Accession Number : ADA256681


Title :   The Receiver Structure Beneath the Chinese Digital Seismograph Network (CDSN) Stations: Preliminary Results


Descriptive Note : Scientific rept. no. 1


Corporate Author : WESTON OBSERVATORY MA


Personal Author(s) : Mangino, S ; Ebel, J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256681.pdf


Report Date : 30 Apr 1992


Pagination or Media Count : 107


Abstract : This report provides preliminary results of an investigation of the crust and upper-mantle seismic velocity structure beneath the China Digital Seismograph Network (CDSN). Receiver functions obtained from over 100 teleseismic events were stacked by common back-azimuth and epicentral distance and inverted for the velocity structure beneath 5 CDSN stations. ne inversion results show that stations HIA and BJI have well constrained crustal models of about 40-km thickness with gradational Mohos. At WMQ there is evidence for shallow dipping structure and the inversion results indicate a smooth positive gradient in the crust with a transitional crust-mantle boundary. Model estimates for KMI and LZH are poorly constrained by the data analyzed thus far. Synthetic seismograms of 5 CDSN crustal models for the Soviet JVE nuclear test indicate that the receiver structure most strongly affects the radial component of the recorded P wave.


Descriptors :   *RECEIVERS , *SEISMOLOGY , *CHINA , *SEISMOGRAPHS , TEST AND EVALUATION , FUNCTIONS , STATIONS , THICKNESS , MODELS , GRADIENTS , INVERSION , SEISMIC VELOCITY , NETWORKS , STRUCTURES , PHASE , ESTIMATES , BOUNDARIES


Subject Categories : Seismology
      Command, Control and Communications Systems


Distribution Statement : APPROVED FOR PUBLIC RELEASE