What is the typical source of pressure buildup inside a volcano?

centrifugal force of Earth rotation
magma convection
boiling of rainwater
degassing of magma
The whole process begins when hot magma is lifted by convection to the magma chamber. As the pressure in the chamber is lower than deep in Earth's crust, the gas starts to release. Since degassed magma has lower density, it may then sink and be replaced with new one. This process may build up huge pressure of gases, eventually causing explosion.
Sumit Tamang
0
Correct this question
5
Very interesting!
reach: rather globaldisastersexplosionsgeologynatural disastersnaturevolcanoes

Answers by country

centrifugal force of Earth rotation
magma convection
boiling of rainwater
degassing of magma
answers
flagMalaysia
0%
20%
0%
80%
10
flagthe Netherlands
13%
20%
0%
66%
15
flagRomania
0%
30%
10%
60%
10
flagGreece
7%
38%
0%
53%
13
flagAustralia
18%
31%
2%
47%
48
flagthe Philippines
10%
35%
2%
46%
39
flagGermany
12%
38%
5%
43%
39
flagthe United Kingdom
12%
43%
3%
39%
111
flagCanada
0%
61%
0%
38%
18
flagthe United States
7%
46%
6%
36%
297
flagUkraine
24%
27%
12%
36%
33
flagPoland
22%
39%
3%
34%
10946
flagIndia
17%
39%
8%
34%
129
flagPakistan
0%
62%
4%
33%
24
flagRepublic of Ireland
17%
58%
0%
23%
17