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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 strike the north-eastern coast of japan at 2:46p.m local time at march.11.japan's  media ? agency?its first ?warnings just 3 mins later.the country has one of the best earthquake early warning systems in the world.there are more than 4000 science?? meters in place throughout japan to measure earthquake activity.these meters provide information within 2 mins of an earthquake happening.information about the strength and the center of the earthquake can be learned within 3 mins.there were also concrete sea walls around much of the japanese caostline.but these measures prove no ?for the powerful earthquake and ?.k is a?expert with a department of civil and environmental engineering at the university of southern california in los angels.japan is one of the most well-prepared countries on earthquake ????? i think what went wrong is they can not participate ?the?of the?he says there are 2 reasons for this.japan has not had any event anywhere near as big as this in the last 150 years.and scientists had not expect such a large earthquake happening of the coast of in japan.the 9.0?earthquake was  the 5th most powerful earthquake ever recorded worldwide.it was also the worst earthquake ever to hit japan.the? waves that followed were reported to a rich as high as 30 meters in some areas.c says japan's concrete sea walls were no built to handle such high waves.the concrete sea walls in many palces in japan are about 3 meters for about 33 feet in the ?there are about 3 meters use a?????a ?wave can travel as fast as 700km/h.to get a higher ground  people would often have to travel for many kms.this can take more time than a fast travelling ? will ?.this is especially true in cases like japan where the center of the earthquake strike close to the coastle.the ?waves follows almost immediately.expert says early warning systems will continue to be limited until earthquakes and ? can be predicted.and that's the voa special english technology report.written by j.you can find more news about the disaster in japan at our website voaspecialenglish.com.you can also find? MP3s and?about our reports.and you can find us facebook and youtube at voalearningenglish.i'm s.

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