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Test your knowledge of the world's most devastating volcanic events with our comprehensive free 95-question trivia quiz with answers. From Mount Vesuvius to Mount St. Helens, explore fascinating facts about volcano disasters that shaped our planet. See how many questions you can answer correctly and discover what you know about these powerful natural phenomena.
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Q 01In what year did Mount Vesuvius bury the Roman cities of Pompeii and Herculaneum under ash?
79 AD
Vesuvius erupted in 79 AD and sealed Pompeii and Herculaneum under ash and pumice, which is why the two Roman cities survived so well for centuries.
Q 02Which 1883 volcanic eruption produced the loudest sound ever recorded, heard thousands of miles away?
Krakatoa
The 1883 eruption of Krakatoa in Indonesia generated an immense sound wave, estimated to be 310 dB, which reportedly traveled around the world multiple times and was heard as far as 3,000 miles away.
Q 03Which Washington state volcano erupted in 1980 with a massive lateral blast?
Mount St. Helens
Mount St. Helens' 1980 eruption was unique for its lateral blast, triggered by a landslide that uncorked the mountain, sending debris sideways before a vertical eruption column formed.
Q 04What global climate event was largely attributed to the 1815 eruption of Mount Tambora?
The Year Without a Summer
The immense amount of ash and aerosols injected into the atmosphere by the 1815 Tambora eruption caused global temperatures to drop, leading to widespread crop failures and the 'Year Without a Summer' in 1816.
Q 05Mudflows from which Colombian volcano buried the town of Armero in November 1985?
Nevado del Ruiz
Nevado del Ruiz's 13 November 1985 eruption melted summit ice, sending lahars down river valleys into Armero, a town hazard maps had already marked at risk; more than 20,000 of its 29,000 residents died.
Q 06What temporary effect did Mount Pinatubo's 1991 eruption have on the planet's climate?
Global cooling
Mount Pinatubo's 1991 eruption injected a large amount of gas into the stratosphere, which converted into sulfate aerosols and reflected sunlight, causing a temporary global cooling of about 0.5 °C.
Q 07The c.1600 BC eruption of Thera buried Akrotiri, a settlement of which Bronze Age civilization?
Minoan
Akrotiri was a Minoan settlement on Thera (Santorini); its ash-preserved frescoes and multi-storey houses earned it the name the Aegean Pompeii, and the Minoan heartland lay on Crete.
Q 08What is the fast-moving current of hot gas and volcanic debris that races along the ground from an erupting volcano called?
Pyroclastic flow
A pyroclastic flow can reach temperatures of up to 1,000 °C; these ground-hugging currents are what destroyed Pompeii and Saint-Pierre.
Q 09What is the collective term for all fragmented material ejected in an explosive volcanic eruption?
Tephra
Tephra is a general term encompassing all airborne volcanic fragments, from fine ash to large blocks, ejected during an explosive eruption.
Q 10Which light-colored, highly porous volcanic rock often floats on water?
Pumice
Pumice forms during explosive eruptions when super-heated, gas-rich magma cools rapidly, trapping gas bubbles and resulting in a very light, porous rock that can float on water.
Q 11Which eruption type produces the most explosive, sustained ash columns, reaching tens of kilometres high?
Plinian
Plinian eruptions are highly explosive and produce towering eruption columns, named after Pliny the Younger, who described the 79 AD eruption of Vesuvius.
Q 12In 1902 the city of Saint-Pierre on Martinique was wiped out within minutes by which volcano?
Mount Pelée
Mount Pelée's 8 May 1902 pyroclastic surge swept through Saint-Pierre, killing about 28,000 people; one of the few survivors, prisoner Ludger Sylbaris, was shielded by his thick-walled cell.
Q 13What chronic lung disease is the main long-term concern from inhaling fine volcanic ash?
Silicosis
Q 21Which active volcano southeast of Mexico City, nicknamed 'Don Goyo', frequently emits steam and ash?
Popocatépetl
Popocatépetl, 'smoking mountain' in Nahuatl, is Mexico's second-highest peak and has erupted repeatedly since reawakening in December 1994; locals nicknamed it Don Goyo after Saint Gregory.
Q 22What are large, angular fragments of solid rock ejected in an explosive volcanic eruption called?
Blocks
Volcanic blocks are rock fragments larger than 64 mm in diameter that are ejected as solid pieces during an eruption.
Q 23Katia and Maurice Krafft were killed in a 1991 eruption of which Japanese volcano?
Mount Unzen
Acute symptoms like bronchitis are common after ashfall, but long-term exposure to fine volcanic ash, especially ash high in crystalline silica, raises concern about silicosis, a chronic lung disease.
Q 14What is the name for a linear volcanic vent, metres wide but kilometres long, that pours out lava with little explosion?
Fissure
Iceland's Laki craters and Kīlauea's East Rift Zone are classic examples; the flows can feed vast flood basalts before activity focuses on a few spatter cones.
Q 15The 1783 Laki eruption, which caused widespread famine and climate impacts, occurred in which country?
Iceland
The Laki eruption in Iceland in 1783-1784 was a massive fissure eruption that released enormous amounts of sulfur dioxide, leading to a 'fog famine' in Iceland and significant climate disturbances across Europe and North America.
Q 16What basin-shaped depression forms when a magma chamber's roof collapses after an eruption?
Caldera
A caldera is a large, cauldron-like hollow that forms when the ground collapses inward following a powerful volcanic eruption, often after the magma chamber below has been largely emptied.
Q 17The 'Ring of Fire', a zone of frequent earthquakes and eruptions, encircles which ocean?
Pacific Ocean
The Pacific Ring of Fire is a major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur, home to over 75% of the world's active and dormant volcanoes.
Q 18What volcanic type has a broad, gently sloping cone built from fluid basaltic lava?
Shield volcano
Shield volcanoes are typically very large and have gentle slopes, formed by highly fluid, low-viscosity lava flows that spread out over great distances.
Q 19Which Tanzanian volcano is the only one known to erupt cool, white-weathering natrocarbonatite lava?
Ol Doinyo Lengai
Ol Doinyo Lengai's natrocarbonatite lava emerges at only about 540–590 °C, roughly half the temperature of basalt, barely glows, and weathers white within days.
Q 20A release of which gas from Cameroon's Lake Nyos suffocated over 1,700 people in 1986?
Carbon dioxide
The Lake Nyos disaster was a limnic eruption, where a sudden overturn of deep lake water released a massive cloud of carbon dioxide, which flowed down the valleys and caused widespread asphyxiation.
Mount Unzen's 3 June 1991 pyroclastic flow killed 43 people, including the Kraffts and American volcanologist Harry Glicken; the Kraffts' footage later became the basis of the documentary Fire of Love.
Q 24In 1982 a BA 747 lost all four engines in the ash cloud of which Indonesian volcano?
Galunggung
British Airways Flight 9 flew into Galunggung's ash cloud on 24 June 1982; the crew glided the 747 from 37,000 to about 13,500 feet before the engines restarted, and Captain Eric Moody's 'small problem' announcement became aviation legend.
Q 25What is the name for molten rock that is still underground, before it erupts to the surface?
Magma
Magma is the molten rock found beneath the Earth's surface, which becomes lava once it erupts.
Q 26Which volcanic gas causes acid rain and forms 'vog' (volcanic smog) with atmospheric moisture?
Sulfur dioxide
Sulfur dioxide (SO2) emitted from volcanoes reacts with water and other atmospheric components to form sulfate aerosols, contributing to acid rain and volcanic smog (vog), which can cause respiratory issues.
Q 27In what country would you find Mount Etna, one of the world's most active volcanoes?
Italy
Mount Etna is an active stratovolcano on the east coast of Sicily, Italy, and is one of the most active volcanoes in the world.
Q 28Which Sumatran eruption about 74,000 years ago is believed to have caused a 'volcanic winter'?
Mount Toba
The theory that the resulting volcanic winter squeezed humanity through a genetic bottleneck is now disputed by some researchers, but the caldera it left is the largest volcanic lake on Earth.
Q 29Which branch of geology studies eruptions, magma and lava flows?
Volcanology
Volcanology is the branch of geology concerned with the study of volcanoes, including their formation, activity, and hazards.
Q 30Which volcano's April 2010 ash cloud shut most of Europe's airspace for six days?
Eyjafjallajökull
Eyjafjallajökull's April 2010 eruption sent fine ash across Europe; about 20 countries closed their airspace from 15 to 21 April, stranding some 10 million travellers in the largest air-travel disruption since the Second World War.