The record of blood moon in history is true, but there is no scientific basis to link it with natural disasters at that time.
The "red moon" of the blood moon is the moon during the total lunar eclipse, which has nothing to do with the tengu. Although the red moon occurs in the full moon, it is said that werewolves will transform on the full moon night. You can also tell your children not to worry about werewolves when the moon is red.
When the total lunar eclipse occurs, the surface color of the moon looks like dark red, commonly known as "red moon". This is because when the total lunar eclipse occurs, after the moon enters the shadow of the earth, the earth has a thick atmosphere, which can refract and scatter sunlight.
There are seven kinds of sunshine: red, orange, yellow, green, cyan, blue and purple. Among them, the wavelength of red light is the longest, and the red light refracts and scatters the most to the surface of the moon, so the "red moon" appears.
In other words, when there is a total solar eclipse on the moon (this is exactly the total lunar eclipse on the earth), the half moon facing the earth is not completely dark, but as red as the morning/evening on the earth-this is the moon in the state of total lunar eclipse when viewed from the earth, and of course it is red. I think it must be spectacular to see the earth on the moon at this time. It should be a black disk surrounded by a big red halo.
The rare spectacle of "Blood Moon" has many legends all over the world. In many predictions, the "blood moon" symbolizes that something unusual will happen in the world.
In ancient times, the disappearance and reappearance of the moon would remind people of death and the power of soul ascension and rebirth after death. The cycle of the moon will also remind people of their relationship with fate.
According to ancient folklore in China, if the moon changes color, there will be disaster. Youth is hunger, red is fighting, yellow is happiness, white is drought, black is water, and people are sick or dead.