The Earth collapsing
حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ الْجَهْضَمِيُّ، حَدَّثَنَا أَبُو أَحْمَدَ، حَدَّثَنَا بَشِيرُ بْنُ سَلْمَانَ، عَنْ سَيَّارٍ، عَنْ طَارِقٍ، عَنْ عَبْدِ اللَّهِ، عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ قَالَ " بَيْنَ يَدَىِ السَّاعَةِ مَسْخٌ وَخَسْفٌ وَقَذْفٌ " .
It was narrated from ‘Abdullah that the Prophet (ﷺ) said: “Just before the Hour comes there will be transformations, the earth collapsing, and Qadhf. (i.e. the throwing of stones perhaps as a means of punishment – maybe it refers to landslides).”