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[report整理] SENEWS-2011-03-21

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[Homework]SENEWS-2011-03-21

homework
This is the VOA Special English Technology Report.
A powerful earthquakes struke the North-Eastern coast of Japan at two fourty-six pm local time on Mach eleven. Japan's meteorological agency released it's first tsunami warning just 3 minuts later. The country has one of the best earthquake early warning systems in the world. There are more than 4000 seismic intensity meters in place throughout Japan to measure earthquake activity. These meters provide information within 2 minuts of an earthquake happening. Information about the thrength and the center of the earthquake can be learned 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. Casters sylernalics is a tsunami experts with the Department of civil and environmental engineering at the university of southern Califonia in Los Angelas.
Japan is one of most well-prepared countries on earth in terms of tsunami warning. They had the warning, I think what was wrong, they had no anticipated  the size of this event.
He says there are two reasons for this, Japan has not had anyevent anywhen near as big as this one in the last 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 the powerful earthquake ever recorded worldwide. It was also the worst earthquake ever to hit Japan. Tsunami waves that followed were reported to have reached as high as 13 meters in some areas. C.S. says Japan's concrete sea walls were not built to handle such high waves.
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A tsunami wave can travel as fast as 800 Kilomters per hour. To get to higher ground, People were often have to travel for many kilometers. This can take more time than the fast traveling tsunami will permit. This is especially true in cases like Japan where the center of earthquake struck so close to the coastline. Tsunami waves followes almost immediately. Experts say early warning system will continue to be limited by these facts until the earthquakes and tsunamis can be predicted.
and that's the voa special english .....

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