Geoacoustics Laboratory

The Geoacoustics Laboratory of the University of Miami (UM-GAL) was established by Professor Tokuo Yamamoto in 1980. The main interest of UM-GAL is the physics of the wave-earth interactions of all kinds. UM-GAL has received 15 grants and contracts amounting to over five million dollars from the Office of Naval Research, the National Science Foundation, Oil Companies and the Japanese Science and Technology Agencies.

UM-GAL has been engaged in many field experimental projects. Among the past and present UM-GAL research projects are the wave-seabed interactions, the seabed and crustal inversion using gravity waves, the propagation and scattering of acoustic waves through marine sediments, the 3-D seismic system "Kite", the porosity, permeability and shear strength (P*2S) cross-well tomography system, the long term observation of the gravity waves and microseisms.

Six U.S. patents have been awarded for the new geophysical methods and instrumentation including the bottom shear modulus profiler, the autonomous instrument burial system, the buried ocean wave directional spectrometer and the P*2S tomography system.

Five Ph.D. degrees and eleven M.S. degrees have been produced from UM-GAL research projects. The UM-GAL graduates are currently working as the scientific officers of the U.S. Navy (3), the Japanese Ministry of Transport (4), the faculty of the U.S. Universities (3), a Canadian University, and researchers of corporation (3). Five are pursuing their Ph.D.'s here and elsewhere. UM-GAL also hosts visiting scientists and post doctoral scientists.

In 1989, a branch laboratory of UM-GAL was established in Nakajima, Ishikawa-prefecture, Japan. Initiation of the UM-GAL ,Japan was funded by the Science and Technology Agency of the Japanese Government, the City of Nakajima, and the Ishikawa Prefecture Government. Professor Yamamoto is the founding director and Drs. Dean Goodman and Mohsen Badiey started as resident associate directors. The UM-GAL Japan is specialized in the ground penetration radar applied to archeological investigations. The research support for the UM-GAL Japan has been steady with its main income from various municipal governments all over Japan.

The subground image of Tokyo Bay Bottom obtained by the P*2S Tomography method of UM-GAL is compared with the stratigraphy obtained by boring in the figure.

Contact Information

Prof. Tokuo Yamamoto
RSMAS - University of Miami
4600 Rickenbacker Causeway
Miami, FL 33149

tel: 305/361-4637
fax: 305/361-4781
Last revised: 15 November 1996