例如,近期日本地震最初深度测算为地下83km,
The latest measurements suggests its depth was actually 30km.
而最近的一次测算结果却显示,深度实为30km。
Normally, that would still put it in the class of safe earthquakes, but it was so powerful thatthe usual rules did not apply.
通常来说,30km仍可划入安全等级。但此次地震能量巨大,以往的经验概不管用。
The secret of the new method is that depth changes an earthquake s character in ways otherthan just its tsunami-generating propensity.
新系统的秘密在于地震深度对地震性质的改变不仅仅停留在是否引发海啸的问题上。
The rupture in the rock that causes a deep earthquake propagates rapidlyat about 3km asecond.
岩层断裂引发深震传播速度很快大约3km/秒。
A shallow rupture moves more slowly: 1?km a second is common.
而浅震传播速度较慢:一般约1.5km/秒。
The speed seems related to the rigidity of the rock that is rupturing, and deep rock, which isunder more pressure, is more rigid.
速度可能与断裂岩层的坚硬程度有关,深层岩体受压力更大,也更坚硬。
Shallow rocks bend, and that slows the rupture down.
【2015考研英语阅读地震学与海啸】相关文章:
最新
2016-10-18
2016-10-11
2016-10-11
2016-10-08
2016-09-30
2016-09-30