Which is the only moon with active volcanoes?

Titan
Ganymede
Io
Europa
The geologic activity of Io is the result of tidal heating from friction generated within Io's interior as it is pulled between Jupiter and the other Jupiter's moons. With over 400 active volcanoes, Io is the most geologically active object in the Solar System.
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Answers by country

Titan
Ganymede
Io
Europa
answers
flagSouth Africa
0%
7%
84%
0%
13
flagPakistan
15%
9%
62%
12%
32
flagFrance
26%
15%
57%
0%
19
flagRepublic of Ireland
20%
6%
53%
20%
15
flagthe Philippines
20%
27%
50%
2%
48
flagthe United States
26%
14%
49%
9%
294
flagthe United Kingdom
24%
13%
47%
14%
138
flagDenmark
33%
0%
46%
20%
15
flagAustralia
21%
21%
44%
12%
47
flagIndia
25%
18%
42%
12%
559
flagGermany
22%
19%
40%
16%
462
flagSwitzerland
26%
14%
39%
19%
41
flagAustria
25%
20%
37%
15%
72
flagUnknown
28%
15%
37%
18%
32
flagthe United Arab Emirates
31%
18%
37%
6%
16
flagPoland
23%
21%
35%
18%
7855
flagGreece
25%
15%
35%
25%
20
flagBrazil
25%
25%
33%
12%
24
flagthe Netherlands
18%
40%
31%
9%
22
flagCanada
30%
16%
23%
30%
30