A wealth of digital information is generated daily through social networks, e.g., Twitter. A number of domains, including public health, national security, public safety, and public policy, can benefit greatly from the awareness of trends and situations as they become observable in social media data. There are many active research projects from various disciplines related to social media analytics. The purpose of this one-day workshop is for SoCal researchers to present their work, exchange ideas, and explore collaboration opportunities in this increasingly important domain.