Liquefaction is a phenomenon in which loosely and water saturated sediments such as sand layer become liquefied by strong ground motion due to earthquake. Liquefaction gives rise to the loss of the earth's capacity to support and differential land subsidence or landslide occurs, which causes the damage to basic infrastructure and buildings. Active Fault Research Center makes effort not only to reveal the mechanism of liquefaction by collecting the liquefied sediments and observing them in detail, but to utilize the common feature in them as index of the past great earthquakes. We introduce our study in the area along the Columbia river in Washington State of USA which was carried out as cooperative work with USGS in fall of 2000, and reconnaissance study of liquefaction associated with the 2000.10.6 Tottoriken-seibu earthquake.
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Sand blows on Oshamanbe, Hokkaido, after the 1993 Earthquake off the Southwest Coast of Hokkaido. The maximum diameter of the sand blows is about 2m |
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AIST Today Vol. 1, No. 2 (2001) 4-8
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No.2 2001
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