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