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If, however, you mean erupt rather than explode then it's something like:
Magma beneath the volcano comes under very high pressure, which forces it out the volcano, normally through the huge gaping hole at the top. However, very high pressure sometimes means that this hole is not enough, and magma (lava when outside the volcano) will burst out the sides of the volcano, such as the eruption at St. Helens.
I don't know much about science however, I don't know why or how the magma comes under pressure in the first place.
What else can I help you with?
What are volanoes?
volcanoes are mountthat explode lava
Do volcanoes in Hawaii explode anymore?
yes
Does an island composite volcano explode rapidly or slowly?
The phrase "explode slowly" is an oxymoron. Composite volcanoes, regardless of whether they are island volcanoes or mainland volcanoes, will produce both explosive and non-explosive eruptions.
What are the disadvatages of volcanoes?
Um...they explode and kill people...
Does the volcanoes in Spain still explode?
no they dont occur
What term is given to large depressions associated with volcanoes that form when volcanoes explode or collapse in the Earth?
That term is 'calderas'
Do earthquakes explode like volcanoes?
No, earthquakes and volcanoes are different geological events. Earthquakes are caused by the movement of tectonic plates beneath the Earth's surface, while volcanoes erupt due to magma or gas buildup beneath the Earth's crust. While both can cause destruction, earthquakes do not explode like volcanoes.
In what weather conditions does a volcano explode best?
Weather has no effect on the explosive properties of volcanoes.
Why don't Hawaii islands explode?
They do! Check out the Volcanoes State Park at Kilauea on the Big Island. They have volcanoes that have been going for 30 years now.
Why do Japan's volcanoes have steep slopes?
because japans volcanoes explode. So therefore, the magma does not flow down the volcano making it flat and smooth.
Why is it important for us to know about volcanoes?
because if people are not informed about volcanoes they could erupt and explode and kill us all and we wouldnt have any protocol to escape it.
Why do volcanoes explode after years of silence?
in the magma chamber gasses build up. while it is silent its building up theses ezplosive gasses build up and explode.
