Why can earthquake warning outperform earthquake waves? Issuing a warning in advance?
Many media reported that before the earthquake, residents in many places in Sichuan and Chongqing received earthquake warnings through their mobile phones. The screenshot of the warning posted by one of the Chongqing netizens shows that "In 64 seconds, the horizontal wave of earthquake reached in Jiangbei District, Chongqing, and the epicenter was Luding, Sichuan. The warning of magnitude 36.9, with a strong sense of tremor." Earthquake warning is one of the world-recognized technical means that can effectively reduce earthquake disasters . Is earthquake warning an earthquake forecast? How did it outperform earthquake wave to warn people in advance?
Researcher of China Earthquake Emergency Search and Rescue Center Jia Qunlin: Earthquake forecasting is before the earthquake occurs, and the early warning is that the earthquake has occurred. After the earthquake, since the propagation speed of electromagnetic wave is faster than that of seismic waves, we can use electromagnetic waves to outperform seismic waves and say hello to the people downstream.
It turns out that some places received earthquake warnings because the first time after the earthquake occurred, the earthquake warning center spread the news at a faster speed than the earthquake, which gave everyone time to avoid disasters.
Have your mobile phone enabled the "earthquake warning" function?
earthquake warning is so important, many friends will ask, how can we receive it as soon as possible? Depending on the mobile phone model, some brands of mobile phones need to go to the app store to search for the keyword "earthquake warning" and download the relevant apps by yourself. There are also some brands of mobile phones that need to go to the system "Settings" to find the "Safety" option, and then follow the prompts step by step to turn on the "Earthquake Warning" function.
In addition, residents in some earthquake-prone areas in my country also have installed dedicated terminals for earthquake warning system. It is like a small TV screen. Once an earthquake hits, warning information such as earthquake wave arrival countdown will appear on the screen, reminding users to avoid danger as soon as possible.
animation demonstration how to escape correctly when encountering an earthquake?
solves the problem of receiving earthquake warnings. So what should we do when we receive the warnings so as to protect ourselves from or less harm to the greatest extent? The Ministry of Emergency Management released a popular science animation for shock absorption on September 5. Let’s take a look.
What should I do if I feel an earthquake happening in my sleep?
earthquakes are highly sudden and destructive, especially when they occur at night. Since people are sleeping soundly, they are slow to react and are more likely to cause major casualties. What should we do if we feel an earthquake in our sleep?
Associate Professor, Institute of Emerging Risks, Northern University of Technology Infantry: Once we encounter an earthquake and shake us from our sleep, we quickly grasped our two pillows with both hands, held our two ears, and rolled down quickly from one side of the bed. When we rolled to the ground, our faces rushed down, and our two elbows formed a triangle space to keep the height of our entire body lower than the height of the mattress of the bed.
If trapped in the ruins, how should you save yourself?
00 Accidental misfortune happens, we are trapped under the ruins of earthquakes, so how should we save ourselves? Experts told us that the most important thing at this time is to consolidate your living space, that is, to find bricks, stones, wooden sticks, etc. that can be used at hand to support the heavy objects in front of you to prevent them from being buried during aftershocks.
If you find any injury or bleeding in the body, you need to take off your clothes quickly, fold them simply, and hold the wound hard.
There is also a very dangerous situation. If our limbs are pressed, it is very likely that squeeze syndrome will occur. The squeezed limbs produce toxins. When aftershocks occur, or are rescued, the squeezed limbs move, and blood flows back into the squeezed limbs, which is at risk of death.To prevent this phenomenon from happening, we should tightly tie it with clothes or wire at the nearest part of the limbs where the limbs are pressed.
After treating the space and wounds, the next thing we have to do is to tap the objects around us with stones or metal objects, making it easier for rescuers to discover us. Remember, try not to shout, so that you can preserve your physical strength and body moisture.
Source: CCTV News
