According to National Geographic, the researchers, Hannah Shamloo and Christy Till, analyzed minerals in fossilized ash from the most recent eruption. What they discovered surprised them – the changes in temperature and composition only took a few decades, much faster than the centuries previously thought.
“We expected that there might be processes happening over thousands of years preceding the eruption,” said Till said in an interview with the New York Times.
The supervolcano last erupted about 630,000 years ago, according to National Geographic. Prior to that, it was 1.3 million years ago, per a report from ZME Science.Read more at InfoWars