This study adopts a structuration perspective to examine the knowledge sharing activities within local communities using social media to combat the 7-month 2011 Thai food crisis using a qualitative case study. The crisis represented a unique situation wherein social media was used extensively during the most catastrophic food crisis in Thailand. Data were collected from focus groups and in-depth interviews with food victims, community leaders, NGOs, politicians, large enterprises, and Army leaders. The study divides the crisis event into three phases: pre-, during-, and post-crisis, treating each as both separate and interrelated, due to the changing information needs. The socialization and structuration theories were used as theoretical lenses to investigate how social media can play an important role in knowledge sharing activities in each phase of a crisis. The case study shows that social media can be adapted to fit the information and knowledge needs in each phase. This study's findings are useful and relevant for crisis managers, and clarify the potential usefulness of social media as a knowledge sharing tool during a crisis
