@ ŒfÚŽGŽi˜ajF “ú–{’nkHŠwƒVƒ“ƒ|ƒWƒEƒ€u‰‰W VolF 4Šª ”NF 1975”N •ÅF 65-72•Å ’˜ŽÒi˜ajF - ƒ^ƒCƒgƒ‹i˜ajF - ´˜^i˜ajF
- ƒL[ƒ[ƒhi˜ajF - ŒfÚŽGŽi‰pjF PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒi‰pjF Yoshimasa KOBAYASHI ƒ^ƒCƒgƒ‹i‰pjF HAZARDS FROM EARTHQUAKE FAULTING IN JAPAN ´˜^i‰pjF
Dimensions, displacements and other aspects of surface faults in earthquakes in Japan since the 1891 Nobi earthquake are investigated, and various features of damage caused by faulting are summarized. The horizontal displacement is predominant in most earthquake faults in this country. In general, plural faults move in an earthquake, and a belt 0.4 to 3 km wide on both sides of a postulated fault as well as conjugate faults crossed by the latter are at risk. Some examples of damage as graben, mole track, tension cracks en echelon, or gentle flexure of land surface are presented. In an earthquake of M 7.0 to 7.5 a region within 5 to some ten kilometers from the fault line may suffer more than 30 % of destroyed houses. A possibility of relatively gentle movement of fault wall during earthquake is suggested. ƒL[ƒ[ƒhi‰pjF - ‹LŽ–‹æ•ªF - ‹æ•ª @@@ˆÏˆõ‰ï˜_•¶W