If it only happened once by chance, it wouldn't be too bad, but the tremors came several times in a single day.
The geologists quickly realized that something was wrong!
After all, earthquakes are the kind of thing where moving one part shakes the whole system.
Earthquakes are commonly linked to tectonic movements, and those don't just bring ground shaking.
Detection revealed that Yellowstone National Park's underground is accumulating a massive amount of energy.
On the second day of these frequent earthquakes, before they could continue monitoring or observing, Yellowstone National Park in southern Wyoming erupted as a volcano.
This thing can cause mass extinction.
According to scientific analysis, the eruption cycle of Yellowstone's supervolcano is every 600,000-800,000 years, and it's been 640,000 years since the last eruption.