The International Centre for Theoretical Physics (Trieste) in collaboration with Institute of Geodesy and Geophysics of the University of Trieste, now department of Earth Sciences of the University of Trieste has been organizing workshops on studies of seismic wave propagation and earthquake source studies in a realistic three-dimensional Earth and on methods for inversion of seismic data since 1992. Indeed analysis of seismic records help us improve our understanding of both earthquake rupture mechanisms and the deep structure of the Earth, its evolution and dynamics. Hence efforts have been devoted at: - improving our understanding of seismic wave generation by natural and artificial sources and their propagation through complicated Earth structures. For the last few years, because of the development of fast, large memory computer systems, tremendous progress has been made for modelling seismic wave generation and propagation. Some of the methods are purely numerical, others are hybrid combinations of analytical and numerical methods.
They are used now for solving inverse problems of seismology like reconstructing three-dimensional Earth structures, or modelling seismic sources. These methods have completely changed our approach to event detection, location identification and wave propagation in heterogeneous, anisotropic, and non-linear, media.
The workshop will cover practically all aspects of the above-mentioned problems, i.e. theory of wave propagation, simulation techniques and methods of inversion of seismic wave fields. Special emphasis will be placed on the following application: - Global, regional and local studies of the Earth structure for diverse scientific and applied purposes; - Detailed investigations of earthquake-prone areas, including major faulting zones and studies of the nature of seismic sources; - Monitoring of seismicity and stress fields in active seismic and volcanic zones; - Simulation of strong motion for estimating.