Experts say the shifts were likely caused by soil liquefaction.
专家说,这些变化可能是由土壤液化引起的。
英语百科
Soil liquefaction 土壤液化
Soil liquefaction describes a phenomenon whereby a saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress, usually earthquake shaking or other sudden change in stress condition, causing it to behave like a liquid.