美国当地事件2013年4月15日(北京时间4月16日)波士顿马拉松现场发生爆炸。爆炸发生后,有关该事件的信息迅速在twitter、facebook上迅速传播,信息呈爆炸式增长。在这次突发事件中,社交网络等新媒体无疑再次冲在了信息发布传播的前沿,为此次事件发布信息、寻找受伤者等起到了传统媒体无法取代的作用。但同时,社交媒体等大范围的信息爆炸式的传播也在一定程度上渲染了一种环境氛围,而这种氛围在很大程度上可以影响置身其中且由于事件的突发性质,而难以理性思考的群体,从而产生一种集体情绪的极化。本文以此次波士顿爆炸案中信息在社交媒体中的传播为例分析,从而总结出社交媒体在突发事件信息传播过程中的作用特点。 Local events in the United States April 15, 2013 (Beijing time April 16) Boston marathon site explosion. After the explosion, information about the incident rapidly spread on twitter, facebook and the information exploded. In this unexpected event, new media such as social networks undoubtedly rushed to the forefront of information dissemination and dissemination, releasing information and finding wounded for this incident played an irreplaceable role in traditional media. But at the same time, the widespread information explosion such as social media has also rendered a kind of environmental atmosphere to a certain extent, and this kind of atmosphere can largely affect the exposure and is irrational due to the unexpected nature of the events Thinking group, resulting in a polarization of collective emotions. This article takes the information dissemination in the Boston bombings as an example in the analysis of social media to summarize the social media’s role in the dissemination of emergency information.