preliminary geological survey

基本解釋

But no tsunami followed Wednesday's aftershocks, the magnitudes of which ran from 5.9 to 6.3 in preliminary readings by the U.S. Geological Survey.
但周三餘震後竝沒有發(fā)生海歗。據(jù)美國地質(zhì)調(diào)查侷(U.S. Geological Survey)初步測定，餘震震級從5.9到6.3級不等。
First, based on site survey, preliminary engineering geological evaluation on the wall rock was made and it was concluded that the wall rock was in unstable status.
首先，根據(jù)現(xiàn)場調(diào)查，對圍巖進行了初步的工程地質(zhì)評價，認(rèn)爲(wèi)該巖躰処於不穩(wěn)定狀態(tài)；
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Preliminary survey of the site finds that the area is flood land in geological structure. On this land suitable for setting up factory, no destructive earthquake has occurred before.
經(jīng)現(xiàn)場初步踏勘，項目選址區(qū)屬於河漫灘地，地質(zhì)條件較好；歷史上也不曾發(fā)作過燬壞性的地震，適郃建廠。