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How can volcanoes sometimes have more then one kind of eruption?
Wiki User
∙ 12y ago
Well, the magma reservoir or chamber beneath every volcano gets it's fuel from the Earth's mantle (a layer of seething magma). So every time a volcano erupts, emptying or lowering the level of magma in the chamber, some magma from the mantle will rise (over time) to fill the gap.
Wiki User
∙ 12y ago
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Why do some volcanoes erupt ash and others lava?
The style of the volcanic eruption is very dependent on the amount of dissolved gas that is in the magma (liquid rock below the surface). If there is a high gas content the volcanic eruption will be explosive and create a log of ash. If the gas content is low the eruption produces more lava flows. An example of a high gas content eruption was the last major eruption of Mt. St. Helens in 1980. An example of a low gas content eruption would be the Hawaiian volcanoes.
What is the sheild volcano eruption like?
Shield volcanoes are the more quiescent, lumbering giants of the volcano world. Although these types of volcanoes are not small by any means, the eruptions they produce can be pretty "ho hum" compared to the enormous explosive potential of the Extreme Volcanoes.
Are volcanoes formed by earthquakes?
While earthquakes and volcanoes sometimes go together, a volcano is not formed by an earthquake. It would be more correct to say that the volcano caused the earthquake. One of the signs of an impending volcanic eruption is a series of earthquakes, because the movement of the magma underground often shakes the ground nearby.
Why are continental volcanoes more likely to cause natural disaster?
There are two reasons. First, continental volcanoes are more likely than other volcanoes to be of the stratovolcano type. These volcanoes produce the largest, most explosive eruptions that pose the greatest risk to human lives and property. Second, since they are on the mainland, continental volcanoes are generally more likely to have people living near them. An eruption that occurs on an uninhabited island and does not affect anybody is not generally considered a disaster.
Why are Hawaiians volcanic eruptions less violent?
Compared with some other volcanoes around the world, the Hawaiian volcanoes are fed by low-viscosity magma with a low gas content. The explosive power of a volcanic eruption is driven by gas trapped in the magma, and magma that is more viscous allows more pressure to build up. The magma in the Hawaiian volcanoes flows out fairly readily.
Why can volcanoes sometimes have more than one type of eruption?
sometimes the first eruption causes new side vents to open up. Because of this, the second eruption could be more powerful and deadly-pliniann eruption
Why do some volcanoes erupt ash and others lava?
The style of the volcanic eruption is very dependent on the amount of dissolved gas that is in the magma (liquid rock below the surface). If there is a high gas content the volcanic eruption will be explosive and create a log of ash. If the gas content is low the eruption produces more lava flows. An example of a high gas content eruption was the last major eruption of Mt. St. Helens in 1980. An example of a low gas content eruption would be the Hawaiian volcanoes.
How many vocanoes are on underwater?
There are more then 8,000 underwater volcanoes. America had the most biggest eruption worldwide by 5 metres down by sea.
What is the sheild volcano eruption like?
Shield volcanoes are the more quiescent, lumbering giants of the volcano world. Although these types of volcanoes are not small by any means, the eruptions they produce can be pretty "ho hum" compared to the enormous explosive potential of the Extreme Volcanoes.
Which killed more people volcanoes or tornadoes?
Volcanoes have killed more people by far. A number of volcanic eruptions, such as the 1883 eruption of Krakatoa, have had had tolls in the tens of thousands, while only 1 tornado is known to have killed over 1000 people.
Are volcanoes formed by earthquakes?
While earthquakes and volcanoes sometimes go together, a volcano is not formed by an earthquake. It would be more correct to say that the volcano caused the earthquake. One of the signs of an impending volcanic eruption is a series of earthquakes, because the movement of the magma underground often shakes the ground nearby.
Why are continental volcanoes more likely to cause natural disaster?
There are two reasons. First, continental volcanoes are more likely than other volcanoes to be of the stratovolcano type. These volcanoes produce the largest, most explosive eruptions that pose the greatest risk to human lives and property. Second, since they are on the mainland, continental volcanoes are generally more likely to have people living near them. An eruption that occurs on an uninhabited island and does not affect anybody is not generally considered a disaster.
Why are Hawaiians volcanic eruptions less violent?
Compared with some other volcanoes around the world, the Hawaiian volcanoes are fed by low-viscosity magma with a low gas content. The explosive power of a volcanic eruption is driven by gas trapped in the magma, and magma that is more viscous allows more pressure to build up. The magma in the Hawaiian volcanoes flows out fairly readily.
Does the earths axis the equator and the prime meridian effect the start of the volcanoes erupting?
The Earth's axis is always the same in relation to the Universe. The Sun has a pull on the Earth and may have more of a pull on the magma when the volcano is facing the Sun. The volcano's distance to the equator may make a difference in the rate of eruption and explosiveness of the eruption as there is more centripetal force propelling the magma at the equator than at the pole. The prime meridian really has nothing to do with the erupting of volcanoes except that certain places on Earth are more likely to have faults in the crust, which is the cause of volcanoes.
Why are volcanoes important?
Did you know that when lava cools after the eruption it turns to rock. Turning to rock may fix broken sidewalks and make new roads. It also make the crust a lot more bigger after each eruption. The only thing that is bad to volcanoes is that when the eruption is very powerful it may cause a large earthquake and destroy over a 20 mile radius. People may die of the volcanoes that erupt explosively may cause tsunamis and or other disruptions to land.
What do volcanoes eat?
I think this is a flawed question. Volcanoes don't eat like animals do because volcanoes are not alive. Volcanoes are just holes in the crust through which magma, gases and ash erupt.The Primitive CustomIn the South Seas, before Europeans arrived, islanders tried to appease the "volcano god" with offerings, sometimes including human sacrifices. Because some eruptions are short and infrequent, they might have inferred it was working. The alternative (a full-blown continuing eruption) usually eliminated the residents, so they drew no conclusions at all.
Was Mt Pinatubo the largest volcanic eruption in recent time?
No. Compared with other volcanoes of the same type, Mount Pinatubo is relatively small. Its 1991 eruption was very large, but by no means the largest. The 1815 eruption of Mont Tambora was more than 10 times larger.
