Feasibility Analysis of Short-Period Seismograph Receiver Function——An Example of Hotan Seismic Array, Xinjiang
详细信息
- 责任者：Tang Mingshuai (Earthquake Administration of Xinjiang Uygur Autonomous Region ; Urumqi 830011 ; China) ; Ge Can
- 刊名：Chinese Journal of Geophysics
- 出版年：2013
- 卷期：56(8)
- 关键词：短周期地震仪 ; short-period seismographs ; 接收函数 ; receiver functions
- 页码：p.2670-2680
- 图表：5 illus., 6 tables, 37 refs.
- 分类号：0500
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
Using the teleseismic waveform data recorded by 9 sub-stations(including 1 set of broadband and 9 sets of short-period seismographs) of Hotan Seismic Array with an aperture about 3 km in 3 years,we studied and analysed the stability and reliability of short-period seismograph receiver function.By comparative analysis of the receiver function waveforms isolated from teleseismic waveform data recorded by short-period and broadband seismographs,the following results are obtained.(1) Receiver functions of short-period and broadband seismographs are very consistent and highly stable,they have good linear correlation(correlation coefficient 0.9),but Ps seismic phases have small amplitude difference(about 20%),whenever the Gaussian coefficient value is 1.5 or 2.5.(2) The short-period seismograph receiver functions can replace broadband seismograph receiver functions,if a method using the seismic phase arrival time of receiver functions is adopted(such as grid-stacking-search method).(3) The result may cause wrong interpretation(e.g.,the lower crust low-velocity layer) if only the waveform data of short-period seismograph receiver functions are used to invert for crustal S-wave velocity structure,because there exist large velocity deviations(about 0.3 km/s) from lower crust to upper mantle,due to lack of low frequency information under 0.155 Hz and the nonlinear amplitude response under 1 Hz of the short-period seismographs;so additional data sensitive to wave velocity value(such as surface wave dispersion) are needed for joint analysis.