First of all, what is an earthquake?
Earthquakes which are also called earthquakes. Earthquakes occur when rocks are displaced from the ground. In addition, when the gas under the ground comes out through the mouth of the volcano or in some other way, the position of the gas becomes empty, so that the upper part of the earth occupies that space to keep the balance, causing the earth to shake. And this is what we call an earthquake. The seismometer is called the Richter scale.
The largest earthquake ever recorded on the Richter scale was on 22 May 1980 in Chile (9.5). The largest earthquake in Bangladesh was recorded in 1918 (7.8 magnitude). The largest earthquake in Bangladesh was in Chittagong (40 times).
Now I know why the earthquake?
Earthquake epicenter:
The center of an earthquake is called the center of an earthquake. From this center the vibrations spread in all directions through different waves. When the compressive strength of the rock goes beyond tolerance, cracks appear in the rock and energy is released. So often the epicenter of an earthquake is located in the fault line. The center is usually located within 18 km of the earth's surface. However, 800 km. Earthquakes can also arise from deep mantles.
Earthquake causes:
Earthquakes usually have three main causes.
Surface:
Our surface is made up of many plates. These plates are separated from each other by faults or cracks. Beneath these plates are all the molten material in the interior of the earth. Displacement of these molten substances due to any natural cause also causes some displacement of the plates. This causes any part of one plate to penetrate to the bottom of the other plate, causing the ground to vibrate. And this vibration appears to us in the form of an earthquake.
Volcanic:
Earthquakes can sometimes be caused by volcanic eruptions and molten lava eruptions.
Avalanche:
Sometimes earthquakes can be caused by large-scale avalanches from mountains or elevations.
Landscaping:
For some reason, a large boulder from the mountains collapsed on the crust and caused an earthquake. There are usually more earthquakes near Fold Mountains.
Heat radiation:
When the crust is compressed by radiating heat, cracks and folds are formed and earthquakes occur.
Underground steam:
There are many reasons for the formation of underground steam. As this vapor continues to rise it pushes the lower part of the crust; The result was a strong earthquake. And earthquakes.
Glacier effects:
Sometimes huge glaciers suddenly fall down from the foothills. This caused an earthquake and an earthquake.
What to do in case of an earthquake?
According to the Red Cross, the best way to protect yourself during an earthquake is to use the 'drop, cover, hold on' method. This means that when the vibration starts, sit on the floor (drop), then take shelter under a hard table, desk or hard furniture that has space under it (cover). Sit there crouching (hold on).
When an earthquake starts, get out of the building immediately. After the earthquake, there may be another tremor, which is known as ‘after shock’. So do not use the elevator, go down the stairs but do not take shelter under the stairs.
When the roof collapses during a building collapse, an empty space is created right next to the object on which it falls. This is called a 'safety zone'. So during an earthquake, sit on your knees next to a sofa or a large piece of furniture.
If it is not possible to get out, take shelter next to a wall of the building, which is on the outside. As if that wall could be broken to save you. In case of an earthquake, you must carry one or more pillows or something hard on your head. The most important thing is to save the head injury. Take shelter under solid columns or beams.
If you can't get out of a house made of tin, take shelter under a hard bed or stool.
If you are inside the car, park the car in a place where there are no big buildings nearby. Never stop a car on the bridge.
If the building collapses and you get stuck, you can't find a way out, don't lose hope. Have courage. Courage and hope will keep you alive. Wait patiently. Keep thinking about how to get your screams or signals to the rescuer.
Naksha Bibi, a Pakistani woman, survived a 63-day earthquake in 2005 after being trapped in an earthquake. In Bangladesh, Reshma was rescued 18 days after the Rana Plaza collapse in Savar. So keep your morale strong no matter what happens.