Unable to test, difficult to experiment, and difficult to simulate. Technology is taking off and times are changing. The "dreams of the ancients" are being realized one after another. Did you not see that the "Chang'e 4" will be launched soon and will be found on the moon 384,000 kilometers away from the earth? Did you not see that the "Eye of China" is located in southern Guizhou? , the deep eyes point to the vast and deep space. However, it is easy to go to the sky, but it is difficult to enter the earth. With the development of human society to this day, it is still difficult to predict earthquakes.

What is going on? A well-deserved worldwide problem. According to the China Earthquake Science Network, this is mainly because: 1. The research object of earthquake prediction is a complex geophysical process that occurs deep underground, and it is invisible. . 2. The existing observation methods are indirect. Earthquakes generally occur at depths of 20 to 30 kilometers underground, so it is difficult for humans to directly observe them, so we can only rely on ground observation data to infer and infer the internal conditions of the earth. . 3. It is difficult to conduct experiments and simulations. Earthquakes are large-scale underground rock mass ruptures on the earth, and their gestation processes span years, decades, or even longer, so it is difficult to describe their nature using classical physics. It is difficult to simulate them in the laboratory or in the field. 4. The research results are difficult to test. In the same area, a strong earthquake may occur only once in different areas and for decades, centuries or even longer. The seismic processes and mechanisms of earthquakes vary greatly from time to time, making it difficult to seize the opportunity to test research results.

Why do different countries release different magnitudes after an earthquake? Earthquake-related information, of which magnitude is the most obvious because it represents the size of an earthquake. Some people find that sometimes the magnitude measured in our country may be different from that measured in other countries.

Pan Huaiwen, director of the China Seismological Network Center, said in an interview with the People's Daily that the slightly different magnitudes released are mainly due to different methods of determining magnitudes. Currently, China basically uses surface wave magnitudes to determine magnitudes. Uniformly expressed in meters; however, seismic agencies in other countries and regions, such as the United States and Europe, usually use moment magnitude to measure, "so our country and other countries do not use the same scale. This difference is completely normal. We One cannot simply say who is more accurate. "Pan Huaiwen also said, "China's earthquake monitoring and rapid reporting capabilities are at the world's advanced level. In terms of earthquake monitoring, the lower limit of overall monitoring capabilities in China's domestic areas is 3.0, and even lower than 2.0 in densely populated areas. In terms of rapid earthquake reporting, China can provide automatic rapid reporting results within 1 to 2 minutes after an earthquake, and official rapid reporting results within 10 minutes. "In fact, scientists have made unremitting efforts in earthquake prediction. For example, they have discovered many "natural early warning devices" by observing nature. In addition, with the development of big data technology and computer technology, earthquake prediction technology is developing Outside the laboratory, ordinary people can also participate in the collection and transmission of seismic information.