Frequency band-dependence of S-wave splitting in China mainland and its implications

Citation
K. Liu et al., Frequency band-dependence of S-wave splitting in China mainland and its implications, SCI CHINA D, 44(7), 2001, pp. 659-665
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
SCIENCE IN CHINA SERIES D-EARTH SCIENCES
ISSN journal
1006-9313 → ACNP
Volume
44
Issue
7
Year of publication
2001
Pages
659 - 665
Database
ISI
SICI code
1006-9313(200107)44:7<659:FBOSSI>2.0.ZU;2-Q
Abstract
Butterworth band-pass filter has been applied to S-wave data recorded at 8 stations in China mainland, and S-wave splitting at different frequency ban ds is analyzed. The results show that the delay time and the fast polarizat ion directions of S-wave splitting depend upon the frequency bands. There i s an absence of S-wave splitting at the station of Urumqi (WMQ) for the ban d of 0.1-0.2 Hz. With the frequency band broadening, the delay time of S-wa ve splitting decreases at the stations of Beijing (BJI), Enshi (ENH), Kunmi ng (KMI) and Mudanjiang (MDJ); the fast polarization direction changes from westward to eastward at Enshi (ENH), and from eastward to westward at Hail aer (HIA). The variations of delay time with bands at Lanzhou (LZH) and Qio ng-zhong (QIZ) are similar, and there is a coherent trend of fast polarizat ion directions at BJI, KMI and MDJ, respectively. Initial interpretations t o the results of frequency band-dependence of S-wave splitting are also pre sented.