Recently, Mount Merapi erupted with avalanches of searing gas clouds and lava, forcing concerned national authorities to halt tourism and mining activities.
About Mount Merapi:
- Mount Merapi (Mountain of Fire) is one of the world's most active volcanos located in Indonesia.
- It rises to 9,551 feet and has steep slopes with dense vegetation on its lower flanks.
Why do more volcanoes occur in Indonesia?
- Indonesia is located on the Ring of Fire, a vast area around the Pacific Ocean.
- It consists of over 17,000 islands and islets — and nearly 130 active volcanoes.
- The Ring of Fire also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
- The abundance of volcanoes and earthquakes along the Ring of Fire is caused by the amount of movement of tectonic plates in the area.
- Along much of the Ring of Fire, plates overlap at convergent boundaries called subduction zones. That is, the plate that is underneath is pushed down, or subducted, by the plate above. As rock is subducted, it melts and becomes magma.
- The abundance of magma so near to Earth’s surface gives rise to conditions ripe for volcanic activity.
- A significant exception is a border between the Pacific and North American Plates. This stretch of the Ring of Fire is a transform boundary, where plates move sideways past one another.
- This type of boundary generates a large number of earthquakes as tension in Earth’s crust builds up and is released
Q1) What is Volcano?
.A volcano is an opening in the earth’s crust through which lava, volcanic ash, and gases escape. Beneath a volcano, liquid magma containing dissolved gases rises through cracks in the Earth’s crust. As the magma rises, pressure decreases, allowing the gases to form bubbles