Those aren't explosions. Its the sound it makes when air or water is rushed quickly into the earths crust and changes pressure. the crust is about to shift. all those "Explosions" you hear are the last bits of magma in plastic state breaking the tendrils.


here comes science:

so as the magma loosens, it creates void space below the crust, cause its got less volume when warm. That volume needs to be filled with air or water. that whip crack snap is the sound it makes.

now you know where the worlds water has been vanishing too.