A 6.0-magnitude earthquake occurred in Lu County, Sichuan. The epicenter was as deep as 1,000 meters. Why do earthquakes mostly occur in the early morning or late at night?

Earthquakes often occur in the early morning or late at night because of the gravity of the earth. When the moon approaches the earth, strong tidal fluctuations occur in the oceans on the earth's surface. The huge friction caused by this fluctuation causes the earth's temperature to increase sharply, causing the core of the earth to melt. Under the action of high temperature and high traction, the magma in the core of the earth melts. Rotational rolling occurs, resulting in a magnetic field. This "super giant" magnetic field forms a "protective shield" for the earth, reducing the invasion of cosmic rays from space. Although the evolution of the weather system is complicated, the essence is the strength, weakness, advance and retreat of warm and cold air masses, and the periodic atmospheric tides caused by the periodic changes in the moon's tidal force. Based on this, it is speculated that during the periodic movement of the moon, tidal force vibrations will occur, so different tidal forces also "direct" the ever-changing weather and climate.

1. As the earth is constantly moving and changing, it gradually accumulates huge energy, causing sudden rupture of rock layers in some fragile areas of the earth's crust. , or cause the original fault to move, which is an earthquake. ?Most earthquakes occur in the earth's crust. According to scientific monitoring, tectonic earthquakes mostly occur within 5 to 30 kilometers below the surface and are highly destructive earthquakes.

At the Earth's North and South Pole, magnetic field lines enter and leave from these two places. The movement direction of electrons is parallel to the direction of the magnetic field lines. The movement of electrons is not affected by Ampere's force, so it has a faster escape velocity. There will not be enough potential difference between layers due to accumulation, and earthquake phenomena will not occur.

3. The method of preventing earthquakes can be inspired by the principle of "lightning rod". People can monitor electromagnetic anomalies between different layers in the earth's crust. To control earthquakes, you can also prevent destructive earthquakes by establishing a "shock-absorbing mechanism" in the formation.

4. Earthquakes are divided into five categories:

1. Tectonic earthquakes: The cause of tectonic earthquakes is that underground rock layers are affected by geostress. When the geostress is too great , when the rock layer cannot bear it, sudden and rapid rupture or dislocation will occur. When the rock layer ruptures or dislocates, it will stimulate a seismic wave that spreads around. When the seismic wave reaches the surface, it will cause the ground to shake. 85%-90% of the world's earthquakes and all earthquakes that cause major disasters are tectonic earthquakes.

2. Volcanic earthquake: Earthquake caused by volcanic eruption.

3. Reservoir earthquake: Earthquakes occur in the reservoir area due to the storage and release of water from the reservoir.

4. Subsidence earthquake: An earthquake caused by subsidence of the ground.

5. Artificial earthquakes: Earthquakes caused by man-made activities such as nuclear explosions and gunfire.