How fast does magma move?



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    Once magma hits the Earth’s surface it becomes known as lava and can travel at speeds from only a few inches per day to speeds up to 15 miles per hour. The speed of lava depends on its composition, the gradient of the land it is traveling over and whether it is confined to a tunnel or spread out over a large area. Though the damage caused by lava flow is permanent, it is also often easy to escape. When lava flows combine with mud, debris and water, they can become more fast moving and dangerous lahars, which can flow at speeds of over 50 miles per hour.

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