Can the earthquake be predicted?

The earthquake occurs when tectonic plates that are the basis of the continents were forcibly slipped around and caused serious vibrations. Unlike the eclipse, the predicification of the earthquake was 70 years ago. However, there has been some progress in recent decades.

In February 1975, scientists predicted the earthquake five hours in advance. The earthquake occurred in Haicheng in northeastern China, and it was the first time the earthquake prediction was true. Millions of people had time to evacuate their homes and factories before the earthquake, which saved tens of thousands of lives. Although many cities were completely destroyed, only a few hundred people died. In August 1976, near T'Ang-Shan near another Chinese earthquake. Although the earthquake was foreseen several years in advance, about 700,000 people still died of an earthquake. It seems that long -term predictions are limited. Other changes are also observable when the rock begins to Stland, including changes in electrical resistance and speed at which sound waves spread through the rock. The swelling of the cracks in the rock before breaking is called dilation . It starts when the strength on the rock is about half the power needed to break.

In Russia and the United States, small earthquakes were foreseen up to five years in advance, but predicting large earthquakes or earthquakes around certain mistakes may be difficult. The degree of security must be high to warn. The prediction of the earthquake is still a very imperfect science.

In 1966 in Denver in Colorado, waste fluids were injected at high pressure into the well. This released friction between the rocks in an error and caused a small earthquake. Using this technique, Que was discussed to release pressure in places like San Andreas Fault, but has not yet been implemented. Obviously, smaller controlled shocks are more convenient than huge tectonic releasestress. The earthquake disturbing the operation of nuclear power plants is a special problem that encourages research to predict their occurrence.