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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 earthquake struck the northeastern coast of Japan at 2:46pm local time on March 11th.Japan's Media ???? Agency released its first tsunami warnings just three minutes later.The country has one of the best earthquake early warning systems in the world.There are more than 4,000 seismic intensity  meters in place throught out Japan to measure earthquake activity.These meters provide information within two minutes of an earthquake happening.Information about the strength and the center of the earthquake can be learnt within 3 minutes.There were also concrete (sea walls) around much of the Japanese coast line but these measures proved no match for the powerful earthquake and tsunami.K S L is a tsunami expert with the Department of Civil and environmental engineering at the University of the Southern California in LA.
Japan is one of the most well-prepared countries on earth (intens)in tsunami warnings.The hard warning, i think what was strong, they had not ??? the time of the tsunami.
He says there are two reasons for this.Japan has not had any event anywhere as big as this one in the past 150 years.And scientists had not expected such a large earthquake happening off the coast of Japan.The 9.0 magnitude earthquake was the fourth most powerful earthquake ever recorded world wide.It was the worst earthquake ever to hit Japan.The tsunami waves that followed were reported to have reached as high as 13 meters in some areas.K S L says Japan's concrete sea walls were not built to handle to such waves.The concrete sea walls in many place in the Japan are about 10 meters that's about 33 feets.In the Sendaii there were about 3 meters that's about 10 feets. So that's why in the Sendaii area they were not excepeting such a size of a wave.
A tsunami wave can travel as fast as 800 kms per hour.To get to a higher ground people would often have to travel many kilometers.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 immediately.Experts say early warning systems will continue to be limited by be its fast until earthquakes and stunamis can be predicted.And that's the VOA SPECIAL ENGLISH TECHNOLOGY REPORT,written by June S.You can find more news about the disaster in Japan at our website voaspecialenglish.com. You can aslo find transcripts mp3 and  ???? of our report and you can find us on the facebook and u2 at voalearningenglish. I am Steve Ember.

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