The Khorasani in the book of Mehdi Montazar (as) says: In that year [the year of advent] there will be many earthquakes, including a great earthquake in the Damascus... The occurrence of this incident will be after the arrival of the yellow flags in Egypt.
One of the signs of the
Zohoor emaam mahdi (as)
is Hassani .
Hassani or Seyyed Hassani is that he starts his uprising from Iran and goes to Kufa and presents the flag to Imam Mahdi (as). The commander of his army is called Shoaib son Saleh ...