There wasn't anything substantial in the way of natural disasters. These weren't even in the vacinity. It looks like a 'lift-slab' construction problem. The USA tackled that awhile ago.
Asia:
Thursday, April 26, 2007 at 07:59:33 AM - Ankara, Damascus, Riyadh
Thursday, April 26, 2007 at 08:29:33 AM - Tehran, Mashhad
Thursday, April 26, 2007 at 08:59:33 AM - Baghdad, Muscat
Thursday, April 26, 2007 at 09:29:33 AM - Kabul
Thursday, April 26, 2007 at 09:59:33 AM - Samara, Baku, Tashkent, Karachi
Thursday, April 26, 2007 at 10:29:33 AM - Delhi, Bombay, Calcutta
Thursday, April 26, 2007 at 10:59:33 AM - Yekaterinburg, Almaty, Dhaka
Thursday, April 26, 2007 at 11:59:33 AM - Novosibirsk, Bangkok, Jakarta
Thursday, April 26, 2007 at 12:59:33 PM - Krasnoyarsk, Beijing, Manila, Singapore
Thursday, April 26, 2007 at 01:59:33 PM - Irkutsk, Seoul, Tokyo
Thursday, April 26, 2007 at 02:59:33 PM - Chita, Guam
Thursday, April 26, 2007 at 03:59:33 PM - Vladivostok
Thursday, April 26, 2007 at 04:59:33 PM - Magadan
Thursday, April 26, 2007 at 05:59:33 PM - Petropavlovsk-Kamchatskiy
The worst was in Iran. There were a few minor quakes in Europe, but, nothing that would cause this:
There was this though on April 20th.
More or less construction issues. I don't believe Turkey has strict building codes.