Science
Volcanoes of the World Quiz
Krakatoa, Yellowstone, and Olympus Mons — from Earth's most explosive eruptions to alien volcanoes.
Krakatoa, Yellowstone, and Olympus Mons — from Earth's most explosive eruptions to alien volcanoes.
There are roughly 1,350 potentially active volcanoes on Earth, and about 50 erupt each year. From the catastrophic eruption of Vesuvius that buried Pompeii in 79 AD to the towering Olympus Mons on Mars — the largest volcano in the solar system — this quiz explores the fiery forces that shape planets and create new land.
Each round presents 10 randomized questions from a pool of 50, with four multiple-choice options and instant feedback after every answer. Your final score comes with a performance tier and shareable results.
You'll explore volcano types from shield to stratovolcano, famous eruptions throughout history, supervolcanoes like Yellowstone, volcanic products such as lava and pyroclastic flows, and even volcanoes on other planets. Did you know that the 1883 eruption of Krakatoa produced the loudest sound in recorded history, heard nearly 3,000 miles away?
Several volcanoes compete for this title depending on the criteria. Mount Vesuvius in Italy is often considered the most dangerous because nearly 3 million people live in its immediate vicinity. Other extremely dangerous volcanoes include Mount Merapi in Indonesia, which erupts frequently, and Mount Rainier in Washington state, which threatens major population centers with potential lahars (volcanic mudflows).
While Yellowstone sits atop a massive magma chamber and has produced three supereruptions in the past 2.1 million years, scientists at the USGS estimate the annual probability of a catastrophic eruption at roughly 1 in 730,000. The idea that Yellowstone is "overdue" is a myth — volcanoes don't follow predictable schedules. A hydrothermal explosion or lava flow is far more likely than a full supereruption.
In recorded human history, the 1815 eruption of Mount Tambora in Indonesia was the largest, rated VEI 7. It ejected roughly 160 cubic kilometers of material and caused the "Year Without a Summer" in 1816, with global temperatures dropping and widespread crop failures. In prehistoric times, the Toba supereruption about 74,000 years ago was even larger, rated VEI 8, and may have caused a volcanic winter lasting years.
Last updated: March 2026