The power of a volcanic eruption is so great that it can cause the ground and sea to shake violently for dozens of miles around, making people feel the powerful power of nature.

The principle of volcanic eruption is a manifestation of the movement of the earth's crust, the interior of the earth is very hot, once this heat encounters the weak position of the earth's crust, it will melt and crush the rocks in the weak place, so as to eject the hot liquid inside.

The hot liquid that erupts is volcanic magma, which is also a molten rock substance, and when cooled, they become something like stone.

Volcanic eruptions are divided into a variety of situations according to different manifestations, including cracked eruptions and central eruptions, among which, there are many situations of central eruptions, such as tranquility, bursting, and intermediate, etc., a total of nearly ten eruption methods.

Magma overflows the surface along huge cracks in the earth's crust, which is the so-called fissure eruption, this kind of eruption is very calm, there is no strong explosion phenomenon, the ejected material is mostly mafic molten lava, and after condensation, it often forms a lava platform covering a wide area, which is mostly seen at the bottom of the ocean, which is one of the reasons for the expansion of the seabed.

Quiet eruption, is a large amount of hot magma calmly overflowing from the crater little by little, slowly flowing along the slope, magma high temperature, low viscosity, easy flow, no explosion, is also a kind of volcano that people can enjoy to enjoy, as long as it is not too close to the crater, there will be no danger.

Burst eruptions are more dangerous, and this method is accompanied by drastic protection, and the magma is ejected from the crater in a burst manner, which is very powerful and has a very wide range of effects, and is likely to lead to extremely heavy casualties.

There are many disasters related to volcanic eruptions in history, all of which are caused by burst eruptions, and it can be said that this kind of volcano is the most hated volcano by human beings.

Of course, these are all pediatrics, and there are more powerful forms of volcanic eruptions, such as Pliny, Wuerkata, and even Super Pliny, which can eject magma at a height of 45 kilometers.

These eruptions are named after the characters, and they are all relatively powerful and have a very wide impact, such as the Super Pliny eruption, which spews volcanic ash that can cover the entire earth, and the impact is obvious.

In addition, there are active volcanoes that erupt intermittently and repeatedly, which can have a great impact on human production and life.

Volcanic eruptions are a double-edged sword in the end, and they have both a threat to humanity and a beneficial side to humanity.

Volcanoes are polluted and destroyed, and after the eruption, large amounts of ash and volcanic gases can enter the atmosphere, which can have a great impact on the climate, in this case, dim daylight and violent storms, and even mud rain can plague local residents for months.

When volcanic ash and gases are erupted into high schools, they will be dispersed by the wind to a large distance, and a large amount of volcanic ash will block the sunlight and cause the surface temperature to drop, thus threatening the growth and normal life of animals and plants, and at the same time, it will also seriously interfere with human life.

The combination of volcanic ash and heavy rains can also create terrible mudslides that can wash away roads, bridges, inundate mountain villages and cities, and leave countless people homeless.

Of course, volcanic eruptions also have a huge benefit, that is, the volcanic ash itself is rich in nutrients, and when the agricultural land is covered with thick volcanic ash, it will become much more fertile than before, and the harvest of crops will increase exponentially.

It is precisely because of the certain benefits of volcanoes that many residents are reluctant to leave areas where volcanoes often erupt, even at the risk of their lives, because living near the volcano can get more fertile land, and every time the volcano erupts, their land is fertilized, and the annual crop harvest is very high, and their living standards naturally improve.

Therefore, the people who live near the volcano love and hate the eruption, love it because the ash can provide rich nutrients for crops, and hate it because it often takes people's lives and causes many people to lose their loved ones.

There are many volcanoes in the Heling country, and the local people's feelings for the volcanoes are the same as the feelings of the Chinese people for the Yellow River.

Therefore, there is no doubt that the Tang Dynasty and the Heling Kingdom still have a lot of common language, and the courts and people of the two countries will definitely be able to become very good friends.

At this moment, the huge fleet led by Li An came at the right time, and actually caught up with a volcanic eruption in Heling Kingdom, which made many Tang Dynasty soldiers who had never seen a volcanic eruption in their lives open their eyes.

The huge explosion completely shocked many Tang Dynasty soldiers, after all, the Tang Empire is a stable region, and volcanic eruptions rarely occur, and it is normal for Tang Dynasty soldiers to never see volcanic eruptions.

"Boom ......"

The volcano continued to emit a huge explosion sound, and spewed out fiery red magma, illuminating the entire sea surface, and in addition, the huge vibration made the Tang soldiers who were on the sea deeply feel the violent tremor of the earth in the distance.

"Big brother, what's going on in Heling Kingdom?"

Li Feiyu had never seen a volcano before, nor had he heard of it, and when he saw a powerful volcano, he was immediately frightened, not knowing what he was seeing.

Li An said softly: "It's okay, this is a volcanic eruption, in this place of Heling Country, there are very many volcanoes, and they will erupt from time to time, just like the Yellow River in my Tang Dynasty, doesn't it often burst its embankment?" ”

"Volcanic eruptions? Just like the Yellow River bursting? Brother, I still don't understand, the Yellow River burst its embankment is easy to explain, that is, there is too much river water, and the embankment breaks down and erupts, but what about this volcanic eruption? What's the deal with the red water? ”

Li Feiyu asked with a puzzled expression.

Li An smiled and said softly: "Feiyu, this red liquid is a stone that burns and melts, just like boiling water, and after it boils, it will spew out of the mouth of the pot, do you understand?" ”

For this kind of science, Ang Lee knew that he couldn't explain it according to the actual situation, because Li Feiyu couldn't understand it at all, so it was a good choice to give a more vivid example.

"Big brother, what do you mean, there is a lot of stove at the bottom of the mountain in the distance, which has been burning stones, and when it is boiled, it will erupt, but with such great power, how much firewood is needed to burn and melt so many stones! Why did the people of the Heling Kingdom do this? ”

Li Feiyu was completely stunned, and there was a mistake in understanding.

"What firewood, you think wrong, it's the earth fire, there is a ground fire under the Heling Kingdom, it is the earth fire that melts the underground rocks, and after it boils, it erupts, it's as simple as that."

Li An smiled and spoke.

"Earthfire? Yes, yes, yes, this explanation is much more reasonable, fortunately, I don't have this kind of earth fire in Datang, otherwise it often erupts like this, who can stand it! ”

Li Feiyu expressed a sense of rejoicing.

At this time, all the soldiers of the entire Datang fleet gathered on the deck to watch the volcanic eruption, and even the soldiers who were already asleep were woken up by the loud volcanic activity, and ran to the deck to watch the volcanic eruption curiously.

The Tang soldiers are all curious, they have seen a volcanic eruption for the first time in their lives, so naturally they can't miss such a good opportunity, and they are also talking to each other, discussing with each other what they see, some people are excited, some are frightened, and some even pee their pants.

In order to prevent rumors, Ang Lee immediately sent an order to inform the soldiers of the phenomenon of the eruption, so that everyone was not allowed to speculate and create artificial panic.

"Li Shilang, I have already explained, and I will let all the soldiers know about the volcanic eruption in the shortest possible time, and it will definitely not cause panic."

One of the subordinates said.

Li An nodded and sighed: "The volcano erupted very violently, I don't know how many people will die!" ”

"Li Shilang, there are local people living at the foot of this volcano? Don't they know the danger? ”

A subordinate said.

Li An looked at this person and said, "If this official remembers well, your hometown is next to the Yellow River, how dangerous it is!" Why not get out of there? ”

"Yes, Li Shilang, I understand my humble position, it is difficult to give up my homeland."

Li Ang picked up the binoculars and carefully observed the crater in the distance, and was shocked by the power of the volcano, but also worried about the local people, wondering if these people had fled their homes.

"Li Shilang, I don't know if there is a precursor to this volcanic eruption, if there is no precursor, the people nearby will suffer!"

One of the subordinates said.

Li An thought for a moment and said: "The precursors are natural, volcanoes are similar to earthquakes, before the eruption, there will be some very special precursors, such as the well water will become turbid, the spring water will emit a strange smell, the water level and water temperature of the river will change, and small animals will also behave very abnormally, plants will fade and die, small animals will behave abnormally and die." ”

Thinking of this, Li An couldn't help but start worrying about the local people around the volcano, if these people already knew about this, if they didn't know, they would suffer heavy casualties.

"The local people have lived here for generations, and I believe they must know when the volcano will erupt, and they will be prepared for emergencies."

The subordinate said casually.

Li An nodded and said: "That's right, the local people know a lot about the volcano, and there shouldn't be too many casualties, but the officers and soldiers of our army don't know much about the volcano, and they must be let understand the power of the volcano and how to protect themselves after encountering the volcano." ”

This concern is not unreasonable, now the fleet has arrived in the Heling country, and there are a lot of volcanoes in the Heling country, maybe when it will come, if the Tang army soldiers are not completely accurate, it will be bad.

Li An was worried that after the Tang army landed in the Heling Kingdom, it would suddenly encounter such a volcanic eruption, so he must warn these soldiers and let them know the danger of volcanic eruptions, how to avoid volcanic eruptions, how to protect themselves, and so on.

The ultimate goal of protection is nothing more than to fight against the hot lava and avoid inhaling toxic volcanic gases, these two are the most important, especially in the latter case, which must be paid enough attention, otherwise, you will not know what is going on if you are poisoned by the gas.

If you encounter a volcanic eruption at close range, immediately cover your head with your hands to prevent flying debris from hitting your head, and a helmet is the best option.

After the lava erupts, it will flow from the top to the bottom until it reaches the lowest point or finally cools, and everything in the lava path will be destroyed, but among the various hazards of the volcano, the lava flow is the least life-threatening, because the flow path of the lava is visible, as long as you quickly dodge.

The more dangerous are the hot lava bombs, these bombs are flying around with the eruption of the volcano, once they hit the head of the person, it will cause great damage to people, so when the volcano erupts, you must protect your head and find a reliable position to hide.

The scope of volcanic ash expansion is very large, and even can cover the whole world, after the eruption, the most extensive impact, if the super-large volcano continues to erupt, the huge volcanic ash produced, can even cover the sunlight of the entire earth, so that plants can not receive photosynthesis, wither and die, once the plant dies in a large area, herbivores will also disappear in large quantities, and finally the extinction of animals, and this will be very terrible, once this happens, human civilization will come to an end.

Of course, a volcanic eruption that is large enough to destroy human civilization should not appear under normal circumstances, and an ordinary volcanic eruption will not have much energy, so there is no need to worry about the end of the world.

The area affected by the volcanic ash should be at least a few tens of miles, which will cause a certain degree of harm to the people nearby, making people sick or even dead.

This is because volcanic ash is made up of fine pyroclastic debris, rocks, minerals and fragments of volcanic glass, which is highly irritating and can be accompanied by toxic gases that can cause serious damage to people's lungs, especially children, the elderly and people with respiratory diseases.

Healthy people, on the other hand, have stronger resistance, and as long as they are not too close to the eruption site, the concentration of toxic gases is not enough, and they will not be harmed.

In addition, when the volcano erupts, when it rains, we must pay special attention not to get rain, let alone let the rain enter the eyes, because the volcanic ash contains sulfur and other substances, and when the rain falls, it will form very corrosive sulfuric acid, which may burn people's skin and cause harm to people who are drenched in rain.