Evaluation of liquefaction potentials based on shear wave velocities in Pohang City, South Korea

Abstract This study evaluates the potentials of liquefaction caused by 2017 moment magnitude 5.4 earthquake in Pohang City, South Korea. We obtain shear wave velocity profiles measured suspension PS logging tests at five sites near epicenter. also perform downhole three sites. Among sites, surface manifestations (i.e., sand boils) were observed and not other two The maximum accelerations on ground are estimated using Next Generation Attenuation relationships for Western United State motion prediction equations. from slightly different, resulting varying cyclic resistance ratios, factors safety against liquefaction, potential indices. Nevertheless, we found that both test approaches can be used to evaluate potentials. indices liquefied approximately 1.5–13.9, whereas those non-liquefied 0–0.3.