微博,是一个内容不超过140字的信息更新与即时分享的个人网络平台。据《第31次中国互联网络发展状况统计报告》显示,截至2012年底,我国微博用户已达3.09亿,微博对我国社会诸多领域的介入和渗透日益广泛。一项来自《中国青年报》社会调查中心的调查表明,在3000余人的调查总体中有87.3%的人表示,会从微博了解公共事件或突发事件并发表意见。微博在突发事件 Weibo is a personal network platform with up to 140 words of information update and instant sharing. According to the “Statistical Report on the Development of the Internet in the 31st China”, as of the end of 2012, the number of microblog users in our country reached 309 million. Weibo has become increasingly involved and infiltrated into many fields of our society. According to a survey conducted by the China Youth Daily Social Investigation Center, 87.3% of the survey population of over 3,000 people said they would know about public events or emergencies from microblogging and express their opinions. Weibo in emergencies