抄録
For the purpose of investigating tsunami characteristics in Tokyo bay, a number of seismic fault models with the magnitude M=7.0 that could possibly occur underneath the Tokyo bay area are assumed and tsunami generations due to them are studied numerically. It becomes clear that the maximum tsunami height along the bay coast is nearly equal to the total vertical displacement of sea floor, i. e. the sum of maximum uplift and subsidence of sea bottom caused by faulting. A mode analysis of water oscillation in Tokyo bay is carried out. The second mode (N=2, T=71min) of bay water oscillation often predominates as tsunami waves. In Tokyo Harbour, current velocity of tsunami reaches about 2m/s at the harbour entrance for a model, for which the maximum tsunami height is equal to about 1m.
