The Database System For Surface Wave Tomography In Eurasia And The West Pacific

The database system for surface wave tomography in Eurasia and the West Pacific is a internet application for managing geophysical by database and visualization technology. Sponsored by NSFC and special plan of the Ministry of Land and Resources, we study the database system for surface wave.In this thesis, we select more than ten thousand seismic records in the range of 40°W~180°E, 40°S~80°N from 1982 to 2005 in the 113 digital seismic stations of Eurasia and the West Pacific. These seismic records include five parts: initial records, CMT, mixed dispersion inversion, group velocity inversion, S wave velocity inversion. Because data type is complex and data form is various, we design a mighty and friendly interface for users and achieve the storage and operation for large data, taking SQL Server 2000 as the background database and taking good use of the interface technology of Delphi. Besides, from the point of database managing, we design for data security , data recovering and backup for the steady running of the system.The signification for this system is to improve the efficiency of geophysical data analysis and processing. This database system is helpful for probing into the deep earth, the form and evolvement of lithosphere/ asthenosphere , the form and evolvement and the relation of surface structure and deep structure of Eurasia.