Scientists studying the Lava Creek Tuff eruption have found unusual rocks linked to the event 631,000 years ago.
The Aso Volcano has been erupting sporadically for decades, according to the NASA Earth Observatory website.
"We are at the mercy of the volcano. It's the only one who can decide when this ends," Angel Víctor Torres, president of Spain's Canary Islands, said on Sunday.
The Cumbre Vieja volcano on the Spanish island of La Palma has been erupting since September 19, with lava flows causing widespread destruction.
The dramatic photos showcase the devastation left in the wake of 1,100 degress Celsius lava and the toxic fumes created as it hits the ocean.
"It's not over yet, we don't even know how long there is to go. We're in nature's hands," said Canary Islands' regional president Ángel Víctor Torres.
The volcano started erupting on Wednesday, releasing tens of thousands of tons of hazardous volcanic gas.
The La Palma volcano has seen rivers of lava spewing from its mouth, with temperatures soaring to 1,000C as its plume soars more than two miles into the sky.
The flowing molten rock has destroyed homes and forced thousands to evacuate after the Cumbre Vieja volcano erupted.
Authorities plan to ask the European Union for disaster relief to help rebuild roads, waterways and homes destroyed by the flow.
The eruption of the Cumbre Vieja volcano came after seismologists recorded more than 25,000 earthquakes in the area over the previous nine days.
The explosive volcanic eruption on Saint Vincent and the Grenadines was the culmination of a significant uptick in seismic activity that began on Thursday.
This is the first eruption in the area where the volcano is located for nearly 800 years.
Volcanologist Colin Wilson says the findings "change the way we think about the massive Yellowstone explosions."
Russia's Bezymianny volcano has been growing again after collapsing over 60 years ago.
A nanny cam recorded the heroic actions of one migrant worker who, while vacuuming, rushed to save a child amid the Beirut blast.
The Weishan volcano last erupted 50,000 years ago.
The eruption was so big it covered an area the size of New Jersey in volcanic glass.
A Ford Pinto versus the deadliest volcanic explosion in U.S. history makes Richard Lasher's famous photo one of the most fascinating to come from the eruption of Mount St. Helens 20 years ago.
Ice volcanoes are a common sight on the north shore of Lake Superior during the winter months. They require a combination of high surf, cool temperatures and ice.
At least six people have died, another eight are missing and 31 are injured after the volcano on White Island, erupted off the coast of New Zealand.
"Knowing this will help us understand supereruptions that have occurred before, and those that will occur in the future."
The volcano famously experienced the largest caldera-forming eruption Europe has seen in the past 200,000 years.
Rescue workers are still battling to reach the hardest-hit areas of Saturday's disaster.
The eruption started in April and continued through August, as magma drained and the caldera collapsed.
Scientists analyzing volcanic samples in Italy find similar conditions preceded eruptions over the last 60,000 years.
Misinformation, one scientist said, "causes unnecessary and unfounded anxiety" about the iconic national park.