The study aims to reveal the communication and coordination problems experienced after an earthquake, to find out the measures the institutions took against a potential earthquake, to determine the communication technologies they use in case of an earthquake and to explain the advantages and disadvantages of the social media after an earthquake. Although Turkey has experienced severe earthquakes before and after the August 17, 1999 earthquake, the 1999 earthquake has been a milestone in raising an awareness and taking precautions due to the proximity of the earthquake to Istanbul, the loss of too many lives and properties, the lack of coordination, the lack of coordination and the complete interruption of communication. The complete loss of communication due to the failure of mobile communication caused by black outs, and the inability of government officials to obtain information from the earthquake zone in the first 48 hours have led the government, municipalities, NGOs, and universities to work in coordination in response to disaster management. The traditional media has published/broadcast for months to raise awareness about the needs in the earthquake zone. The first use of social media in Turkey in case of a disaster was the Van Ercis earthquake on October 23, 2011. The study incorporated the methodology of literature review. In addition, a qualitative and individual interview was held with Can Cubukcuoglu, AFAD Istanbul Corporate Communication Manager Responsible, on January 14, 2014. The interview was conducted in an unstructured and open ended manner. As a result of the study, the most important problem identified was the lack of bi-directional communication in official institutions. After an earthquake, bureaucracy and hierarchy slow down the process. Positive developments have been recorded in communication technologies and the use of these technologies since the 1999 earthquake. The rapid flow of information, the ability to act independently from the bureaucracy, the increase in the number of smartphone users, and the frequent updates have made the social media an effective means of communication in disasters