On March 11, an earthquake with a magnitude of 8.9, hit about 80 miles off the eastern coast of Japan. It was the largest in Japan's history. At 9 p.m. in Hawaii (2 a.m. EST) U.S. Army Garrison-Hawaii started posting information about the earthquake and subsequent tsunami on Facebook and Twitter. They continued to post and Tweet throughout the night. Soldiers and their families were able to find evacuation information and important updates on the social media sites managed by U.S. Army Garrison-Hawaii, 25th ID and Pacific Command. In this week's Social Media Roundup, we examine the importance of social media in the hours following the earthquake in Japan. We will also outline the steps taken by multiple Army organizations and military leaders to update and inform the public using social media.