THERE ARE CERTAIN PORTENTS OF THE MAHDI THAT WILL TAKE PLACE IN THE SKY AND ON THE EARTH. Five of them are:     SINKHOLES, FIRE, DESTRUCTION, TURBULENCE AND EARTHQUAKE; WHEN THE BOOK OF GOD – THE MAHDI – IS BETRAYED (WHEN THERE IS AN ATTACK AGAINST HIM, WHEN ONE ACTS TREACHEROUSLY AND DEFAMES HIM), GOD WILL DESTROY SOME TURKISH TOWNS WITH AN EARTHQUAKE

(Kitab Al- Jafr, Imam Ali, p. 350)