Northern America

Zach Miners in ComputerWorld: “Twitter users reacted fast to the explosions that ripped through the Boston Marathon Monday, but the incident also revealed how social media can only be so reliable in such situations. Twitter spread news of the blasts quickly and was a useful communications tool for public authorities such as the Boston police and the marathon organizers. But information on social media sites can also be questionable or just plain inaccurate, noted Greg Sterling, senior analyst with Opus Research…
The Boston Police Department’s Twitter log showed a positive side of social media. It was updated minute by minute in the aftermath of the bombings, often with instructions about which areas to avoid, or information about where the most police officers might be stationed.
There was also misinformation, however. A report was circulated quickly on Twitter that police had shut down cellphone service in Boston to prevent detonation of further blasts, though it ultimately turned out to be inaccurate, according to network operators.
Others had nefarious intentions. At one point, a Twitter account with the handle @_BostonMarathon was promising to donate US$1 to victims of the blast for every one of its tweets that was retweeted. Users soon called it out as a fake, noting the real Twitter account for the Boston Marathon was @BostonMarathon.”
See also: Google’s Person Finder

NextGov story: “Some of the same social media analyses that have helped Google and the Centers for Disease Control and Prevention spot warning signs of a flu outbreak could be used to detect the rumblings of violent conflict before it begins, scholars said in a paper released this week.
Kenyan officials used essentially this system to track hate speech on Facebook, blogs and Twitter in advance of that nation’s 2013 presidential election, which brought Uhuru Kenyatta to power.
Similar efforts to track Syrian social media have been able to identify ceasefire violations within 15 minutes of when they occur, according to the paper on New Technology and the Prevention of Violence and Conflict prepared by the United States Agency for International Development, the United Nations Development Programme and the International Peace Institute and presented at the United States Institute of Peace Friday.”