Geological and geophysical information system for eurasia. Final technical report, 30 July 1991-31 August 1993
Technical Report
·
OSTI ID:5220251
Topography and heterogeneous crustal structure have major effects on the propagation of regional seismic phases. We are collecting topographical, geological, and geophysical datasets for Eurasia into an information system that can be accessed via Internet connections. Now available are digital topography, satellite imagery, and data on sedimentary basins and crustal structure thicknesses. New datasets for Eurasia include maps of depth to Moho beneath Europe and Scandinavia. We have created regularly spaced grids of the crustal thickness values from these maps that can be used to create profiles of crustal structure. These profiles can be compared by an analyst or an automatic program with the crustal seismic phases received along the propagation path to better understand and predict the path effects on phase amplitudes, a key to estimating magnitudes and yields, and for understanding variations in travel-time delays for phases such as Pn, important for improving regional event locations. The gridded data could also be used to model propagation of crustal phases in three dimensions. Digital elevation models, Satellite imagery, Geographic information systems, Lg Propagation, Moho, Geology, Crustal structure, Topographic relief.
- Research Organization:
- Cornell Univ., Ithaca, NY (United States). Inst. for the Study of the Continents
- OSTI ID:
- 5220251
- Report Number(s):
- AD-A-274818/4/XAB; CNN: F29601-91-K-DB08
- Country of Publication:
- United States
- Language:
- English
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