Earth, this vibrant planet, always attracts people's attention with its unique charm. And earthquakes, as a natural phenomenon on Earth, are both frightening and curious. So, how exactly do earthquakes erupt?
The occurrence of earthquakes is closely linked to the structure of the Earth's interior. The Earth's interior is made up of three parts: the crust, the mantle, and the core. The Earth's core is located at the lowest level, with a temperature of up to 5,700 degrees Celsius and a pressure equivalent to more than 3 million atmospheres. Above the Earth's core, there is a liquid mantle, which is like a pot of hot magma, always looking for a way out.
The Earth's crust is the outermost layer of the Earth's surface and consists of multiple groups of fractured blocks. Rocks in the mantle are affected by the high temperature of the Earth's core, which causes thermal expansion. When this pressure once exceeds the capacity of the earth's crust, it causes the earth's crust to rupture. At this time, the energy that has been stored for a long time is released in an instant, forming a seismic wave, which in turn causes the ground to shake.
In general, the outbreak of earthquakes is the result of a long-term accumulation and sudden release of forces inside the Earth. The process is both mysterious and spectacular, creating a sense of awe for the power of nature.