As the internet and social media continue to become increasingly used for sharing breaking news and important updates, it is with great motivation to study the behaviors of online users during crisis events. One of the biggest issues with obtaining information online is the veracity of such content. Given this vulnerability, misinformation becomes a very dangerous and real threat when spread online. This study investigates misinformation debunking efforts and fills the research gap on cross-platform information sharing when misinformation is spread during disasters. The false rumor “immigration status is checked at shelters” spread in both Hurricane Harvey and Hurricane Irma in 2017 and was analyzed in this paper based on a collection of 12,900 tweets. By studying the rumor control efforts made by thousands of accounts, we found that Twitter users respond and interact the most with tweets from verified Twitter accounts, and especially government organizations. Results on sourcing analysis show that the majority of Twitter users who utilize URLs in their postings are employing the information in the URLs to help debunk the false rumor. The most frequently cited information comes from news agencies when analyzing both URLs and domains. This paper provides novel insights into rumor control efforts made through social media during natural disasters and also the information sourcing and sharing behaviors that users exhibit during the debunking of false rumors.

随着互联网和社交媒体越来越多地用于共享突发新闻和重要更新，研究危机事件期间在线用户的行为具有极大的动机。在线获取信息的最大问题之一是此类内容的准确性。鉴于存在此漏洞，错误信息在网上传播时会成为非常危险和真实的威胁。这项研究调查了错误信息的拆封工作，并填补了在灾难期间传播错误信息时跨平台信息共享的研究空白。2017年在哈维飓风和艾尔玛飓风中流传着“在避难所检查移民状况”的谣言，并根据12900条推文对本文进行了分析。通过研究数千个帐户在谣言控制方面的努力，我们发现，Twitter用户使用经过验证的Twitter帐户（尤其是政府组织）中的推文进行响应并进行最多的互动。采购分析的结果显示，大多数在其帖子中使用URL的Twitter用户正在使用URL中的信息来帮助揭穿虚假谣言。在分析URL和域时，最常引用的信息来自新闻社。本文提供了对自然灾害期间通过社交媒体进行的谣言控制工作以及用户在揭穿虚假谣言时表现出的信息来源和共享行为的新颖见解。采购分析的结果表明，大多数在其帖子中使用URL的Twitter用户正在使用URL中的信息来帮助揭穿虚假谣言。在分析URL和域时，最常引用的信息来自新闻社。本文提供了对自然灾害期间通过社交媒体进行的谣言控制工作以及用户在揭穿虚假谣言时表现出的信息来源和共享行为的新颖见解。采购分析的结果表明，大多数在其帖子中使用URL的Twitter用户正在使用URL中的信息来帮助揭穿虚假谣言。在分析URL和域时，最常引用的信息来自新闻社。本文提供了对自然灾害期间通过社交媒体进行的谣言控制工作以及用户在揭穿虚假谣言时表现出的信息来源和共享行为的新颖见解。