THE next eruption at the apocalyptic Yellowstone volcano will "likely" be triggered by a swarm of earthquakes similar to that currently rattling the region, experts told Daily Star Online. Around 640,000 million years ago, Yellowstone blew its lid, creating a giant sunken crater around the size of 726,000 football pitches. Now a flurry of seismic activity at the "ticking time bomb" site in the US state of Wyoming has provoked fears of another apocalyptic eruption. Researchers at the University of Utah are monitoring the site closely after it was struck by more than 1,200 earthquakes since June 12. Quakes in the area are not rare – with 1,500 to 2,000 hitting the area every year – but experts are stunned by the unusually large size and duration of the swarm. Although risk is said to be "low", a volcanology expert told Daily Star Online the next eruption will "likely be preceded by such seismic activity". If a massive eruption were to occur, a horrific veil of sulfuric acid spewing from