A planet chosen by the ancients for its huge super-volcano, the Ancients long ago, built a base on the planet, using geothermal energy from the magma chambers beneath the base to power the shields of the Ancient base. However, with continuous use of the shields, at full power the pressure beneath the surface started to build leading to quakes. The Atlantis expedition soon found that the quakes were just the beginning and the previously inactive super-volcano was about to erupt, taking most of the continent with it, and making the planet uninhabitable. When they tried to relocate the inhabitants, the planets only Stargate fell into the magma below, forcing the Taranians to escape via ship as the planet's super-volcano exploded.
 Key Episodes
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