The form of volcanic eruption

1908 A. Lacroix According to the volcanic eruption of the way volcanic divided into the following categories:



HI-style (Hawaiian phase) of this volcanic eruptions were a large number of mafic lava flows, the bursting of the activities of smaller outflow of lava from the crater, along the volcanic slopes cracks down slow flow, the formation of volcanic ash. In 1942 at the end of the HI(Mauna Loa) volcanic eruption of such volcanic examples. According to McDonald (GA Macdonald) a description of the eruption of the volcano, is divided into three phases:

Emitting hot lava period: the first phase, a total of continuing a few hours, the formation of thin-layer accumulation of lava flows of lava flows or hilly.

History of red packets even type (Strombolian phase) north of Sicily have Lai Pali Islands, the history of our fire red packets (Strombo-li) for one of the island group of volcanoes; this type of volcanic eruption has not stopped ever since, emitted by the base of the lava flow less acidic substances more debris in the air to form cloud of black smoke due to frequent hot flame smoke, the volcano known as sea lighthouse.

V-type (Vulcanian phase) also volcanic islands, but the way it erupted again and the history of volcanic force Chong package is different from the eruption of the material-rich stickiness Once exposed to air, easy to condenses into solid, so between the two eruptions, emitting lava has condenses into hard-shell, once again when the second eruption of lava cemented shell Chong split into pieces, a large number of volcanic ash with a large number of gas up out in the air the formation of a black cloud cauliflower, this cloud of darkness very easy to darkness, said the cloud of material has not been white-hot, so the lack of light.

Even skin type (Neuees Ardentes) of this type is more violent eruption, the most thick clouds of smoke, the largest eruption of viscous material, a very fine hot ash and thick rock debris, mixed with hot gases, a synthetic milk -like substances, heavy red upward to become white-hot light of the cloud, that is well-known skin Lianyun, also known as the volcanic cloud. Clouds unstable material, adhesive is also large, wait until the accumulation of thicker, the buoyancy?  Luo H continue to support their floating in the air, coupled with the role of gravity, are based on great speed crashed down any biological hit will be the death of .

Lava flooding period: the current population is still coming volcanic lava outflow, so that the lava continued thickening layer and hilly.

Jet period: the current volcano has become a spent force, only the gas appears, quantity also slowed down sharply.