Huge explosion keep taking place in the sun. Why do we not hear them on the surface of earth?

It is only an assumption that the sun is powered by fusion. If that were true, the inside would be hotter than the outside, and the reverse is true. If you ask a scientist about this, he will not be able to explain it clearly. Here is a site that explains a different theory and it is very simple and clear: www.thunderbolts.info/wp/daily-tpod/