Olympus Mons is the largest volcano in the solar system, but it is not active.
The largest active volcano is Mauna Loa in Hawaii.
Olympus Mons on Mars
If you mean "volcano", it's Mars. However, the volcano, Olympus Mons, is probably not active nowadays.
it is the first volcano in history to be dormant, extinct, and active combined.
Olympus Mons, on the planet Mars, is the Solar System's tallest (known) mountain and volcano. It is three times higher than Mount Everest.
It was thought to be mars's Olympus Mons that held title for the largest volcano in the solar system however new evidence points that it might actually be on earth. The volcano is called Tamu Massif and sits in the Pacific Ocean it is said to be a whopping 400 miles wide and the magma chamber extends over 1,200 miles into the earth!
The world's largest active volcano is the Mauna Loa in Hawaii.Mauna Loa in Hawaii.
The tallest volcano yet discovered by humans is in our solar system on Mars. It is called Mt. Olympus (Olympus Mons). It is 373 miles (600km) across and 18 miles (29km) tall. It is 3 times taller than Mt. Everest (the tallest mountain on Earth).When the whole Universe has been explored, then it will be possible to answer this question.The tallest volcano in our Solar System is Olympus Mons on Mars.
Mount Etna is the largest active volcano in Europe
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Such a volcano is said to be active.
All of the terrestrial planets (Mercury, Venus, Earth and Mars) had volcanic activity at some time. Only the Earth has active volcanoes now. Mars has the largest volcano in the solar system at over 16 miles high - three times the height of Everest (Now extinct). IO, a moon of Jupiter is known to be volcanically active with over 400 volcanoes.
I think such any devastating volcano is not present