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According to the news item, how far was the center of the Tuesday earthquake from the capital of Haiti?
According to the news item, how far was the center of the Tuesday earthquake from the capital of Haiti?
admin
2013-02-21
46
问题
According to the news item, how far was the center of the Tuesday earthquake from the capital of Haiti?
Earthquake hit Haiti hard, with extensive damage and many casualties.
Compared to the well-known seismic areas like the Pacific Rim, the Caribbean seems geologically quiet, but this area — where tectonic plates meet — has a long history of earthquakes, tsunamis, and volcanoes.
In 1946, the Dominican Republic, just across the border from Haiti, experienced a magnitude eight earthquake, which triggered a tsunami. Other major recorded earthquakes in the 17th, 18th, and 19th centuries may have been produced by movement of the same fault that caused Tuesday’s disaster.
Earthquakes generally occur when the tectonic plates that make up the Earth’s crust move suddenly. Eric Calais, a geophysicist, says that sudden movement can follow a buildup of stress as adjacent plates struggle to move past each other.
In this case, the damage was caused by movement of a "strike-slip fault."
In other cases, the plates may move up and down, rather than from side to side. Either way, the release of energy can cause tremendous damage. How much damage depends on several factors.
The center of the earthquake was a scant 10 kilometers beneath the surface, and just 15 kilometers from the capital.
Tuesday’s quake has been followed by a series of aftershocks, which Stuart Sipkin of the US Geological Survey says are pretty typical.
Many of the aftershocks have been measured at over magnitude 5—enough to cause additional damage, including toppling structures weakened by the original earthquake.
选项
A、Just 5 kilometers.
B、Just 10 kilometers.
C、Just 15 kilometers.
D、Just 25 kilometers.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/uOaO777K
0
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