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Volcanoes
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Pompeii

Why did Pompeii's volcano errupt?

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October 19, 2012 8:27PM

Originally Vesuvius had a classic cone shape but between 1500 and 3800 years ago there were a series of very violent eruptions causing the summit of the mountain to collapse. Around 1800-100BC more eruptiosn caused a new cone inside the crater (caldera) to form, this acted as a plug made of a thick layer of lava that hardened. The pressure began to build and build underneath causing a series of earthquakes from AD62 to AD79 when the pressure finally caused the erruption. Due to the legnth of time it had been inactive the erruption was extremly violent.
Mount Vesuvius erupted and destroyed Pompeii in AD 79.