earthquake warning system diagram.
● 50 km from the epicenter of the region, the first 10 seconds before the earthquake early warning information
● 90-100 from the source km area, more than 20 seconds before the earthquake early warning information received
50 km away from the source area, can receive 10 seconds before the earthquake early warning information. Disaster Mitigation Institute yesterday Chengdu Hi-tech Technology Co., Ltd. and Chengdu Meihuan service in Haiti and the United States I. Trade Company signed a strategic cooperation agreement. I. Trade Company will purchase US-magic technology batches earthquake early warning system, and gradually building in Haiti, which marks China’s earthquake warning technology will be the first to go abroad.
how the earthquake early warning? Receive messages through mobile phones
“early warning system works is the time difference with the seismic waves, earthquake monitoring stations to gather data for 3-5 seconds before the analysis, it is about 20 kilometers warning blind, but 50 km away from the source areas will receive 10 seconds before the earthquake early warning information; 90-100 km of the region, more than 20 seconds in advance receive early warning information. “king of Chengdu Hi-Tech Institute for Disaster Reduction Dr. Tun said.
According to Mr. I. Trade Company CEOHantz, the system will be in Haiti around 4000 square km area within the installation and testing, takes about six months to complete, while the full range of installation in Haiti , then takes about two years. Wang Tun told reporters, when there will be earthquakes in Haiti early warning systems for clients in the market for sale, Haitians can buy earthquake early warning system for mobile phones, computer client, or the direct purchase of earthquake early warning siren on the wall .
why the election “Chengdu technology”? More suitable conditions in Haiti
“I studied most of the world’s earthquake warning system, and found the best of China’s early warning system in Haiti.” I. Trade’s chairman told reporters that Mr. hantz say, I. Trade Company since 2010 in Haiti some schools, office buildings and home use of Chengdu R & D seismic alarm system, and has been tested in Haiti earthquake aftershocks. When the current earthquake early warning system is fully developed after the success of, I. Trade’s decision in Haiti laid the earthquake early warning system. It is understood that this is the first Chinese earthquake early warning technology to go abroad.
“Japan’s early warning system for earthquake early warning through the Internet, information dissemination, and the system only through radio waves, mobile phones and other terminals can be spread more suitable conditions in Haiti.” Hantz said: “The future is also The earthquake early warning system will apply to more earthquake-prone countries. “
use of earthquake aftershock warning has been successfully developed more than 60 times
earthquake prediction worldwide still a major problem, but can not forecast does not mean not warning. The difference is: Earthquake prediction is not yet occurred, but seismic events may occur prior to issue notices; and “Earthquake Warning” is the sudden earthquake had occurred ahead of the serious warnings before disaster has not yet formed and to take to the action, also known as “when the earthquake early warning.”
earthquake early warning is the key to the use of seismic data in a few seconds before an accurate estimate of the magnitude, epicenter of the earthquake early warning and rapid estimation of the impact of the target.
since the Wenchuan earthquake, Chengdu Hi-Tech Institute for Disaster Reduction using aftershocks of this earthquake can not copy the resources dedicated to earthquake early warning research. After three years of hard work in mastering the core technology of earthquake early warning, while absorbing the domestic and foreign, especially Japanese technology, and its self-developed hardware and software into an integrated system, the formation of the earthquake early warning systems complete independent intellectual property rights. The system laid about 20,000 square kilometers in the Wenchuan area of ??aftershocks have been laid in the region of 60 aftershocks occurred in a successful early warning.
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earthquake early warning such as “race”
seismic waves into longitudinal waves and shear waves. Longitudinal wave velocity is 9100 m/s, less destructive; S-wave velocity 3700 m/s, more destructive. Earthquake early warning is laid relatively dense (station 10 pitch – 15 km) of seismic observation network, the earthquake occurs, seismic waves and radio waves or the speed of computer networks communication is poor, the destructive seismic waves (seismic wave) before the arrival of warning to alert the target.
earthquake early warning and more like a seismic wave of “race” in the seismic waves have not yet arrived, ready to remind people to do the protection. But for the vast majority of earthquakes, earthquake early warning can provide an effective warning time less than 30 seconds.
Japan’s first earthquake early warning system to establish the number of deaths can be reduced 80%
earthquake frequency of Japan is the first real-time earthquake warning system to establish the country. Back in the 1980s, Japan Railway Technical Research Institute has established the world’s first practical earthquake early warning system. The world’s first truly national earthquake warning system, also established by the Japanese, and in August 1, 2004 began trial operation. University of Tokyo Earthquake Research Institute Meguro, Professor Lang has been the public imagination by simulating a major earthquake in the East China Sea, to assess the role of earthquake early warning systems, research findings show that the earthquake early warning in case of 100% popularity, the number of deaths can be reduced by 80%.
2008 年 6 14, Japan’s northeastern Iwate Prefecture and Miyagi Prefecture and other places in the magnitude 7.2 earthquake, the Japan Meteorological Agency in the earthquake, in some regions achieved by the television Media release of earthquake early warning. The earthquake caused only 7 people were killed and 200 injured, the casualty rate is so low largely due to earthquake in the Japan Meteorological Agency issued a timely warning.
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