As the intensity index of ground motion, PGA (peakgroundacceleration) is often employed and analyzed.
作为地震动强度指标,峰值加速度一直是研究最多的物理量。
2
Peakgroundacceleration, or shaking, caused by Friday's earthquake was nearly double—at its epicenter—than what the Fukushima Daiichi plant, 110 miles (172 km) away, was built to withstand.