Mother has been trapped underground for thousands of years, slumbering under the weight of the world above.
WHO STIRRED MOTHER, AND WHY
Since being stirred, Mother has pushed up against the continent above her, slowly making a push directly up towards the surface where she can fully awaken.
At the beginning of 1113 GE, Mother is trapped 5 miles beneath the surface of Al'tehrun. If she moves an average of 1 inch up every minute, she will reach the surface in 220 days. At 1 inch every 10 minutes, that's 2200 days or 6.5 years (336 days per year), 30 minutes, that pushes to 6600 days or 19.5 years
She emerged after Amalar Crys used the Earthsplitter on the eve of the Unknown. She made her way inland of Olessar with Valduumia on her back. A half day out from Sedesend, she crossed paths with Bill's Bimbos in their newly constructed Titan Apparatus. It was a long, arduous fight for both sides, but Motherw as subdued and successfully sealed back underground. She now is in a deep sleep within the smaller purple moon of Orchuun, taking up almost 40% of that asteroid's volume.