The observatory will acquire a broadband seismograph to strengthen hong kong s capability to predict tsunami . data received by the seismograph will be used to determine the details of the movement of the earth s plates during an earthquake 为了加强预测海啸的能力,香港天文台将购买一部宽频地震仪,收到的数据可以用来计算地震时地壳错动的仔细情况。