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%
89%
9%
66
flagAustria
0%
0%
77%
16%
31
flagFrance
0%
0%
73%
20%
15
flagGreece
0%
5%
71%
23%
38
flagGermany
4%
9%
67%
18%
192
flagSwitzerland
0%
17%
67%
10%
28
flagthe United Kingdom
3%
12%
66%
16%
315
flagUnknown
8%
11%
66%
13%
36
flagPoland
3%
11%
64%
19%
27654
flagthe Netherlands
9%
6%
64%
19%
31
flagCanada
1%
10%
62%
23%
56
flagRepublic of Ireland
0%
13%
62%
24%
29
flagUkraine
8%
7%
60%
20%
201
flagAustralia
3%
14%
60%
16%
56
flagthe United States
4%
13%
59%
20%
785
flagBelarus
11%
17%
58%
11%
34
flagIndia
11%
16%
54%
16%
117
flagRussia
5%
11%
50%
30%
159
flagSpain
5%
10%
50%
35%
20
flagthe Philippines
19%
26%
38%
7%
26