Tafsir of Al-Qari`ah 101:2

Al-Qari`ah. What is Al-Qari`ah? Al-Qari`ah is one of the names of the Day of Judgement, like Al-Haqqah, At-Tammah, As-Sakhkhah, Al-Ghashiyah and other names. Then Allah intensifies concern and fright for it by saying,

وما أدراك ما القارعة