A prediction model for vertical-to-horizontal spectral ratios of ground motions on the seafloor for moderate magnitude events for the Sagami Bay region in Japan

A prediction model for offshore vertical-to-horizontal ( V / H ) spectral ratios of peak ground acceleration (PGA) and 5%-damped elastic response spectra for periods ranging from 0.01 to 10 s for an offshore area off Sagami Bay was developed. To compare differences between offshore and onshore ground motions in the V / H spectral ratios, an onshore V / H prediction model was derived for onshore stations adjacent to the studied offshore sites....