I have a feeling that I’ve met this man:

The findings are from a study by some of Europe’s leading vulcanologists and
public health experts, including Dr Peter Baxter of Cambridge University’s
Department of Public Health.

Baxter — known in the field as “Dr Doom” for his studies of the victims of
eruptions — and a team of Italian scientists calculated the possible death
toll based on the impact of the final phase of an eruption, when a
mushroom-shaped cloud of superheated gas, rock and ash would come crashing
to earth.

“The main cause of death would be the high temperatures — the flows would
penetrate windows, burn people to death and asphyxiate them,” Baxter said.

Some time ago father was the Commodore of Naples (not sure if that is actually the precise title or not) and he brought a vulcanologist over to advise on how dangerous Vesuvius was or wasn’t and I think this is the same man. BTW, the question isn’t what to do if V blows, but what to do when.

Which leads to a little story. The parentals, as part of this look into what it all might mean to the Royal Navy went to one of the labs looking into the very fractured geography of the area (just north of Naples, around Pozzuoli, you don’t actually have hills, rather, just bits and pieces of extinct volcanoes. In fact, in an earlier stay there, we lived on one, Monte Nuovo. Popped up around 1550 or so.) So, they’re looking around and mother sees a map of the area : " Look, Mike, there’s a blue line on this map. It does right down our street and straight under the house. Isn’t that interesting, I wonder what it is?"

" Senora, that is the fault line".