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In science, the occurrence of earthquakes can be said to be unpredictable by any of us. The current research on this aspect is still far from that of science and technology. According to the latest research at Arizona State University in the United States, in the previous San Andreas fault earthquake forecasts, one less problem was considered, that is, the problem of "slow earthquakes", which increased the risk of the major earthquake in the San Andreas fault in the United States.
U.S. geophysicists say that in the southern part of the San Andreas fault, the entire California Karizo Plain may have occurred in the northern and southern parts of San Andreas because they have to maintain the problem of the central part of the fault. And now there are unprecedented ways to move, making major earthquakes more likely. This is the most serious problem facing the United States at present.
American geologists have always believed that the fault in the central part of the San Andreas fault is about 129 kilometers, and it has been in a stable state of peristaltic motion and a safe energy release process. Unexpectedly, in the past few decades, this change has ruptured the entire fault from north to south. New research from Arizona State University shows that the movement of this central part is not as stable as previously thought and becomes more abnormally variable.
Scientific research shows that during the energy release over the past few months, this series of small viscous sliding movements (sometimes called "slow earthquakes") could trigger large-scale destructive earthquakes, one of which was the 2004 magnitude 6 earthquake event, which looked like a steady continuous creep that was actually an event of acceleration and deceleration along the fault.
Scientist Shirzaei pointed out that these briefly slow earthquakes caused increased stress in parts of the northern and southern fault locked areas of the interrupted parts. A typical example is that these flanking sections experienced two magnitude 7.9 earthquakes in 1857 (Tejonburg) and 1906 ( San Francisco ). So we cannot underestimate the existence of this problem.
Scientist Shirzaei also pointed out that based on our observations, we believe that the earthquake danger in California changes over time and may be higher than people have thought so far. Scientist Shirzaei also added that accurate estimates of such different dangers are crucial for inclusion in earthquake forecasting systems in operation. According to current time-independent models, there is a 75% chance of earthquakes that may occur in northern and southern California in the next 30 years.
Author: Text/Luo Zhaochun
