As rock interface are crossed, the elastic characteristics encountered (by seismic waves)generally change abruptly, which causes part of the energy to be reflected back to the surface, where it is recorded by seismic instruments.
當(dāng)巖石界面被穿過的時(shí)候,震波所遇到的彈性性質(zhì)通常會(huì)發(fā)生突然的變化,這就使得一部分能量被反射回地面,在地面反射回來的波被震波紀(jì)錄儀記錄下來。