How does the Earthquake Administration predict earthquakes?

Earthquakes will cause various physical and chemical changes underground and on the ground, providing people with information. As long as people carefully observe and grasp the laws of earthquake precursors, earthquake prediction will one day be realized. In terms of earthquake prediction, our country's earthquake workers have made gratifying achievements. When the 7.3-magnitude Haicheng earthquake occurred on February 4, 1975, my country made a successful prediction. This was the first successful earthquake prediction in human history. Later, it successfully predicted the 7.3-magnitude earthquake in Longling, Yunnan on May 29, 1976, and the two 7.2-magnitude earthquakes that occurred between Songpan and Pingwu in Sichuan on August 16 and 29, 1976. There have been several better earthquake predictions in the past decade or so. Successful earthquake prediction not only greatly reduces casualties, but also has obvious economic and social benefits. These earthquake examples show that earthquakes have precursors and can be predicted and prevented.

In the period before an earthquake, there will always be some abnormal changes near the earthquake area. Such as changes in groundwater, such as sudden rise and fall, or change of taste, muddyness, sound, or bubbling. Meteorological changes, such as sudden cold and heat, severe droughts and floods, changes in electromagnetic fields, abnormal reactions of animals and plants before earthquakes, etc. Comprehensive research based on these reactions, coupled with professional departments' processing and analysis of instrument observation data from aspects such as earthquake mechanisms, seismic geology, geophysics, geochemistry, biological changes, celestial influences, and meteorological anomalies, can determine the time of the earthquake. , location and magnitude are forecasted. For example, the successful prediction of the 7.3-magnitude earthquake in Haicheng in 1975 is an example. However, due to the complexity of the causes of earthquakes and the suddenness of earthquakes, as well as people's current limited scientific level, earthquake prediction is still a worldwide problem until now. There is no reliable way and means in the world that can accurately predict all damage. Sexual earthquake. For this reason, seismologists and experts from various countries are working hard to explore.