The word "natural and man-made disasters" is something we all don't want to meet. What is a natural disaster? natural disaster

The essence is those disasters in nature.

The natural environment in which we human beings live sometimes

Some unusual changes have taken place,

These changes often act on our human society, causing us great losses and constituting disasters. Since disaster is inevitable, should we wait for it, or should we bravely confront it and defeat it? The answer is definitely disaster resistance. How to fight disaster? As the saying goes, "know yourself and know yourself, and you will win every battle." If we want to minimize these disasters and overcome them, we must understand why disasters happen and how we should deal with them.

There are really countless disasters on the earth.

Earthquakes are especially harmful.

What we have experienced,

It seems that there is only Wenchuan earthquake. At that moment, the earth shook. Although it is far from the source, we

Still feel the damage caused by the earthquake.

What forces make the building instantly destroyed?

What power keeps so many fresh lives away from us? Maybe,

Understand the fate of earthquakes

Through it, it will reduce those damages!

What is an earthquake? It is the function of the force produced by the constant change of the earth's crust.

It is caused by the deformation, fracture and dislocation of the crust and strata. What is a super earthquake? 10.0 earthquake

It refers to an earthquake with a strong shock wave. Its power and destructive power are several times that of an atomic bomb.

Therefore, the impact of super earthquakes is very extensive and destructive.

Earthquakes,

This is the shock wave produced by the violent rupture inside the earth.

Cite within a certain range

The ground vibrates. The place where seismic waves are generated is called the source. Of course, the distance from the source is the most.

The nearest place is the place most affected by the earthquake. Usually, a big earthquake happens somewhere.

During the earthquake on February 2, a series of earthquakes often occurred in a period of time, the largest of which was called the main shock, the earthquake before the main shock was called the foreshock, and the earthquake after the main shock was called the aftershock. Knowing the cause of the earthquake, of course, we must understand the precursors of the earthquake. Earthquake precursor refers to the abnormal phenomenon before the earthquake. Under the action of in-situ stress, in the process of stress and strain accumulation and strengthening, rock mass will cause seismic activity and other substances in the source and its vicinity. The obvious changes of surface and geophysical anomalies such as geomagnetism, geoelectricity, gravity, groundwater level, hydrochemistry and abnormal animal behavior. Generally speaking, these abnormal changes related to earthquake preparation and occurrence are called earthquake precursors (called earthquake anomalies). It includes seismic microscopic anomalies and seismic macroscopic anomalies. Earthquake anomalies that can be directly perceived by human senses are called earthquake macroscopic anomalies. Macroscopic anomalies of earthquakes are diverse and complex, with hundreds of kinds and types of anomalies and thousands of anomalies, which can be roughly divided into groundwater anomalies, biological anomalies, geoacoustic anomalies, geooptical anomalies, electromagnetic anomalies and meteorological anomalies. People's senses can't be detected, and only special instruments can detect earthquake anomalies, which are called microscopic anomalies of main earthquakes and mainly include the following categories: seismic activity anomalies, geophysical changes and underground fluid changes. In fact, the most important thing to avoid risks is prevention. How to prevent it? First of all, learning earthquake knowledge, that is, learning earthquake knowledge can make you not afraid, not panic, and avoid unnecessary casualties; Understand the geological structure of family, school and office building, and master the basic earthquake defense method; Pay attention to the abnormal phenomena in nature around you; Don't listen to and spread earthquake rumors.

Second, do a good job in indoor earthquake prevention measures, minimize the storage of tall objects in the house, master the position and closing method of electricity, water and gas valves, and do not place toxic, flammable and explosive items in the house. Third, outdoor earthquake prevention measures. The main entrance, corridor and aisle are not stacked with sundries, so as to facilitate personnel evacuation, and the correct safe place is selected for evacuation and shock absorption. If disaster does come, don't panic and face the earthquake with a calm mind. Earthquakes may last only a few seconds, and it is also important to escape from them. When a destructive earthquake suddenly occurs, it is a good way to take refuge nearby and evacuate quickly after the earthquake. When you are in the classroom, you should hide quickly under the method specified by the teacher. Be careful not to touch fragile things such as glass at home and finally hide in the corner. No matter where you are, it is very important to keep a calm heart. I believe that through our joint efforts, the disaster will be defeated by us!

If it helps, please adopt it.