2, 2018 Liquefied soil caused numerous buildings to collapse in the Indonesian city of Palu after Friday’s magnitude 7. Here’s a brief explanation of liquefaction, how common it is, and where it is likely to happen. Liquefaction is a phenomenon where saturated sand and silt take on the characteristics of a liquid during the intense shaking of an earthquake, according to the United States Geological Survey website. Conditions that could lead to liquefaction can be found in many places in Indonesia and throughout Asia, said Mark Quigley, Associate Professor of Earthquake Science at the University of Melbourne. In the case of Palu it’s on a very nice, natural bay.
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