Yosio is a geophysicist with special interests in terrestrial and extraterrestrial seismology. He was among the pioneering researchers who, during and following the Apollo Lunar Landing project in the 1970s, used the extensive data collected by a network of seismic stations on the Moon to make the first direct seismic observations of an extra-terrestrial object. This research in lunar seismology has led to an invaluable understanding of the dynamics and internal structure of the Moon. It also provides valuable information about tectonism not available on Earth due to the particularities of our planet’s size, composition, and stage of evolution. More recently, he is finding new information about the interior of the Moon using new analysis techniques, and with more advanced computers now available, applied to the decades-old data set. He is also assisting younger scientists and engineers in planning of future lunar missions.

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