Earthquakes have always been one of the most worrying issues for people, because the occurrence of earthquakes will bring a lot of disasters to our lives or society, and will also cause floor collapses. Therefore, in our lives, we are particularly worried about earthquakes. If the level of occurrence is high, it will also bring great losses.
At 15:02 on January 2, 2022, a magnitude 5.5 earthquake occurred in Ninglang County, Lijiang City, Yunnan Province. The depth of this earthquake was 10 kilometers, causing a lot of property losses and some casualties. Although earthquakes occur all year round in my country, it is generally small earthquakes. For example, some time ago, a magnitude 3.0 earthquake occurred in Nanyang, Henan.
However, relatively speaking, that earthquake was not as big as this time, and there were no losses like this time. Therefore, if the earthquake magnitude is also high, the greater the impact on our lives, and it will make people more worried and scared. After all, every earthquake will bring a lot of losses.
Now, relatively speaking, we cannot achieve very accurate earthquake warnings, nor can we feel the arrival of the earthquake a few days in advance, but there are many small animals that can do it, which makes many people curious why earthquakes occur? Why can animals perceive in advance? With these questions in mind, let’s learn about the reasons together.
The number of earthquakes occurring every year
Before this, let’s take a look at the number of earthquakes occurring every year around the world. The so-called earthquake is also called earthquakes by us. To put it bluntly, it is vibrations on the surface. At this time, the vibrations caused by the earth’s crust releases energy. This natural phenomenon is relatively common.
This is because according to relevant statistics, more than 5 million earthquakes occur on the earth every year, which means that the number of earthquakes happens every day is basically about tens of thousands of earthquakes. The reason why these earthquakes are not perceived by people is actually very simple, that is, they are too small or too far away from us, so they don’t feel this way.
You should know that the land area on the earth is about 29.1%, of which the remaining 70.9% belong to the ocean area, and earthquakes will occur in the ocean. Therefore, if the earthquake occurs in the ocean, we will not be able to perceive it, and we will basically not feel that the earthquake has occurred, and everyone will not feel that it is so big.
But if the earthquake occurs in the ocean is very large, it will cause tsunamis and other hazards. Therefore, ocean earthquake cannot be underestimated. You should know that tsunamis will cause great harm to coastal cities and even endanger your physical safety.
4 major reasons for earthquakes
We all know that earthquakes are very harmful when they occur, but many people do not understand why earthquakes keep occurring on the planet we live in? In fact, there are also related reasons, and it is also the factors that cause earthquakes. There are four factors that induce earthquakes:
① tectonic earthquake , earthquakes occur frequently, accounting for more than 90% of the earth. It is the most common earthquake factor for us. The reason is that the structure of the rock strata under the ground occurs. After these movements occur, they exceed the ability of the clouds to withstand the ground. Therefore, the fault of the rock strata causes ground vibrations on the surface, which is the most harmful and the most destructive earthquake.
②Volcanic earthquake , As the name suggests, volcanic earthquakes are earthquakes caused by volcanoes when they move. Generally speaking, the range of occurrence is only around the volcanoes, and it will also occur with the eruption of volcanoes. However, there are generally no people living around the volcanoes, so there is no need to worry about the harm.
③ Falling earthquake, is the ground sinking caused by the collapse of the ground, which causes earthquakes. For example, there are many caves under the ground in the mountains. After a long period of accumulation, these caves cannot bear the weight on it, which causes the collapse and cause earthquakes. Generally, as long as they are not above the cave, it is relatively safe, and it is also close to the surface, so it is not as terrifying as the tectonic earthquake.
④Architective earthquakes, The so-called man-made earthquakes are earthquakes caused by people's activities. This is generally common in industrial areas, nuclear explosions and other areas, and there are reservoirs stored in underground water. This will increase the pressure of the earth's crust and trigger the occurrence of earthquakes. These are earthquakes caused by man.
What will animals do if they know that an earthquake hits?
After knowing how the earthquake came, it is necessary to take corresponding construction measures and early warnings. However, with today's technology, it is difficult to predict the coming of an earthquake. However, in nature, in general, some time before the earthquake hit, many small animals would predict the arrival of an earthquake, and then they would flee one after another.
For example, before an earthquake hits, fish will turn up their belly and float on the water, and dogs you raise will be manic and uneasy before the earthquake comes, and even run and bark. In addition, mice will flee in groups, which indicate that the earthquake is coming.
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