Does Hangzhou belong to the earthquake zone?

Hangzhou does not belong to the earthquake zone.

Earthquakes in China are mainly distributed in five regions: Taiwan Province Province, Southwest, Northwest, North China, Southeast Coast and 23 seismic zones.

Including all or part of Hebei, Henan, Shandong, Inner Mongolia, Shanxi, Shaanxi, Ningxia, Jiangsu, Anhui and other provinces. Among the five seismic zones, its earthquake intensity and frequency are second only to the "Qinghai-Tibet Plateau Seismic Zone", ranking second in China. Because the capital circle is located in this area, it attracts people's attention.

According to statistics, there have been five recorded earthquakes of magnitude 8 in this area; 7-7.9 earthquake 18 times. In addition, it is located in a densely populated, large-scale city with developed politics, economy, culture and transportation, and the threat of earthquake disasters is extremely serious.

Extended data

With the development of science, people's understanding of earthquakes has gone out of the myth. Epicurus in ancient Greece believed that the earthquake was caused by the wind being enclosed in the earth's crust, and as a result, the earth's crust was divided into small pieces and kept moving, that is, the wind made the earth shake and caused earthquakes.

Then came Lucretius' wind theory, that is, some huge wind and air force from the outside or the earth itself suddenly entered the void of the earth. In this huge void, first it groaned and stirred up a whirlwind, and then the resulting power was driven out of the outside world. At the same time, deep cracks appeared on the earth, forming huge cracks. This is an earthquake.

Aristotle believes that earthquakes are caused by sudden underground winds and flammable objects burning underground.

At the beginning of the 20th century, scientists began to study seismic waves deeply, which opened a new page for earthquake science and even the whole earth science. Three hypotheses have been put forward one after another:

First, 19 1 1 year, Reed proposed that when the strain energy accumulated in the earth exceeds the strength of rocks, faults will occur. After the fault is formed, the rock elastically bounces back and restores to its original state, so the accumulated energy is suddenly released, causing an earthquake. This is the so-called elastic rebound theory;

2. 1955 Takeo Matsuzawa, Japan, proposed that the underground rock has uneven heat conduction, and part of the molten volume expands, squeezing the surrounding rock, leading to the earthquake of the surrounding rock. This is the so-called "magma shock theory";

Thirdly, American scholar bridgman put forward the "phase transition theory" that underground materials change from one crystalline state to another at a certain critical temperature and pressure, and the volume suddenly changes, resulting in an earthquake.

.

Baidu Encyclopedia-China Earthquake Belt