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%
14%
145
flagSwitzerland
2%
7%
72%
14%
122
flagAustria
2%
3%
70%
20%
159
flagthe Netherlands
3%
3%
70%
22%
81
flagGermany
3%
7%
69%
17%
1027
flagRepublic of Ireland
0%
6%
68%
25%
72
flagGreece
2%
2%
68%
25%
67
flagthe United Kingdom
3%
10%
66%
18%
568
flagUnknown
8%
11%
66%
13%
36
flagPoland
3%
10%
65%
19%
32252
flagAustralia
4%
11%
64%
15%
97
flagthe United States
4%
12%
60%
20%
1139
flagBelarus
7%
11%
60%
20%
97
flagFrance
4%
9%
60%
21%
41
flagUkraine
10%
9%
56%
19%
712
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%
586