Abstract
Broadband strong ground motion time histories at a site above the fault plane for the 1923 Great Kanto Earthquake and future earthquakes on the Sagami trough are generated, using a hybrid method that computes the ground motions separately in the short period and long period ranges and then combines them into a single time history. Considering uncertainty in the source parameters of future large earthquakes, 960 strong motion time histories are generated. The ground motions at the site are characterized by a smooth median response spectrum and its standard error estimate, together with a subset often time histories whose average response spectrum, and whose variability approximately matches the standard error of the smoothed response spectrum.
