When the explosion finally arrives, it is all the spectacle that it was imagined to be. Unfortunately, without a molten core to set off, it is Rand's magical accompaniment that comprises most of the spectacle.
The first loud crack, undoubtedly stretching through the vacuum with arcane assistance, is accompanied by blasts of compressed air launching out through the planet's surface, sending forth colossal geysers of sand visible even from orbit. The planet shakes with what it undoutedly a tremendous earthquake, a shaking visible even from afar as the air shoots out ever faster.
Soon, the entirety of the desert is floating up above the surface, sandy clouds suspended by blasts of air from every hole in the surface that the worldroot had left behind. Through small holes in these clouds, you can see the world of pockmarked stone down below, cracking as the clouds quiver and shift.
At last, the planet almost seems to crumble into pieces, continent-sized hunks of rock floating in a thick mess where the planet once stood, an aurora of glittering sand filling the gaps between them like the rings of a distant world.
No sooner do you pick up a second source of light among the wreckage, a faint green glow from deep within the rocks, than the explosions truly start. With bursts of green fire resembling fireworks on the night sky, the remaining stones explode, first into nation-sized chunks, then into simply large meteorites, and finally into mere space debris. that scatters as far as the eye can see. These explosions, aided in providing sound as the initial crack, rouse what sentient troops you possess from vacant awe to excitement.
The destruction of Solterra, for better or worse, was truly a thing to remember.