It is not my expertise at all. I know the area, I've been there more than once (and will go again!) and I've looked it up using a number of sources. That's crucial. You'll learn nothing by relying on a single popular science source. I go to places and I like to know what's going on, and I've been to Campi Flegrei, I've drunk in the romance of the area (it's my favourite place on planet Earth) and, because I hate not knowing stuff, I've looked it up, and I try to keep up. I'm in awe of our planet's elemental forces, but there will be equations and other technicalities generated by the area's research stations that will be utterly beyond me. But I've been up every one of Europe's active volcanoes except for Cumbrae Vieja in the Canaries (it's on my bucket list) and I just stand on the craters' edges and shake my head. Actually, I should visit the La Palma one before half the island slumps into the Atlantic and wipes out New York with is associated tsunami...