Question 6

how fast can lava flow? In Hawai'i the fastest flows were recorded were those of the 1950 Mauna Loa eruption. These were going about 10 kilometers per hour through thick forest. That was the velocity of the flow front. Once the lava flows became established and good channels developed, the lava in the channels was going at more like 60 km/hour On January 10,1977, a lava lake at Nyiragongo, a stratovolcano in Zaire, drained in less than one hour. The lava erupted from fissures on the flank of the volcano and moved at speeds up to 40 miles per hour (60 km/hr). About 70 people were killed.

Question 5

How hot is lava? When they erupt they are probably around 1170 to 1175 degrees centigrade. That converts to about 2140 degrees farenheit. The lava at other volcanoes, especially strato-volcanoes like Mount St. Helens, is a good deal cooler, perhaps 100-200 centigrade degrees cooler. That is the main reason why it is so viscous compared to the Hawaiian lavas that are so fluid.

Question 4

what causes volcanoes to erupt? Some volcanic eruptions might be triggered by a sudden injection of magma from the mantle upward into the base of a volcano. The injection of new magma might reactivate the existing magma system, and trigger an eruption.

Question 3

some of the worlds active volcanoes are located in Augustine USA Ruapehu New Zealand Costa Rica, Chikurachki Russia Colima México Karymsky, Russia Kilauea, USA Pavlof, USA Rabaul, Papua New Guinea, Semeru Indonesia Shiveluch, Russia St. Helens, USA Tungurahua, Ecuador Ubinas, Perú

updated questions

the same as before but also; Types of volcano's

Question 2

types of volcanoes? there are many different types of volcanoes and these are some I found. Shield volcanoes: A shield volcano is a big volcano with sloping sides. Stratovalcanoes: A stratovolcano is also also known as a composite volcano, is a very tall, conical volcano, it is composed of many layers of lava, tephra, and volcanic ash. Super volcanoes: A supervolcano is a volcano that produces the largest and most voluminous kind of eruptions on Earth. Submarine volcanoes: A Submarine volcanoe is an underwater fissure under the ocean surface from which magma can erupt.Subglacial volcanoes: A subglacial volcano is a volcanic form produced by eruptions beneath the surface of a lake; it melts into a glacier or ice sheet by the rising lava.

Question 1

what are volcanos and how are they formed? A volcano is like a vent, or opening, in the earth's crust where melted rock better known as molten rock called magma is ejected. We also use the word "volcano" to describe the mountain that is built up by the molten rock and ashes. The temperature deep inside the earth is very hot, so hot it will melt rock into a super-really-hot liquid which is called magma. and It also builds up a lot of pressure. the built up pressure pushes the magma, along with gases and steam, which goes up through openings in the earth's crust. Parts of a Volcano scribe the mountain that is built up by the molten rock and ashes.