Abstract
This work presents the results of geoacoustic inversions carried out using data from the Asian Seas International Acoustics Experiment East China Sea. Broadband data from small explosive sources were used for the inversions. Compressional wave speeds in the sediment and basement layers were estimated using a nonlinear, long-range, tomographic inversion technique based on group speed dispersion. This tomographic technique is a hybrid approach that combines a genetic algorithm for global parameter search with a Levenberg-Marquardt method for fine-scale parameter tuning. The results were compared with data from gravity and piston cores and a geophysical survey conducted at the experimental location using a watergun and towed hydrophone array.
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