What are the precursors of earthquakes?

Mainly: the weather is extremely sultry and people are very anxious; Or a long drought without rain or rainy days; Yellow fog scattered; The sun is dim; Strange wind madness; Hail in June (flying snow) and so on.

Others: for example

1: Clouds in the sky will appear in the form of extremely long rays, and the position where the center of the ray points is the position of the central earthquake. Such a Lei Yun is easily observed (Lei Yun).

2. Before the earthquake, the color of the cloud was white, gray, orange or orange-red, and it was not easy for strong winds to change its shape. There is a clear dividing line between the sky and clouds, and there are many waves. At present, there is no unified theory about the formation of earthquake clouds, just some hypotheses. )

It refers to the fog coming out of the ground before the earthquake. This fog has many colors, such as white, black and yellow, and sometimes it is colorless. It often appears within a few days to a few minutes before an earthquake, often accompanied by a strange smell, sometimes accompanied by noise or high temperature. (Ground gas, also known as ground fog or ground fog)

Sorry, I just saw it. In summer, it is cloudy or thunderstorm. It's normal for the weather to get faster, so there should be no earthquake.

As long as you don't have the phenomenon mentioned above, you should be fine. . .