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3h ago

Quake Linked to Barren Island’s Minor Eruption as Officials Confirm Two Events in Eight Days

Seismologists attribute the September 20 outburst to a magnitude-4.2 tremor that likely disturbed the volcano’s deep magma chamber.

Representational image. AI-generated
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A video of the eruption was captured by one of the Indian Navy's warships.

Overview

  • Officials reported minor eruptions on September 13 and September 20 at India’s only active volcano, with no immediate risk to nearby populations.
  • National Centre for Seismology director O P Mishra said shaking from a magnitude-4.2 earthquake two days earlier likely triggered the September 20 activity.
  • The mechanism described involves seismic energy disturbing magma reservoirs at roughly 18–20 km depth within a highly active subduction setting.
  • Barren Island is uninhabited, about 140 km from Port Blair, with the nearest inhabited islands—Swaraj Dweep and Narcondam—around 140–150 km away.
  • Video of the September 20 episode circulated on social media, with posts attributing the footage to an Indian Navy patrol, as historical records note prior eruptions in 1787, 1991, 2005, 2017 and 2022.