Terrain wipe (Hard)
That means the whole terrain of a planet will be reset to its original state. Every digged hole will be fixed and every placeable device (e.g. Water Generator) removed .
Your structures and Inventory are safe though.
Be careful with Structural Integrity of your bases in such situations.
HWS has such wipes for Golden Globe , Atlantis and Armageddon.
NOTE: Auto Miners and other placeables will be wiped!
Type cb:nextwipe in the game chat to see the upcoming wipe times!