The 15 Largest Volcanic Eruptions in History

The largest eruption in the last 2 million years. Toba’s catastrophic VEI 8 event created Lake Toba — the world’s largest volcanic lake at 100 by 30 kilometers. Ash deposits reached 15 cm thick across the entire Indian subcontinent, and volcanic glass has been found in Greenland ice cores. For decades, the “Toba catastrophe theory” suggested this eruption nearly wiped out humanity, reducing our population to perhaps 10,000 individuals. But 2026 research from Curtis Marean’s team at Arizona State has largely debunked this: archaeological sites in Africa show continuous human occupation through the eruption. Humans didn’t nearly go extinct — they adapted.

The first and largest of Yellowstone’s three caldera-forming super-eruptions. The Huckleberry Ridge Tuff covered much of the western United States in ash and created a caldera roughly 100 km long. This eruption marks the earliest known activity of the Yellowstone hotspot in its current position — though the hotspot itself has been active for at least 16 million years, leaving a trail of older calderas across southern Idaho as the North American Plate drifted southwest over it.

The most recent confirmed VEI 8 eruption on Earth, and the world’s largest known phreatomagmatic eruption — meaning groundwater played a major role in the explosive dynamics. The Oruanui event ejected over 1,170 km³ of material and devastated most of New Zealand’s North Island. The caldera it created now holds Lake Taupo. What makes Taupo especially noteworthy is that it didn’t stop there: its 232 CE eruption, while much smaller, produced pyroclastic flows traveling at 250–300 km/h across 20,000 km² — one of the most violent Holocene eruptions.

The eruption that created the Yellowstone Caldera as we know it today — the 72 by 55 kilometer depression that underlies Yellowstone National Park. The Lava Creek Tuff covers vast areas of the western US, and ash from this eruption has been identified as far east as the Gulf of Mexico. This was Yellowstone’s third and most recent caldera-forming eruption. Beneath the current caldera lies a magma reservoir containing roughly 46,000 km³ of partially molten rock — though only an estimated 5–15% is actually liquid.

The largest eruption in European history, and one that may have helped seal the fate of the Neanderthals. The Campanian Ignimbrite eruption deposited ash across the entire eastern Mediterranean, with layers found in Russia, North Africa, and the Black Sea floor. A 2010 study in Current Anthropology argued the eruption’s volcanic winter — combined with the broader climate cooling of Heinrich Event 4 — pushed already-declining Neanderthal populations past the point of recovery. The caldera it created is now Campi Flegrei, where 1.5 million people live today.

One of Earth’s largest Holocene eruptions and among the least well-known on this list — largely because Kamchatka is one of the most remote volcanic regions on the planet. The eruption created Kurile Lake caldera in southern Kamchatka, depositing ignimbrite sheets across hundreds of square kilometers. In our database, this is one of only a handful of VEI 7 events in the Holocene. Kamchatka’s volcanic arc contains over 160 volcanoes, 29 of them active, making it one of the most volcanically dense regions on Earth.

The eruption that created one of America’s most iconic landscapes: Crater Lake. Mount Mazama, once a ~3,700-meter stratovolcano, collapsed into its emptied magma chamber after ejecting roughly 50 km³ of magma (about 150 km³ as tephra). The resulting caldera filled with rainwater and snowmelt over centuries to create the deepest lake in the United States at 594 meters. Klamath tribal oral histories describe the eruption as a battle between the spirits of the sky and the underworld — one of the oldest geological oral traditions on record.

The largest Holocene eruption in Japan, and one with dire consequences for early Japanese civilization. The Kikai caldera eruption sent pyroclastic flows across the sea surface for over 100 km, devastating southern Kyushu and effectively wiping out the Jōmon culture in the region. Archaeological evidence shows a gap of centuries before the area was resettled. In March 2026, researchers from Kobe University confirmed that Kikai’s submarine caldera is actively recharging with new magma — a finding that has intensified monitoring efforts across Japan’s submarine volcanic arc.

The eruption that destroyed the Minoan civilization on Crete and may have inspired the legend of Atlantis. The Minoan eruption of Thera (modern Santorini) generated tsunamis up to 35 meters high that struck Crete’s northern coast, where the Minoan palace of Knossos stood. Ash deposits have been found across the eastern Mediterranean, and the eruption likely caused short-term climate cooling visible in tree-ring records from Ireland to California. The caldera it created — now partially filled by the Aegean Sea — is one of the most photographed geological features in the world.

The eruption that nobody knew about until 2013. For decades, ice core records showed a massive sulfur spike in 1258/1259 — the largest stratospheric sulfur injection of the Common Era — but nobody could identify the source. French volcanologist Franck Lavigne finally traced it to Mount Samalas, the predecessor of Rinjani’s caldera on Lombok. The eruption released an estimated 158 teragrams of SO₂ into the stratosphere, triggering global cooling that contributed to the Great Famine of 1258 in England and crop failures across Europe. Medieval chronicles describe foggy skies and failed harvests — but never named the cause.

The most powerful eruption in recorded human history. Tambora’s April 1815 event ejected 150 km³ of material, lowered the mountain from 4,300m to 2,850m, and killed roughly 12,000 people directly through pyroclastic flows and ashfall. But the real catastrophe came after: so much sulfur dioxide entered the stratosphere that global temperatures dropped 0.4–0.7°C, producing the infamous “Year Without a Summer” in 1816. Crop failures across the Northern Hemisphere killed an estimated 80,000 through famine and disease. It caused the last great subsistence crisis in the Western world.

The loudest sound in recorded history. Krakatau’s August 27, 1883 eruption was heard 4,800 km away on Rodrigues Island near Mauritius — the equivalent of hearing a sound from New York in Dublin. The explosion generated a pressure wave that circled the globe 3.5 times, recorded on barographs worldwide. When two-thirds of the island collapsed into the emptied magma chamber, it triggered tsunamis up to 41 meters high that killed 36,000 people along the coasts of Java and Sumatra. The eruption also produced vivid red sunsets worldwide for months, which some art historians believe influenced Edvard Munch’s The Scream.

The largest eruption of the 20th century — and it happened where almost nobody was watching. Novarupta’s June 1912 eruption on the Alaska Peninsula ejected 15 km³ of magma in 60 hours, creating the Valley of Ten Thousand Smokes: a 40 km² plain of ash flow deposits up to 210 meters deep. Ash fell on Kodiak Island, 160 km away, for three days straight. Darkness was total. Remarkably, no one died — the area was virtually uninhabited. For decades, nearby Mount Katmai got the blame, but geological detective work in the 1950s proved that the actual vent was Novarupta, 10 km to the west.

The eruption that proved modern volcanology can save lives. When Pinatubo showed signs of unrest in April 1991, USGS and PHIVOLCS scientists correctly predicted a major eruption within weeks. Over 75,000 people were evacuated — including 15,000 US military personnel from Clark Air Base. The June 15 climactic eruption injected 17 megatons of SO₂ into the stratosphere, lowering global temperatures by 0.5°C for two years. Despite the eruption’s power, only 847 people died — mostly from roof collapses under rain-soaked ash during Typhoon Yunya, which struck simultaneously. Without the evacuation, the death toll would have been in the tens of thousands.