I think this is really a major finding, finding up to three meters of ash that was traveling along the ground at hurricane velocities like the blast at Mount St. Helens. It would be like the blast of Mount St. Helens occurring but having a city that was destroyed.
The pattern is that every 2,000 to 3,000 years, there is a monstrous eruption (of Mount Vesuvius). And it has now been about 2,000 years.