In which major European city, there is a volcano that may soon erupt?

in Porto
in Heraklion
in Naples
in Palermo
Lying mostly underwater, Campi Flegrei comprises 24 craters. It is one of the largest volcanoes in the world, capable of producing VEI 7 (super-colossal) eruptions. Its most recent eruption of 1538 created a new hill, Monte Nuovo.
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Very interesting!
reach: rather globalcitiescities of Europecities of ItalydisastersEuropegeographygeography of ItalyItalynatural disastersvolcanoes

Answers by country

in Porto
in Heraklion
in Naples
in Palermo
answers
flagItaly
0%
2%
82%
13%
144
flagSwitzerland
2%
7%
72%
15%
120
flagAustria
2%
3%
70%
20%
158
flagthe Netherlands
3%
3%
70%
22%
81
flagGermany
3%
7%
69%
17%
1017
flagGreece
3%
3%
69%
24%
66
flagRepublic of Ireland
0%
7%
67%
25%
71
flagthe United Kingdom
3%
10%
66%
18%
567
flagUnknown
8%
11%
66%
13%
36
flagPoland
3%
10%
65%
19%
32222
flagAustralia
4%
11%
64%
15%
97
flagBelarus
7%
11%
61%
19%
96
flagthe United States
4%
12%
60%
20%
1135
flagFrance
4%
9%
60%
21%
41
flagUkraine
10%
10%
56%
19%
707
flagKazakhstan
8%
13%
56%
19%
67
flagIndia
11%
16%
55%
14%
200
flagCanada
4%
8%
55%
28%
81
flagSpain
2%
11%
54%
28%
42
flagRussia
7%
10%
52%
26%
580