From Lexicanum

This article is a stub

The quake cannon is a gigantic artillery piece mounted on the largest of Imperial Titans, including the Imperator Titan, which mounts it atop its massive carapace. The Imperium's Banesword super-heavy tank also uses this weapon. The Quake Cannon is used to engage targets at extreme range.

Sources

• Warhammer 40,000 Apocalypse - Warlord Titan
• WD351, pg 27
• http://www.games-workshop.com/MEDIA_CustomProductCatalog/m2440064_Imperial_Guard_Datasheet_-_Banesword.pdf