Volcano

A volcano is an an opening in a planet's surface, usually mountainous, which allows hot, molten rock, ash and gases to escape from below the surface.

Volcanos on Earth
At an unknown point in history, the Doctor, John and Gillian visited a South Seas island and witnessed a volcanic eruption. (TVC: Guests of King Neptune)

In 79, the Roman city of Pompeii was destroyed the eruption of the volcano Vesuvius. (BFA: The Fires of Vulcan, DW: The Fires of Pompeii)

In 1883, the Doctor witnessed the eruption of the volcano Krakatoa (DW: Inferno). The explosion released at least one captive Xylok to the surface. (SJA: The Lost Boy)

In the 21st century, Salamander triggered volcanic eruptions in Hungary as part of his plan to take control of Earth. (DW: The Enemy of the World)

In 2167, the Daleks' attempt to mine Earth's core instead resulted in a volcanic eruption in Bedfordshire. (DW: The Dalek Invasion of Earth)

Volcanos on Other Worlds
On Dulkis, the Dominators' attempt to turn the planet into starship fuel instead resulted in a volcanic eruption that threatened the Doctor's TARDIS. (DW: The Dominators)

A massive volcano on Mars created the Olympia Mons crater. (NA: Transit)

Planets with high levels of volcanic activity include:


 * Gehenna (BNA: Mean Streets)
 * Krop Tor (DW: The Impossible Planet / The Satan Pit)
 * Sarn (DW: Planet of Fire)
 * Tigus (DW: The Daleks' Master Plan)