M.Sc Tezi Görüntüleme

Student:	Salih LİVAOĞLU
Supervisor:	Asst. Prof. Dr. Özcan ÇAKIR
Department:	Geophysical Engineering
Institution:	Graduate School of Natural and Applied Sciences
University:	Karadeniz Technical University, Turkey

Title of the Thesis:	SEISMIC SOURCE DETERMINATION AND FOCAL MECHANISM OF EARTHQUAKES FROM AN ANALYSIS OF SINGLE-STATION THREE COMPONENTSURFACE WAVE RECORDINGS
Level:	M.Sc
Acceptance Date:	1/1/2000
Number of Pages:	81
Registration Number:	i086

Summary:

The possibility of using single station three-component surface- wave records for inversion of seismic moment tensor of an earthquake has been investigated in details. The application of the method is tested using Southern Greece, Northern Iran, Southeast Taiwan and Arabian Sea earthquakes. It is also tested on synthetic seismograms. Applications on the data and synthetic seismograms show that the method is quite accurate.

When applying the single–station method, it is necessary to have an a priori knowledge of the focal depth. Separate inversions of the real and imaginary parts of a system of equations give us a reasonable estimate of the focal depth .

One of the purposes of the current method is to determine the focal mechanism solution in an emergency procedure, just after an occurrence of an earthquake. Such a procedure may be implemented to get both the seismic moment and rough estimate of the fault plane solution within a few hours. Another interest of the method would be to determine the focal mechanism parameters of the past earthquakes.

Key words: Moment tensor, Surface wave, Fault plane, Synthetic seismogram, Inversion, Focal mechanism, Seismic moment