Science
Volcanoes & Geothermal Wonders Quiz 🌋
Supervolcanoes, geysers, and the molten fury beneath our feet.
Supervolcanoes, geysers, and the molten fury beneath our feet.
The 1883 eruption of Krakatoa produced the loudest sound in recorded history — it was heard 4,800 km away and circled the globe four times. From supervolcanoes capable of plunging Earth into a volcanic winter, to geysers that erupt on schedule and hot springs teeming with heat-loving microbes, the volcanic forces shaping our planet are as awe-inspiring as they are deadly.
Each round presents 10 randomized multiple-choice questions drawn from a pool of 50, so every playthrough is different. You get instant feedback with explanations after each answer, plus a shareable score at the end.
You'll explore the supervolcanoes that reshaped civilizations (Toba's genetic bottleneck, Yellowstone's enormous magma chamber), the most destructive eruptions in history, how geysers and geothermal springs work, the difference between shield and stratovolcanoes, and bizarre phenomena like volcanic lightning and the bizarre colors of Grand Prismatic Spring.
Yes, but it is unlikely in the near future. The annual probability of a Yellowstone supereruption is estimated at about 1 in 730,000. Its last supereruption was roughly 640,000 years ago. Scientists monitor it continuously and say there are no signs of an imminent eruption. If it did erupt, it could blanket much of North America in volcanic ash and cause a global volcanic winter.
The 1883 eruption of Krakatoa in Indonesia produced the loudest sound ever recorded in human history. The explosion was heard 4,800 km away in Rodrigues Island near Mauritius, and the pressure wave from the blast circled the globe at least four times. The eruption killed an estimated 36,000 people, mostly through the resulting tsunamis.
Campi Flegrei (Phlegraean Fields) near Naples, Italy, is widely considered among the most dangerous. It is a supervolcano sitting beneath a densely populated area with around 500,000 people living in the caldera zone. It has been showing signs of unrest (bradyseism — ground inflation) in recent years. Mount Merapi in Indonesia and Popocatepetl in Mexico are also frequently cited as among the world's most hazardous.
Last updated: March 2026