Andaman Sea Volcanic activity
To the east of the main Great Andaman island group, is Barren Island. Barren Island is the only presently active volcano associated with the Indian subcontinent. This island-volcano is  in diameter and rises 354 meters above the seal level. Its recent activity started again in 1991 after a quiet period of almost 200 years. The volcanic island of Narcondam which is further to the north.