新西兰地震雷达图制作完成
文章来源:未知 文章作者:enread 发布时间:2011-03-08 06:23 字体: [ ]  进入论坛
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The upheaval1 wrought2 by the 22 February earthquake in Christchurch, NZ, is illustrated3 in new radar4 imagery.

2月22日新西兰城市克赖斯特彻奇大地震的雷达图像已经制作完成。

The coloured bands, or fringes, represent movement towards or away from the spacecraft
The coloured bands, or fringes, represent movement towards or away from the spacecraft
The Magnitude 6.3 tremor5(震颤) killed more than 160 people and shattered a city already reeling from a previous seismic6 event(地震) in September.

Data from the Japanese Alos spacecraft has been used to map the way the ground deformed7 during the most recent quake.

It shows clearly that the focus of the tremor was right under the city's south-eastern suburbs.

The type of image displayed on this page is known as a synthetic8 aperture9 radar(合成孔径雷达) interferogram(干涉图) .

It is made by combining a sequence of radar images acquired by an orbiting satellite "before" and "after" a quake.

The technique allows very precise measurements to be made of any ground motion that takes place between the image acquisitions(兼并,获得) .

The coloured bands, or fringes(条纹,边缘) , represent movement towards or away from the spacecraft.

In this interferogram, the peak ground motion is almost 50cm of motion towards the satellite.

"It's like a contour map(等高线图) but it's showing to the south-east of Christchurch that the ground motion is towards Alos. That's uplift," explained Dr John Elliott from the Centre for the Observation and Modelling of Earthquakes and Tectonics (Comet) at Oxford10 University, UK.

"And then right under Christchurch, we see subsidence(下沉) . That's partly due to liquefaction(液化,熔解) but it's mainly due to the way the Earth deforms11 when you snap it like an elastic12 band."

Where the rainbow fringes become most tightly spaced is where the fault break came closest to the surface, although the data indicates the fault is unlikely to have broken right through to the surface.



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1 upheaval Tp6y1     
n.胀起,(地壳)的隆起;剧变,动乱
参考例句:
  • It was faced with the greatest social upheaval since World War Ⅱ.它面临第二次世界大战以来最大的社会动乱。
  • The country has been thrown into an upheaval.这个国家已经陷入动乱之中。
2 wrought EoZyr     
v.引起;以…原料制作;运转;adj.制造的
参考例句:
  • Events in Paris wrought a change in British opinion towards France and Germany.巴黎发生的事件改变了英国对法国和德国的看法。
  • It's a walking stick with a gold head wrought in the form of a flower.那是一个金质花形包头的拐杖。
3 illustrated 2a891807ad5907f0499171bb879a36aa     
adj. 有插图的,列举的 动词illustrate的过去式和过去分词
参考例句:
  • His lecture was illustrated with slides taken during the expedition. 他在讲演中使用了探险时拍摄到的幻灯片。
  • The manufacturing Methods: Will be illustrated in the next chapter. 制作方法将在下一章说明。
4 radar kTUxx     
n.雷达,无线电探测器
参考例句:
  • They are following the flight of an aircraft by radar.他们正在用雷达追踪一架飞机的飞行。
  • Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。
5 tremor Tghy5     
n.震动,颤动,战栗,兴奋,地震
参考例句:
  • There was a slight tremor in his voice.他的声音有点颤抖。
  • A slight earth tremor was felt in California.加利福尼亚发生了轻微的地震。
6 seismic SskyM     
a.地震的,地震强度的
参考例句:
  • Earthquakes produce two types of seismic waves.地震产生两种地震波。
  • The latest seismic activity was also felt in northern Kenya.肯尼亚北部也感觉到了最近的地震活动。
7 deformed iutzwV     
adj.畸形的;变形的;丑的,破相了的
参考例句:
  • He was born with a deformed right leg.他出生时右腿畸形。
  • His body was deformed by leprosy.他的身体因为麻风病变形了。
8 synthetic zHtzY     
adj.合成的,人工的;综合的;n.人工制品
参考例句:
  • We felt the salesman's synthetic friendliness.我们感觉到那位销售员的虚情假意。
  • It's a synthetic diamond.这是人造钻石。
9 aperture IwFzW     
n.孔,隙,窄的缺口
参考例句:
  • The only light came through a narrow aperture.仅有的光亮来自一个小孔。
  • We saw light through a small aperture in the wall.我们透过墙上的小孔看到了亮光。
10 Oxford Wmmz0a     
n.牛津(英国城市)
参考例句:
  • At present he has become a Professor of Chemistry at Oxford.他现在已是牛津大学的化学教授了。
  • This is where the road to Oxford joins the road to London.这是去牛津的路与去伦敦的路的汇合处。
11 deforms b5a4b66c680718e36b2f4eeb31547b36     
使变形,使残废,丑化( deform的第三人称单数 )
参考例句:
  • Bad rheumatoid arthritis deforms limbs. 严重的类风湿性关节炎会造成四肢变形。
  • The specimen deforms under a tensile stress applied parallel to the fibres. 试样在平行于纤维的张应力作用下发生变形。
12 elastic Tjbzq     
n.橡皮圈,松紧带;adj.有弹性的;灵活的
参考例句:
  • Rubber is an elastic material.橡胶是一种弹性材料。
  • These regulations are elastic.这些规定是有弹性的。
TAG标签: People earthquake map
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