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%
86%
11%
116
flagSwitzerland
2%
8%
73%
11%
80
flagthe Netherlands
4%
3%
71%
20%
64
flagGreece
3%
3%
70%
22%
61
flagAustria
2%
3%
69%
19%
103
flagBelarus
8%
11%
68%
11%
70
flagGermany
3%
9%
67%
18%
621
flagthe United Kingdom
2%
10%
67%
18%
477
flagRepublic of Ireland
0%
8%
67%
24%
61
flagUnknown
8%
11%
66%
13%
36
flagFrance
2%
11%
65%
17%
35
flagPoland
3%
10%
64%
19%
30957
flagAustralia
3%
12%
62%
16%
86
flagthe United States
4%
12%
59%
21%
996
flagUkraine
10%
9%
57%
20%
543
flagCanada
4%
8%
57%
27%
70
flagIndia
11%
17%
56%
13%
175
flagRussia
6%
9%
55%
25%
397
flagKazakhstan
15%
6%
53%
25%
32
flagSpain
2%
8%
50%
35%
34