What Is Volcanic Eruption
An eruption means outburst of the solids, liquids and gases on the surface of the earth for volcanic activity. Volcanic eruption means a sudden shatter of the crust of the earth and it begins when the magma chambers pressure forces the magma towards the volcano’s vent and come on the earth surface.
Now when the magma comes on the earth’s surface then it is called lava and when it started flowing is called the lava flow. But during volcanic eruption many types of gases and molten rock and many more comes out from the volcanic vent.
Types of volcanic eruption
There are numerous types of volcanic eruption. Like:
- Lava domes- this type of volcanoes’ are very explosive and violent in nature. Normally they come into shape for high viscosity lava eruption. But they are very sticky in nature therefore they usually don’t travel much distance from the volcano vent.
- Shield volcanoes- they are not explosive in nature. They usually come into shape for low viscosity lava eruption. They normally travel long distance but in low velocity.
- Strato volcanoes-this type of volcano are very hazardous in nature. An example of this type of volcano is Mt. Fuji in Japan. These types of volcanoes are also known as composite volcano.
- Super volcanoes- it is normally large in size. They produce large amount of lava at the time of eruption. At the time of eruption of this type of volcanoes they eject large amount of ash and sulfur clouds. Therefore surrounding areas of that volcano face extreme cooling condition. An example of this type of volcano is Lake Taupo of New Zealand.
- Submarine volcanoes-normally this type of volcano presents at the bed of the ocean. They located at the lower most part of the earth. When this type of volcano erupts then it produce bubbles over the sea bed so you can observe from the top of the sea surface and also when this type of volcano erupts then it discolor that portion of the sea water because it release gases at that time.
Different types of volcano upon their activities-
On the basis of volcanoes activity they can be classified as:
- Dormant – The volcanoes which have not erupted in recent times those are called dormant volcanoes.
- Active volcano – The volcano which regularly erupts is known as active volcano.
- Extinct volcano – Volcanoes which have no record of previous eruption and also it continue in the recent time is known as extinct volcano.
Volcano eruption’s effect-
There are various effects of volcano eruption on the society and the environment. When a volcano erupts normally it ejects water vapors, gases, HF, SO2, HCL along with molten rocks and ashes. Now the emission of the sulfur gives a destructive affect on the ozone layer and responsible of earth’s global warming.