Qualla: Barren Island (Andaman Islands)

Barren Island (Andaman Islands): Introduction

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Rohitjahnavi, CC BY-SA 3.0. Somewhere on the slopes of India's only active volcano, a herd of feral goats grazes on thick vegetation fed by two freshwater springs. They are the descendants of animals placed on Barren Island by British sailors from a steamer leaving Port Blair in 1891. When geologists from the Geological Survey of India discovered them during a field expedition, the mystery of their survival on an actively erupting volcanic island baffled the scientific community until the springs were found. The goats are not the strangest thing about Barren Island -- that distinction belongs to the volcano itself, which has been in a state of near-continuous eruption since 2022, sending ash plumes to 8,000 feet and higher while remaining classified at the low end of the Volcanic Explosivity Index.

Image: Rohitjahnavi | CC BY-SA 3.0

Barren Island (Andaman Islands): A Restless Giant

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Geological Survey of India, Public domain. Barren Island's volcanic history reads like a clock that keeps irregular time. The first recorded eruption came in 1787, followed by further activity in 1789, 1795, 1803-04, and 1852. Then silence -- nearly a century and a half of dormancy that lulled observers into treating the ...

Image: Geological Survey of India | Public domain

Barren Island (Andaman Islands): Where Plates Collide

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit F R Mallet, GSI, Public domain. Barren Island exists because of one of Earth's fundamental processes: the Indian Plate diving beneath the Burma Plate in a subduction zone that stretches from Sumatra to Myanmar. The volcano sits along this chain as the only confirmed active member on the Indian subcontinent, a g...

Image: F R Mallet, GSI | Public domain

Barren Island (Andaman Islands): Life on a Volcano

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Arijayprasad, CC BY-SA 4.0. True to its name, Barren Island presents vast stretches of bare landscape around the volcanic rim. But the slopes tell a different story, covered in thick vegetation that supports a small ecosystem against seemingly impossible odds. The 1991 eruption devastated the island's fauna...

Image: Arijayprasad | CC BY-SA 4.0

Barren Island (Andaman Islands): Diving into Fire

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Unknown author, Public domain. While the land above the waterline belongs to the volcano, the waters surrounding Barren Island have earned a reputation as one of the world's premier scuba diving destinations. Crystal-clear visibility reveals an underwater landscape sculpted by volcanic forces: basalt formation...

Image: Unknown author | Public domain