Barren Island Volcano: Location in Andaman Islands

The Barren Island volcano is a significant geographical feature, notable for being India's only confirmed active volcano. It is located in the Andaman Islands archipelago, which lies in the Bay of Bengal.

To understand its precise location, we need a reference point within the Andaman Islands. The question states that Barren Island is approximately 138 km northeast of a specific location.

Identifying the Reference Point: Port Blair

The key administrative and population center in the Andaman Islands is Port Blair. Scientific and geographical sources confirm that Barren Island's position is measured relative to this capital city.

Specifically, the Barren Island volcano is situated roughly 138 km away from Port Blair, in a northeastern direction.

Geographical Context

Let's consider the other options provided:

• Diglipur: This town is located in the northernmost part of North Andaman Island. Barren Island is not typically referenced relative to Diglipur.
• Aberdeen: This name is historically associated with the area now known as Port Blair, but Port Blair is the standard modern reference.
• Ferrargunj: This is a settlement located on South Andaman Island, southeast of Port Blair. It is not the correct reference point for Barren Island.

Therefore, the most accurate geographical reference for the location of the Barren Island volcano is Port Blair.