The liquefactions formed during the Southern Hyogo Prefecture Earthquake on 17th January, 1995, were found at a lot of locations along and near the Nojima Earthquake Fault in the nourthern Awaji island, Japan. The instantaneous-shaking liquefaction found at the Ogura location occurred in the consolidated-week consolidated Osaka formation which is composed of alternating beds of silt-clay-sand layers and gravel layers.The grain size distribution shows that the grain size of the boiled sands is in the range of grain size having a potential possibility to generate liquefaction known as so far. It is shown by the field evidence and seismic data that the instantaneousshaking liquefaction formed mainly by the ground motion generated by P-wave rather than S-wave.
