Les 15 questions du quiz
Question 1 : Which volcano destroyed the city of Pompeii in 79 AD?
Réponses possibles :
- Mount Vesuvius
- Vulcano
- Stromboli
- Mount Etna
Explication : Mount Vesuvius, located near Naples in Italy, buried Pompeii and Herculaneum under a rain of ash and pumice.
Question 2 : What is the largest active volcano in the world by volume?
Réponses possibles :
- Mount Fuji
- Mauna Loa
- Piton de la Fournaise
- Mount Kilimanjaro
Explication : Mauna Loa in Hawaii is the largest active volcano, with a volume of about 75,000 km³ and an altitude of 4,169 m.
Question 3 : Which volcano's eruption in 1883 was heard over 4,000 km away?
Réponses possibles :
- Mount Pinatubo
- Mount Tambora
- Mount St. Helens
- Krakatoa
Explication : The eruption of Krakatoa in Indonesia was so powerful that the sound was heard as far as Australia. It caused more than 36,000 deaths.
Question 4 : What is the name of the volcanic zone that surrounds the Pacific Ocean?
Réponses possibles :
- The Magmatic Ring
- The Ring of Fire
- The Lava Circle
- The Volcanic Arc
Explication : The Pacific Ring of Fire contains more than 450 volcanoes, representing 75% of the world's active volcanoes.
Question 5 : Which Icelandic volcano paralyzed European air traffic in 2010?
Réponses possibles :
- Hekla
- Grímsvötn
- Eyjafjallajökull
- Katla
Explication : Eyjafjallajökull disrupted air traffic for several weeks, its ash cloud forcing the cancellation of thousands of flights.
Question 6 : What is the altitude of Mount Fuji, Japan's highest peak?
Réponses possibles :
- 3 542 mètres
- 3 776 mètres
- 4 102 mètres
- 4 478 mètres
Explication : Mount Fuji stands at 3,776 meters. This stratovolcano is a sacred symbol of Japan and a UNESCO World Heritage Site.
Question 7 : What is magma called once it reaches the surface?
Réponses possibles :
- Basite
- Pyroclast
- Lava
- Obsidian
Explication : Magma becomes lava when it exits the volcano. The term "magma" refers to molten rock beneath the Earth's surface.
Question 8 : On which French island is the Piton de la Fournaise located?
Réponses possibles :
- Martinique
- Réunion
- Guadeloupe
- Mayotte
Explication : Piton de la Fournaise is located on Réunion Island. It is one of the most active volcanoes in the world with frequent eruptions.
Question 9 : What is the name of the large circular depression formed after a volcano collapses?
Réponses possibles :
- A chimney
- A caldera
- A dome
- A crater
Explication : A caldera forms when the magma chamber empties during an eruption, causing the summit to collapse.
Question 10 : What is the most active volcano in Europe?
Réponses possibles :
- Stromboli
- Mount Vesuvius
- Mount Etna
- Mount Teide
Explication : Mount Etna, located in Sicily (Italy), is the largest and most active volcano in Europe, with almost continuous activity since antiquity.
Question 11 : In what year did the famous Mount St. Helens eruption occur in the United States?
Réponses possibles :
- 1975
- 1980
- 1986
- 1991
Explication : The eruption of May 18, 1980 was cataclysmic: the north flank collapsed, creating the largest debris avalanche in recorded history.
Question 12 : What type of volcano has a typical cone shape formed by alternating lava flows and ash deposits?
Réponses possibles :
- Volcan bouclier
- Volcan fissural
- Stratovolcan
- Cône de scories
Explication : Stratovolcanoes (or composite volcanoes) are the most dangerous. Examples: Vesuvius, Fuji, Pinatubo.
Question 13 : Which American national park contains a supervolcano whose last major eruption occurred 640,000 years ago?
Réponses possibles :
- Glacier
- Yosemite
- Grand Canyon
- Yellowstone
Explication : Yellowstone has a caldera measuring 55 x 72 km. A future eruption could have planetary consequences.
Question 14 : Which eruption in 1815 caused "the year without a summer" in 1816?
Réponses possibles :
- Santorini
- Mount Vesuvius
- Krakatoa
- Mount Tambora
Explication : The eruption of Tambora in Indonesia was the most powerful in modern history, ejecting ash that darkened skies worldwide.
Question 15 : Which Hawaiian volcano has been in near-continuous eruption since 1983?
Réponses possibles :
- Kilauea
- Mauna Kea
- Hualalai
- Mauna Loa
Explication : Kilauea is one of the most active volcanoes in the world. Its 2018 eruption destroyed more than 700 homes.




