Who, what, when, where, why, how?
In 1883, Krakatoa Indonesia, a volcano on the Krakatoa island, erupted. Said to be one of the loudest sounds heard up to 3,000 miles away, and killing nearly 36,417 people, this is one of the worst natural disasters to date.
The indonesian region in which this volcano erupted, was a nice big three island area, that had a large civilization on the island of the volcano. Upon eruption, the people had little time to react that even the island 13km away, there were no survivors. The tsunamis that came following the eruption, went as far as to south africa and other places up to 15km away.
Volcanos erupt with little warnings, and can happen almost immediately. Why? Well, because magma is less dense then the surrounding rock, and wants to work its way above it. Water and dissolved gasses are sometimes mixed in the magma, causing a violent eruption because of its expanding into steam and gas. There are usually three main reasons for an eruption or triggering of eruption. One: The buoyancy of the magma, which is easiest to understand by thinking of holding a beach ball underwater, and the rising force is buoyancy. In the very basic of terms. Two: The pressure of the gasses already in the magma, and three; the insertion of new magma into an old set of magma.
Volcanos can be active and not erupt for several years if circumstances all go well, but at the same time, it could erupt and any time and be as catastrophic as ever. A volcano can become inactive when the lava diminishes and stops, or just the plates move away and take the lava with it.
The indonesian region in which this volcano erupted, was a nice big three island area, that had a large civilization on the island of the volcano. Upon eruption, the people had little time to react that even the island 13km away, there were no survivors. The tsunamis that came following the eruption, went as far as to south africa and other places up to 15km away.
Volcanos erupt with little warnings, and can happen almost immediately. Why? Well, because magma is less dense then the surrounding rock, and wants to work its way above it. Water and dissolved gasses are sometimes mixed in the magma, causing a violent eruption because of its expanding into steam and gas. There are usually three main reasons for an eruption or triggering of eruption. One: The buoyancy of the magma, which is easiest to understand by thinking of holding a beach ball underwater, and the rising force is buoyancy. In the very basic of terms. Two: The pressure of the gasses already in the magma, and three; the insertion of new magma into an old set of magma.
Volcanos can be active and not erupt for several years if circumstances all go well, but at the same time, it could erupt and any time and be as catastrophic as ever. A volcano can become inactive when the lava diminishes and stops, or just the plates move away and take the lava with it.