1. Why do earthquakes occur on the earth? The earthquake occurred due to plate movements, and the rocks on the earth's crust were squeezed to form new fractures, and it was also possible that the original cracks were misaligned. Generally, very strong earthquakes occur at the original faults, so earthquakes often occur in some places, while earthquakes never occur in others.
earthquakes are often accompanied by volcanic eruptions, because volcanic eruptions include magma rushing out. The area where these magmas are cracks in the rocks on the earth's crust. A large amount of hot magma gushed out, and its volume expanded rapidly and the cracks continued to grow, causing an earthquake.
At present, humans have not yet fully explored earthquakes. Some people wonder how the thrust that produces earthquakes comes from? According to some experts' speculation, when existing rocks in are close to breaking, they will be subject to pressure from the atmosphere and water source. The gravitational force of the sun and the moon on the earth may cause the fracture to increase, which will trigger an earthquake.
2. How does an earthquake occur? You should know this knowledge:
1 and Volcanic earthquakes
Volcanic earthquakes are often accompanied by volcanic eruptions, so only earthquakes in volcanic areas are called volcanic earthquakes. earthquakes caused by crust fractures caused by magma activity and gas explosions will be called volcanic earthquakes. This kind of earthquake is very rare, accounting for only 7%.
2 and tectonic earthquakes
earthquakes caused by continuous movement of underground rock strata due to crust movement. earthquakes usually occur very often and may occur around the world, and the impact range is large , with very strong destructive power, accounting for 90% of the probability of all earthquakes.
3, collapse earthquake
collapse earthquakes generally occur in mines and caves. Generally, due to the collapse of the top of the underground rock, the probability of such earthquakes is very low, but if someone mines it, it may cause fatal danger.
4, induced earthquakes
Induced earthquakes are earthquakes caused by reservoir water storage and other reasons. earthquakes generally occur in fixed reservoirs or oil fields.
5, Artificial earthquake
Artificial earthquake is caused by artificial objects. If some drugs are used to blast, of course artificial earthquakes can also form induced earthquakes. If the pressure of the earth's crust is increased when the reservoir is injected with water, it may cause induced earthquakes.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-