1. 震波：由於地球内有一种推动岩层的应力,当应力大於岩层所能承受的强度时,岩层会发生错动,而这种错动会在一瞬间突然释放巨大能量,并以弹性波(elastic waves)的形式向四周传播,此弹性波即为地震波(seismic waves).
2. 地震波：由于地球内有一种推动岩层的应力,当应力大于岩层所能承受的强度时,岩层会发生错动 (dislocation),而这种错动会突然释放巨大的能量,并产生一种弹性波 (elastic waves) ,我们称之为地震波 ( seismic waves) ,当它到达地表时,引起大地的震荡,
1. It monitors geological information by recording seismic waves created by explosions and other artificial sources.
2. In a tsunami, waves typically radiate out in directions opposite from the seismic disturbance.
3. They did it by estimating temperatures under the North American plate based on previous experiments that bounced seismic waves deep underground.
4. The Meteorological Agency said there was no threat of tsunami, potentially dangerous waves triggered by seismic activity.
5. The agency said there was no danger of tsunami, the potentially killer waves triggered by seismic activity.
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6. The Meteorological Agency said there was no threat of a tsunami, or potentially dangerous waves triggered by seismic activity.
7. There was no danger of tsunami, tidal waves stirred up by seismic activity.