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%
1%
92%
5%
55
flagAustria
0%
0%
79%
12%
24
flagGreece
0%
6%
75%
18%
32
flagthe Netherlands
7%
7%
70%
14%
27
flagSwitzerland
0%
15%
69%
11%
26
flagthe United Kingdom
4%
12%
66%
16%
289
flagGermany
4%
9%
66%
18%
137
flagUnknown
8%
11%
66%
13%
36
flagPoland
3%
11%
64%
20%
27032
flagCanada
0%
11%
64%
22%
53
flagRepublic of Ireland
0%
14%
64%
21%
28
flagTurkey
7%
7%
61%
23%
13
flagthe United States
4%
13%
59%
20%
754
flagAustralia
4%
16%
58%
14%
48
flagUkraine
9%
8%
57%
22%
171
flagIndia
11%
12%
57%
16%
108
flagBelarus
11%
18%
55%
14%
27
flagRussia
4%
10%
54%
28%
135
flagSpain
5%
11%
50%
33%
18
flagthe Philippines
20%
28%
40%
4%
25