From UPSC perspective, the following things are important :
Prelims level : Mt Sinabung
Mains level : Pacific ring of fire
Indonesia’s Mount Sinabung volcano sent a cloud of hot ash as high as 3 km today, in its first big eruption since August last year.
- It is a Pleistocene-to-Holocene stratovolcano in the Karo plateau of Karo Regency, North Sumatra, Indonesia.
- It is created by the subduction of the Indo-Australian Plate under the Eurasian Plate.
- It erupted in 2010 after a 400-year-long hiatus and has been continuously active since September 2013.
Why frequent eruptions?
- Indonesia straddles the “Pacific ring of fire” with nearly130 active volcanoes, more than any other country.
- Sinabung had been inactive for centuries before it erupted again in 2010.
Try this PYQ:
Q.Consider the following statements:
- The Barren Island volcano is an active volcano located in the Indian Territory.
- Barren Island lies about 140 km east of Great Nicobar
- The last time the Barren Island volcano erupted was in 1991 and it has remained inactive since then.
Which of the statements given above is/are correct? (CSP 2018)
(a) 1 only
(b) 2 and 3 only
(c) 3 only
(d) 1 and 3
What is the Pacific ring of fire?
- The Pacific Ring of Fire is a region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur.
- It includes the Pacific coasts of South America, North America and Kamchatka, and some islands in the western Pacific Ocean.
- It is a direct result of plate tectonics: specifically the movement, collision and destruction of lithospheric plates under and around the Pacific Ocean.
- The collisions have created a nearly continuous series of subduction zones, where volcanoes are created and earthquakes occur.