China aims at more prompt issuance of tsunami warning

15:36, April 22, 2011      

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China's tsunami warning system is able to issue tsunami warnings within two minutes after an inshore tsunami takes place and can issue warnings within 15 minutes after a tsunami occurs in the open sea, said Yu Fujiang, deputy director of the National Marine Environmental Forecasting Center of China (NMEFC).

China is able to issue tsunami warnings within 15 minutes after a tsunami takes place in the open sea.

Yu said that a special department in the State Oceanic Administration (SOA) is responsible for tsunami warnings, and there are currently 10 staff members on 24-hour duty to monitor the tsunami situation and timely issue warnings. The SOA has also independently developed a numerical prediction model on tsunami predictions to analyze and forecast tsunamis through a computer that can perform 26 trillion calculations per second. Judging from the time and wave height of the recent tsunami in Japan, the calculation of the forecast is accurate.

"The system can issue tsunami warnings within two minutes if an offshore earthquake takes place and can issue tsunami warnings within 15 minutes if an earthquake occurs in the open sea," Yu said.

He also said that the 15-minute warning time is sufficient because the tsunami caused by earthquakes in the open sea such as the Manila Trench will take three hours to hit the coast of China. According to sources, it takes four hours for the tsunami caused by the Japan earthquakes to hit the eastern coast of Taiwan and seven to eight hours to hit the coast of the mainland.

In addition, China is also establishing a more advanced tsunami warning system in the South China Sea region that can sound a warning within only one minute after a tsunami takes place in a certain area.

China's coastal regions subject to the impact of tsunamis are divided into four grades

Yu said that in the aftermath of the tsunami in Japan, China has studied and evaluated the areas that tsunamis will reach and flood and is now drawing the "tsunami evacuation graph."

China's coastal regions are divided into four grades according to the downward trend in the impact of tsunamis. The northern coastal areas of Taiwan Province are most vulnerable to tsunamis. The areas ranging from the southern coastal areas of Jiangsu Province to the northern coastal areas of Fujian Province, the mouth of the Pearl River and the western coastal areas of Taiwan Province are much liable to be affected by tsunamis. The southern coastal areas of Shandong Province, the western coastal areas of Fujian Province, the coastal areas of Guangdong Province and the Beibu Gulf area are the third-grade areas, and the neighboring areas of the Bohai Bay and the western areas of Hainan Island are the fourth-grade areas.

By People's Daily Online

 
 
     
 
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