Quotes: Sphere of Destruction
"The vortex missile that had hit the medicae station was normally mounted on the Titans of the Adeptus Mechanicus Legions. It was the only example of vortex technology the Imperium could reliably repli-cate in any numbers and even then its use was rare. The vortex it created was a chained pocket of no-space, a miniature black hole, an anomaly of physics that sucked anything it touched into the annihilation of the warp. It even sucked in the morning daylight, casting premature dusk over Gravenhold's slums."
Evek: How big was the explosion?
It was really big but it was shaped like a sphere but there was no shockwave, but that's OK...