日本における活断層調査研究の現状と展望

抄録

After the 1995 Hyogoken-Nanbu (Kobe M7.3) earthquake, intensive studies for the active faults in Japan have been carried out especially to the 98 fault zones having potentials of the M7 class or greater earthquakes. And then long-term predictions for these zones have been evaluated on the future large earthquakes. The author briefly reviewed about such items as the active fault maps in urban area on the scale of 1: 25,000 organized by the Geographical Survey Institute, strip maps of the major active faults published from the Geological Survey of Japan, trench excavation surveys, drillings, seismic reflection surveys, segmentation and grouping problems for the long traced active faults, comprehensive atlases and books, long-term evaluation for the major faults (zones), and seismological assessment for the nuclear power plant. Present-day perspectives for the active fault studies in Japan were widely described in this article.