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[report整理] SENEWS-2011-03-21

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[Homework]SENEWS-2011-03-21

This is the VOA Special English Technology Report.
A powerful earthquak struck northeasten coast of Japan at 2:46pm local time on March 11.Japanese media * agency release its first tsunami warnings just 3 minutes later,the country has one of the best earthquake early warning systems in the world.
There are more than 4000 sciense make it *intensity *meeters in case though out Japan to measure earthquake activity.This meeters provide information with in 2 minutes of an earthquake happening,information about the (string)and the center of the earthquake can be learned with in 3 minutes,there are also (c)sea walls around the much of the Japanese coast line.
But this measures proved no match for the powerful earthquake and tsunami.C* is a tsunami (expert)with the department of (s)and environmental enginnering at the University of S California in Los Angeles.
Japanese one of the most well-prepared country of earthquake *tsunami warnings.The heavy warning,but I think what was wrong is we have not preparted it even the size of the *.
He says there are 2 reasons for this.Japan has not had any event anywhen near as big as this one in the last one hundred fifty years.And scientists had not expected such a large earthquake happening of the coast of Japan.
The 9point zero magnitude earthquake was the forth most powerful earthquake ever recorded world wide.It was also the worst earthquake ever to hit Japan.The tsunami waves that followed were reported to have reached as high as 13 meaters in some areas.C says Japan's (c)sea walls when not build to handle such high waves.
The (c)sea walls in many places in Japan about S *about Sin in the (S)there were about three meters for it about (century).So that's all **at least that area they were not expecting as such size of waves.
A tsunami wave can travel as fast as 800 killometers per hour to get to higher ground people would often have to travel for many killometers.This can take more time than a fast travelling tsunami will permit.
This is especially true in cases like Japan where the center of the earthquake struck so close to the coast line.The tsunami waves followed almost the media play.Experts say early warning system will continue to be limited by *facts.Until earthquakes and tsunamis can be predicted it.
And that's the VOA Special English Technology Report written by J.You can find more news about the disater in Japan at our webside voaspecialenglish.com.You can also find transcripts mp3s and (broadcasts)of our reports.And you can find us on Facebook and Youtobe at VOA Learing English.I'm Steve Ember.


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