Abstract
Normal mode solutions for a spherical earth model are superposed to obtain realistic synthetic surface waves for various force systems. The calculation of excitation functions is greatly facilitated by the variational technique. The effects of attenuation and instrument response are included in the synthesis. The synthesized seismograms are compared with the actual seismograms for wave form, amplitude, radiation pattern, and phase to obtain various source parameters such as force geometry, source-time function, seismic moment, source dimension, and rupture velocity. The application is made to the Kurile Island earthquake of October 13, 1963 (M = 8.3). The comparison is made for Love waves G4 and Rayleigh waves R4 for a period range 100 to 400 sec. It is found that a reverse dip-slip fault with a dip angle of 22° and a dip direction of N47°W can explain the observation reasonably well. Other parameters determined are as follows: seismic moment, 7.5×1028 dyne-cm; source-time function, step function; fault length, 200 to 300 km; rupture velocity, 2.7 to 4.5 km/sec in the direction N43°E.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
