🏷️ About: Earthquake early warning refers to the use of the characteristic that the propagation speed of seismic waves is lower than that of radio waves after an earthquake occurs to warn in advance where the seismic waves have not yet arrived. Generally speaking, the propagation speed of seismic waves is a few kilometers per second, while the speed of radio waves is 300,000 kilometers per second.
Therefore, if we can use the earthquake information obtained by the real-time monitoring network and the rapid assessment results of the possible scope and degree of damage of the earthquake, we can use the short time before the arrival of destructive seismic waves to issue an early warning.
Earthquake early warning refers to the use of the characteristic that the propagation speed of seismic waves is lower than that of radio waves after an earthquake occurs to warn in advance where the seismic waves have not yet arrived.
Generally speaking, the propagation speed of seismic waves is a few kilometers per second, while the speed of radio waves is 300,000 kilometers per second.
Studies have shown that if the warning time is 3 seconds, the casualty rate can be reduced by 14%; if the warning time is 10 seconds and 60 seconds, the casualties can be reduced by 39% and 95% respectively.
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