When Does Volcanos Erupt?

Answer 1

When pressure from magma attempts to reach the surface, and is blocked by a "plug" of rock and other debris formed from earlier eruptions. The magma contains a lot of gas, so this, too, will add to the pressure on the plug, and eventually the pressure will become so great that it must be "relieved", hence causing an eruption (this is the more explosive type). A lesser type, involving lava eruptions, is when magma reaches the surface through breaks (faults, vents or fissures). There are other types of eruptions, like steam eruptions, or geysers (think of Yellowstone and Old Faithful), that can occur with any volcano. These mini eruptions are a result of water seeping into dormant fissures and making contact with magma below the surface. The water is instantly evaporated by the super-hot magma, and steam rises and shoots out from the open vent.

Answer 2

a volcanoe will erupt when the magma chamber has enough molten rock and metal to create a large anount of pressure it will give warning signs the ground will shake and buldge and smoke will rise after the magma finds its way through the actual mountain or volcano it will have enough pressure to blow into the air with a loud boom when it breaks the surface

Answer 3

whenever magama gets a fissure to break out of the crust and onto the ground...

Answer 4

when it explode!!
or why don't you ask the volcano.
"MR. VOLCANO WHEN WILL YOU ERUPT?"

Answer 5

when the eclipse totalises