Fishing boats fishing for autumn swordfish caused a vision in the sky of Zhoushan, why did the fishing turn on red lights?

What happened to the sky in Zhoushan? Many questions were asked today. The sky over Zhoushan is being retweeted like crazy on social media platforms. What's going on?

It turns out that the sky in Zhoushan is full of red and people are speculating about where this huge red color came from. Is it a pre-disaster warning? In ancient times, people saw this strange sight as a sign of disaster. Today, of course, we cannot think of it that way. After all, we are now talking about science. So, from a scientific point of view, where did this red sky come from?

In a word, it's the red lights of distant fishing and ocean-going vessels refracting the water vapor suspended in the air.

In addition, another netizen used Rayleigh scattering to explain the phenomenon. He said that there were many tiny particles in the center of the clouds in Zhoushan that night, about 0.7 microns in diameter, which were similar to the red wavelength of the sun. After scattering, the whole sky turned red. At that moment, a distant distant fishing boat emitted red light, which intensified the scattering effect.

On the internet, there is also a theory that this is a precursor to an earthquake. There was a previous theory about earthquake ground lights. It is believed that the phenomenon of ground light occurs before an earthquake hits. The ground lights are like the red lights in Zhoushan this time, only different in color and shape.

For example, before the earthquake in Qinghai, there was this video showing the distant horizon lit up with a dazzling white light that was very intense moments before the earthquake, and it didn't take long for the earthquake to happen. So one would like to believe that the heavens have given people a hint that one can escape an earthquake.

But then, by comparing videos from different angles, scientists discovered that the light on the distant horizon was not a natural phenomenon, but some lights in the distance were shaking because of the earthquake. This is what appears in the final video. The phenomenon of ground light before an earthquake is more like a phenomenon conceived by people in their psychological comfort. Its essence is due to a lack of awareness.

The source of the red sky in Zhoushan this time was the autumn swordfish. A fishing boat fishing for autumn swordfish turned on the red light, and that was the source. The red light penetrates strongly, so it appears to be scattered.

Many people will wonder why you need to turn on the lights to fish for autumn swordfish. Turning on the light is not just for illumination, but more importantly for fishing. The most common method of catching an autumnal swordfish is to take advantage of its attraction to light.

The swordfish is a migratory animal and is extremely sensitive to light, especially red light. As soon as a certain level of red light is switched on, the fallfish will gather in the red light. Thanks to its uniqueness, the fallfish has a special method of catching fish.

First, you will use your radar to find where the fallfish are gathering, then slowly drive the boat in and turn on the strong light to slowly recall the distant fallfish near the boat. Then turn on the white fallfish light, which will make the fallfish active and swim near the light. When there are enough fallfish, the net will be pulled up.

Gradually turn off the white fallfish light and then turn on the red fallfish light. This light calms the fallfish and makes it easier for us to pull the net up and catch them. In this way, in one operation, we can catch a boatload of autumn swordfish.

You can see that fishing is now about a method. After all, fishing with a net alone is not keeping pace with the times. Advances in technology have naturally given rise to more ways of fishing, but they also face a problem. People are catching fish too quickly and catching too many fish at once, which has a significant impact on marine life.

For example, the 10-year ban on fishing in the Yangtze River is actually due to human overfishing, which has led to the Yangtze River reaching a point where there are no fish left to catch. So there has to be a limit to everything, a limit to what is appropriate.