What exactly is a volcanic eruption going on, and what causes it?

A volcano is not a mountain that spews out "fire", it spews out a high-temperature, viscous substance called magma. When the volcano erupts, the scene is spectacular. Normally, magma is wrapped in the earth's crust, and because of its extremely high temperature and the tremendous pressure of the earth's crust, the magma rushes out of the ground violently when it encounters a thin place or a crack in the earth's crust.

When the volcano erupted, accompanied by an earth-shattering roar, the stones flew and rolled, and the blazing magma gushed out from the ground like an incomparable fire dragon, devouring everything around, and in an instant, dozens of miles were shrouded in a thick smoke and fog. Sometimes, volcanic eruptions can cause a high mountain to rise in an instant, as was the case with Mount Kilimanjaro and Mount Cotoppakshi near the equator; Sometimes, it can swallow entire villages and towns in an instant.

Volcanoes are formed beneath the surface, and the deeper they go, the hotter they get, about 20 miles deeper, and hot enough to melt most of the rock. When the rock melts, it expands and requires more and more space. The material melted by the high temperature then rises along the cracks caused by the uplift.

When the pressure in the lava trough is greater than the pressure of the rock above it, it erupts outwards to form a volcano.

It is a peculiar geological phenomenon, a manifestation of the movement of the earth's crust and one of the most intense manifestations of the earth's internal thermal energy on the surface. It is the release of ejecta such as magma from a crater to the surface in a short period of time. Because the magma contains a large amount of volatiles, coupled with the confining pressure of the overlying rock layer, these volatiles are dissolved in the magma and cannot overflow, when the magma rises close to the surface, the pressure decreases, and the volatiles are released sharply, so that a volcanic eruption is formed.

If you ask the experts, this should already be decided.

The causes of volcanic eruptions are as follows:

1. Volcanic eruptions are a phenomenon of nature like **, which is magical, beautiful and spectacular. Volcanoes can be divided into active, extinct, and dormant volcanoes.

2. Due to the mutual friction and collision between plates, local high temperatures are formed, which leads to the melting of rocks and the formation of magma sacs, triggering volcanic activity.

3. There is also a large amount of hot magma in the interior of the earth, and under the action of great pressure, some weak parts of the earth's crust will not be able to withstand the activity of magma gushing out, causing volcanic eruptions.

4. The disasters caused by volcanic eruptions are also very huge, which will destroy a large amount of land, animals and plants, etc., but the volcanic ash brought by volcanic eruptions is an excellent natural fertilizer, which is conducive to the growth of plants.

How is a volcanic eruption caused? It turns out that the Earth's interior is filled with red-hot magma. Under extreme pressure, magma can break through the earth's crust from weak spots and erupt, causing volcanic eruptions.

Volcanoes can be divided into active, extinct and dormant volcanoes. The volcanoes on Mount Tambora and the Hawaiian Islands, which we mentioned earlier, are still active, and they are active volcanoes. An extinct volcano is a volcano that has been active in prehistory, but there is no record of eruption in history.

Most of the more than 600 volcanoes in China are extinct volcanoes. Some volcanoes have been active in history but have not been active since, and such volcanoes are called dormant volcanoes. A dormant volcano may suddenly "wake up" and become an active volcano.

Violent volcanic eruptions can swallow and destroy vast swathes of land and burn large numbers of lives and property to ashes. Surprisingly, however, volcanoes are often found in densely populated areas, as is the case around Mount Nasu and Mount Fuji in Japan. It turns out that the volcanic ash emitted by the volcano is a good natural fertilizer, and the mulberry trees in the Mt. Fuji area grow particularly well, which is conducive to sericulture. The Vesuvius region is rich in grapes.

Volcanic areas have a peculiar scene and often become a tourist attraction.

Until human activity can be controlled, enhanced forecasting is the only way to prevent volcanic disasters. Scientists' research on volcanic eruptions often results from some sudden change in animals and plants. Many animals often flee before volcanic eruptions, as if an intellectual catastrophe is imminent.

On the Indonesian island of Java, there is a peculiar plant that blooms before a volcano erupts, and local residents call it the "volcanic alarm flower".

Volcanic eruption is a peculiar geological phenomenon that is a manifestation of the movement of the earth's crust and one of the most intense manifestations of the earth's internal thermal energy on the surface. It is the release of ejecta such as magma from a crater to the surface in a short period of time. Due to the large amount of volatiles contained in the magma, coupled with the confining pressure of the overlying rock layer, these volatiles are dissolved in the magma and cannot overflow, when the magma rises close to the surface, the pressure decreases, and the volatiles are released sharply, thus forming a volcanic eruption.

Volcanic eruptions.

A volcanic eruption is a phenomenon when magma in the earth's crust rushes out of the ground. The temperature inside the earth is high, and the rocks exist in the form of liquids, which are called magma. Usually, the pressure under the ground is very high, and the magma is tightly held by the earth's crust, and it is not easy to rush out of the ground, but in the more fragile place where the earth's crust is combined, the pressure under the ground is smaller than that of the surroundings, and the gas and water in the magma may be separated, strengthening the activity of the magma, pushing the magma out of the ground, and when the magma rushes out of the ground, the gas and water vapor in the speech are quickly separated, and the volume expands sharply, and the volcanic eruption occurs.

Why did Guo Desheng completely crack the cause?

According to the knowledge of geography, lake sediment forms marshland, marshland continues to evolve into land, this is the content of geographical knowledge imparted, if you continue to study deeply, the land formed is in the interior of the lake basin, this land has the same geomorphological structure as the connotation and extension of the basin, then, that is to say, lake sediment can form a basin, this discovery, completely make up for the worldwide gap in the history of earth science, all the mysteries of geology, are because of the "lake sediment can form a basin" This point of view conceals that any research scholar understands this gap, and almost all professional scholars can easily understand the mysteries and other mysteries of geoscience. It's not because I have superhuman intelligence, it's just that I made a chance discovery and discovered a huge "gap" in the field of basic knowledge of earth science, and this discovery completely opened the door to earth science and was unstoppable.

A very simple logical thinking, if I don't discover the mystery of **, there is no way to find that there is a huge gap in the basic knowledge of geoscience.

Volcanic ash, a geomorphological term, is a unique geological environment, it is a manifestation of plate movements, and it is also the strongest way to indicate the earth's nuclear energy on the ground. It is a short-term gushing of magma from a volcano that erupts to the ground. Because there are a lot of volatile organic compounds in the magma, coupled with the confining pressure of the overlying rock, this volatile organic compounds cannot be dissolved and overflow in the magma, when the magma rises close to the ground, the working pressure is reduced, and the volatiles will be released significantly, and then volcanic eruptions will be generated.

Volcanic eruptions produce volcanic ash.

In the downburst zone, the most lethal and magnificent volcanic eruptions often occur. It is very likely that the volcano here will erupt again after hundreds of years of silence, and if it does, it will be extremely lethal. These eruptions are usually devastating.

And its harm hasHarm global climate change

A lot of volcanic ash and volcanic gases are very harmful to the climate. Because in such conditions, the daylight is gray, stormy, and even muddy, which can confuse local residents for many months. Volcanic dust and volcanic gases are ejected high and then dispersed with the wind.

Volcanic ash obscured the sun's rays, causing the temperature to drop. In addition, they filter out light of special wavelengths, making the sun's rays and the moon appear to be obscured by a halo or contain strange colors, especially at sunrise and sunset, creating unique natural scenery.

Harm to the environment

The volcanic eruption of volcanic ash and landslides from heavy rainstorms have washed down roads, roads and bridges, engulfed surrounding villages and large cities, and left thousands of people sleeping on the streets. The fine sand produced by clods and gravel can engulf entire large cities like a flood. Despite being covered in ash clouds, when the volcano erupts, you can still see large rocks erupting into the air.

The cause of volcanic eruptions is the eruption of a volcano, in other words, a volcanic eruption is essentially a gas-driven eruption: the melted gas in the liquid state is overpressurized, and the gas nucleation increases (gas dissolves), causing the volume to expand and rise. The magma under the volcano is also rich in gas, and as the magma rises, the gas in the magma slowly precipitates, and the bubbles continue to increase.

When a volcano erupts, the walls of the foam crack and the bubbles crack open (called cracking).

Because the temperature and relative density of the Earth's core are uneven, thermal convection within the Earth's core creates a core column. Chemicals with higher temperatures rise to the surface of the ground and produce a portion of the melt as the operating pressure decreases. This molten chemical material clumps together under the action of external forces, creating a layer of magma on the Earth's atmosphere.

If the working pressure of the magma sac exceeds the working pressure of the geological structure, the magma will break through the surface along the faults or defects, causing volcanic eruptions.

Another type of volcano is caused by the interaction of the blocks, such as the downburst zone or impact zone in the block, and the de-drying of some water-containing minerals also reduces the melting point of the rock layer, which will also produce magma sacs, which will lead to mountain-themed activities.

This is the consequences and causes of volcanic eruptions, what other questions do you have?

It can endanger our living environment, and it is very dangerous and very powerful. There may be some harmful gases spewed out, and there will be some sulfur dioxide in it, which will affect people's health. Because there is a lot of magma in it, it will volatilize a lot, and it may be that the temperature or density is uneven, or it may be that the plates interact with each other, so it will lead to volcanic eruptions.

If a volcano erupts, thousands of kilometers around it will be affected, because when a volcano erupts, it will be accompanied by magma eruptions, volcanic ash eruptions, and strong tremors, and the volcanic ash will continue for a long time, causing great damage to local crops, animals, and people. Volcanoes erupt because of changes in geological activity.

The consequences are more serious, and the magma in the process of eruption, the surface temperature is relatively high, and it will also flood other buildings around, and it will also affect the life danger of the surrounding people.

Volcanic eruptions can have a huge impact on the climate, and they can also damage the environment and cause a lot of harm to people. Volcanic eruptions are a peculiar geological phenomenon that is due to a form of crustal movement.

Volcanic eruptions can cause damage to the surrounding environment, mainly because there are too many dissolved gases in the liquid, causing the volume to expand and rise, and the pressure of the magma sac is greater than the pressure of the formation.

Volcanic eruptions are caused by uneven temperature and density in the Earth's interior, 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.

2. Due to the uneven temperature and density of the earth's interior, groundburst convection or slow column is formed inside the earth's grip. When a hot substance rises to the shallow part of the earth, partial melting occurs due to a decrease in pressure. As a result, 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.

3. Due to the interaction of plates, such as in the subduction zone or collision zone of the plate, due to the friction to form a local high temperature, the dehydration of some water-bearing minerals also reduces the melting point of the rock, and then the magma sac will also be formed between the plates, which triggers volcanic activity.