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
flagPakistan
15%
5%
63%
15%
19
flagthe Philippines
17%
25%
56%
0%
39
flagFrance
36%
9%
54%
0%
11
flagthe United States
27%
13%
50%
8%
212
flagthe United Kingdom
21%
13%
50%
14%
95
flagAustralia
19%
19%
50%
11%
36
flagDenmark
30%
0%
50%
20%
10
flagGermany
20%
19%
45%
13%
129
flagSwitzerland
21%
7%
42%
28%
14
flagIndia
24%
20%
41%
12%
401
flagthe Netherlands
30%
20%
40%
10%
10
flagUnknown
30%
16%
36%
16%
30
flagthe United Arab Emirates
36%
18%
36%
0%
11
flagGreece
29%
11%
35%
23%
17
flagPoland
24%
22%
33%
19%
6695
flagCanada
36%
13%
31%
18%
22
flagAustria
25%
25%
25%
20%
20