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Axial Seamount Nearing Eruption as Seismic Activity and Inflation Intensify

The underwater volcano off the Oregon coast shows signs of imminent eruption, with seismic rates and seafloor swelling reaching critical levels recorded before previous eruptions.

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Microbes and their waste material stream from this “snowblower” vent on Axial Seamount three months after its eruption in 2011

Overview

  • Axial Seamount, located on the Juan de Fuca Ridge, has inflated over 20 cm, matching pre-eruption levels from its last three eruptions in 1998, 2011, and 2015.
  • Seismic activity has surged to 200–300 earthquakes daily, occasionally spiking to 1,000 during tidal cycles, signaling increased stress on the volcano.
  • Researchers predict an eruption could occur within months to a year, although no direct threat to coastal communities is anticipated due to the volcano's depth and location.
  • Submarine eruptions, unlike terrestrial ones, are less explosive due to water pressure, but can temporarily devastate hydrothermal vent ecosystems, which later exhibit rapid recovery.
  • The Axial Seamount is part of a mid-ocean spreading center responsible for three-quarters of Earth's volcanic activity, offering scientists a unique opportunity to study underwater eruptions in real-time.