Professor Cao is not alarmist, and the high-pressure gas column originating from the earth's crust is the number one killer on the seabed.

Geography books in junior high school say that the temperature and density of the Earth's interior are uneven, forming mantle convection or mantle plumes inside the mantle. When a hot substance rises to the shallow part of the earth, partial melting occurs due to a decrease in pressure. Under the action of external forces, these molten materials come together and form a magma sac in the shallow part of the earth. When the pressure of the magma sac is greater than the pressure of the formation, the magma breaks through the earth's crust along the fault or weak point, causing a volcanic eruption.

But before this process, or if the magma sac is filled with gas, it is not directly sprayed with magma, but with high-heat and high-pressure gas first.

There are also volcanic eruptions on the seabed, which are less powerful and less frequent than on land, because the sea is under pressure, which will suppress the magma that is about to erupt, and the deeper the sea, the less likely the magma eruption.

In addition, because of the high pressure in the deep sea, the magma erupts with less force and slower speed. Because of the low temperature of the deep sea, the magma will cool down quickly once it erupts, which is not so dangerous in total.

When the deep sea encounters a magma gushing, as long as the scale is not large, the diver has time to escape.

I'm afraid that what is spewed out is not magma, but high-pressure gas, magma is colored, the deep sea is dark, and even a little bit of magma will be very conspicuous.

The high-pressure gas is colorless, and the gas travels faster in the seawater, making it difficult for divers to guard against it.

Fortunately, there is not that much air in the earth's crust, and there have been few cases of professional divers being injured by high-pressure gases around the world.

But there have been many such things in the people, for example, there is a profession called abalone picker in Australia, where the black gold abalone is expensive, and the government stipulates that machines are not allowed to be used, and manual collection must be made.

There is a sea area where black gold abalone is produced, the crust is unstable, there are multiple cracks in the earth's crust, and from time to time hot gas will be spewed, hurting many abalone pickers.

All in all, this situation is still relatively rare, and Ao Muyang is not too worried.

When he went into the water, he took the electric eel Thor with him.

Thor has now adapted to the environment of seawater, and Ao Muyang fed it a lot of golden droplets, making it almost reborn.

However, Thor is not a killer whale or a sperm whale, it does not have strong diving ability, cannot adapt to the high-pressure environment of the deep sea, and can only play on the surface.

This time, the tiger also came.

Ao Muyang put on the diving gear and went into the water, and the tiger leaned in.

Seeing this, Thor thought that he was in danger, and immediately rushed over to attack the tiger, and as soon as he got started, he was a killer move: a special move - an underwater taser!

The tiger shuddered, then stared at Thor with wide eyes.

The nirvana failed, and Thor was a little confused: This thing is so big, what's the matter? It's a little too fierce, master, you can do it yourself, I have to run away!

How could it run, the tiger swooped down and chased after it, pressing up with its huge body, bang, black clouds crushed the city, and Mount Tai pressed the top!

However, it didn't want to kill Thor, but wanted to toss Thor.

Because the electric shock that Thor gave it just now was really refreshing.

The tiger is not a shaky M, the reason why it enjoys the electric shock is because the body is numb and crispy and feels a little refreshing, and the second is that it finds that after receiving the electric shock, the parasites and small parasitic fish on the surface leave its body one after another and are electrocuted......

As the pet that eats the most gold drops underwater, the tiger's brain has also been improved the most, and the killer whale is naturally intelligent, and it can now catch up with a seven- or eight-year-old child in some aspects.

The tiger knows that the parasites on its body are not friendly to it, but it has no hands and cannot clean it up.

So, when Thor dealt with the parasite with an electric shock, it came to its strength, another shot!

Ao Muyang is not worried that the tiger will eat Thor, he is worried that Thor will die of exhaustion - the essence here is the essence of energy, and the discharge of electric eels needs to rely on reserve energy.

He patted the tiger on the head to signal it to calm down, and then put Thor on its head, so that the tiger could not see Thor and could not toss Thor.

Feeding the two guys a few drops of gold, Ao Muyang dived underwater, and now there is a deep trench below him, and the ship's marine radar shows that the underwater depth is 288 meters.

At first, the light was good, the deep sea waters were not polluted, the blue sea was like glass, and the sunlight could penetrate several meters unscrupulously.

At this time, the eyes can deceive, the depth you see is not real, but fortunately, when you reach twenty meters underwater, the light starts to deteriorate, and the ocean becomes deeper.

This is a reminder that the average diver has to remember this color, they must not go beyond this depth, otherwise there will be danger.

Continuing down, the sunlight is absorbed by the sea water so badly, to a depth of forty meters, the sunlight here is still good, but it is another benchmark for humans, and here, professional divers have to be deterred, and the water pressure here is already terrible.

The water pressure of forty meters underwater is nearly 4 atmospheres, which is equivalent to more than 400 adult men pressing on the body, so even if you are as strong as a, you can't bear it.

Through the diving helmet, he could see that the light was getting worse and worse.

A peculiar sensation reappeared, as his eyesight gradually deteriorated as the light deteriorated, which was his normal vision, which required the use of light.

Then, as if his eyes had switched to a different signal mode, he was able to see at the bottom of the ocean without light, so that his eyesight gradually improved, and the scene became clearer and clearer.

He saw a school of hairtails, and they didn't move, they floated straight up and down in the water, like sticks, they were cold, they were lonely, they were out of the world, and then they would be caught in the nets......

Yes, this is how many hairtail fish are caught in nets......

This is already about 100 meters deep, a forbidden area for humans, and the unassisted unassisted diving record for humans is at this distance, with explorer Zeon Nairi setting a diving depth of 116 meters in 2006.

Continuing to dive, the sea water is already pitch black below the depth of 200 meters, although theoretically there are still light particles that can come here, but there are too few to come, and the light created can no longer be captured by the human eye.

When it arrived here, the saltiness, temperature, and density of the sea water changed, and the tiger was not interested in such a depth, and when it saw that Ao Muyang was going to continue diving, it wagged its tail and stopped.

Continuing down to about 280 meters, this is close to the limit of human diving, and the world record for diving with equipment is 332 meters.

When you get here, this sea area also goes to the bottom of the sea.

Ao Muyang made a short stop at the bottom of the sea, and then resurfaced.

Everything is normal on the bottom of the sea in this area, he overlooks the surrounding area, the water temperature is normal, and the topography of the seabed is normal.