地震预警如何发布？预测、预报、预警有何不同？一文读懂

Core Points - The theme of this year's National Disaster Prevention and Mitigation Day is "Everyone Talks About Safety, Everyone Knows Emergency - Identifying Hidden Disaster Hazards Around Us" [1] - China is one of the countries with the most severe earthquake activity and disasters globally, with 7% of the world's land experiencing 33% of the continental earthquakes [1] - Approximately 57% of the population, 51% of cities, and 58% of land in China are located in high-risk earthquake zones [1] - The capacity for earthquake disaster risk identification and prevention has been continuously improved in recent years [1] Earthquake Warning System - When an earthquake with a predicted magnitude greater than 4 or an intensity higher than 5 occurs, warning information will be disseminated through various channels such as warning terminals, mobile messages, TV pop-ups, and emergency broadcasts [3] - Earthquake warnings will use a color-coded system to differentiate the severity of the earthquake, with red, orange, yellow, and blue indicating levels from strong to weak [5] - Warnings are specifically targeted to areas that may experience damage or strong tremors, rather than being sent indiscriminately across the country [5] Distinction Between Prediction, Forecast, and Warning - It is important to note that receiving an earthquake warning indicates that an earthquake has already occurred, and there is a distinction between prediction, forecast, and warning based on timing [7] - Earthquake prediction is a scientific research activity, while earthquake forecasting is a government action that follows specific procedures [7] - Earthquake warnings are issued after an earthquake has occurred to alert the public to take emergency measures [7]