and fmax filter shapes. In result, the fmax of the mainshock of the 2003 Miyagi-ken Hokubu earthquake is estimated as 8.3Hz and that of the 2005 Fukuoka-ken Seiho-oki earthquake is 6.5Hz, respectively. The power coefficients of high-frequency decay, s, are estimated about 1.0. From these results, the high-cut filter with about 7.0Hz as fmax and 1.0 as the power coefficient of high-frequency decay is useful for strong ground motion prediction at hard rock site. The fmax’s of aftershocks of those earthquakes are estimated in the range about 9Hz and 20Hz. The seismic moment dependency of fmax is not clear, however the fmax’s of large events are smaller than those of small events.

000011945 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011945 653__ $$aStrong ground motion prediction, Spectral decay characteristics, Cut-off frequency (fmax), High-cut filter, Seismic moment dependency

000011945 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011945 720__ $$aTsurugi, Masato$$iKagawa, Takao$$iIrikura, Kojiro
000011945 8560_ $$ffischerc@itam.cas.cz
000011945 8564_ $$s2065457$$uhttp://invenio.itam.cas.cz/record/11945/files/02-0036.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 02-0036.
000011945 962__ $$r9324
000011945 980__ $$aPAPER