what is the different types of volcanic eruption?
484007
There are two types of eruptions in terms of activity, explosive eruptions and effusive eruptions. Explosive eruptions are characterized by gas-driven explosions that propels magma and tephra. Effusive eruptions, meanwhile, are characterized by the outpouring of lava without significant explosive eruption.
300973
Lava Flows. The major eruptive product of Hawaiian volcanoes is lava. Lava flows can form during fountaining eruptions or they can well out of the ground with little or no pyroclastic activity. There are two major types of basaltic lava flow, ' a'a and pahoehoe .
1302417
Volcanic eruptions pull materials up from deep within the earth to form various volcanic landforms, such as lava domes, lava plateaus, fissure eruptions, craters and calderas.
35642
All volcanic eruptions start the same, with molten rock (magma) rising up through the Earth and breaking through the Earth's crust. However, this is where the similarities end. The different types of volcano erupt differently.
368499
The main parts of a volcano include the magma chamber, conduits, vents, craters and slopes. There are three types of volcanoes: cinder cones, stratovolcanoes and shield volcanoes.
948269
There are three main types of volcano - composite or strato, shield and dome. Composite volcanoes, sometimes known as strato volcanoes, are steep sided cones formed from layers of ash and [lava] flows. ... When composite volcanoes erupt they are explosive and pose a threat to nearby life and property.
882091
In general, the more felsic the magma the greater the volatile content. So mafic/basaltic volcanoes are fairly quiescent, intermediate/andesitic volcanic eruptions are moderately explosive, and felsic/rhyolitic volcanoes may be extremely explosive.
637625
When magma erupts at the surface it can form different types of volcanoes depending on the viscosity, or stickiness, of the magma, the amount of gas in the magma, and the way in which the magma reached the surface. Different types of volcanoes include stratovolcanoes, shield, fissure vents, spatter cones and calderas.
287385
Explosive volcanism. Part of Hall of Planet Earth. Most explosive eruptions occur in volcanoes above subduction zones, where one tectonic plate dives beneath the other. Eighty to 120 kilometers below the surface, magma forms when the rocks of the mantle melt just above the subducting plate.
339940
Eruptions at shield volcanoes are only explosive if water somehow gets into the vent , otherwise they are characterized by low-explosivity fountaining that forms cinder cones and spatter cones at the vent, however, 90% of the volcano is lava rather than pyroclastic material.
807121
Yellowstone, one of the world's largest active volcanic systems, has produced several giant volcanic eruptions in the past few million years, as well as many smaller eruptions and steam explosions. Although no eruptions of lava or volcanic ash have occurred for many thousands of years, future eruptions are likely.
1352660
Three characteristics of magma that mainly affect the explosiveness of a volcanic eruption include gas content, viscosity, and temperature. ... A magma with higher viscosity means it has a lot of silica. As a result, the more silica a magma contains the thicker and more explosive it is.
909125
['(i) Undersed earthquakes:', '(ii) Landslides:', '(iii) Volcanic Eruptions:', '(iv) Meteorites and Asteroids:']
902530
In general, eruptions can be categorized as either effusive or explosive. Effusive eruptions involve the outpouring of basaltic magma that is relatively low in viscosity and in gas content. Explosive eruptions generally involve magma that is more viscous and has a higher gas content.
976600
Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single vent that have been blown into the air, cooled and fallen around the vent. ... Helens are examples of this type of volcano.
992400
['Acidic lava, which is very viscous (sticky).', "Steep sides as the lava doesn't flow very far before it solidifies.", "Alternate layers of ash and lava. For this reason, they're also known as stratovolcanoes . ... ", 'Violent eruptions.', 'Longer periods between eruptions.']
918235
"Once you get enough melt, you can start an eruption just like that." There are about 20 known supervolcanoes on Earth - including Lake Toba in Indonesia, Lake Taupo in New Zealand, and the somewhat smaller Phlegraean Fields near Naples, Italy. Super-eruptions occur rarely - only once every 100,000 years on average.