Risk is one of the main features of modern societies. With the Internet a new media has appeared, which on the one hand has increased the risk associated with information: free accessibility, interactivity, globality, and connectivity of personal, economical, political and media communication have all led to a loss of journalistic control over the information market. On the other hand Internet-...

Abstract Recent years have seen another peak in global media attention to climate change. Driven by increasingly dire news about extreme weather, growing demands of systemic adaption and a new wave political activism, the current situation has been framed as crisis . This introductory essay maps these recent developments elaborates conceptual potentials limitations “crisis” frame. It also brief...

The role of social media, in particular microblogging platforms such as Twitter, as a conduit for actionable and tactical information during disasters is increasingly acknowledged. However, time-critical analysis of big crisis data on social media streams brings challenges to machine learning techniques, especially the ones that use supervised learning. The scarcity of labeled data, particularl...

Crisis informatics is a field of research that investigates the use of computer-mediated communication— including social media—by members of the public and other entities during times of mass emergency. Supporting this type of research is challenging because large amounts of ephemeral event data can be generated very quickly and so must then be just as rapidly captured. Such data sets are chall...

While categorizing any type of user-generated content online is a challenging problem, categorizing social media messages during a crisis situation adds an additional layer of complexity, due to the volume and variability of information, and to the fact that these messages must be classified as soon as they arrive. Current approaches involve the use of automatic classification, human classifica...

Crisis Informatics is a multidisciplinary research area that examines the socio-technical relationships among people, information, and technology during mass emergency events. One area of crisis informatics examines the on-line behaviors of members of the public making use of social media during a crisis event to make sense of it, to report on it, and, in some cases, to coordinate a response to...

Crisis informatics is a field of research that investigates the use of computer-mediated communication— including social media—by members of the public and other entities during times of mass emergency. Supporting this type of research is challenging because large amounts of ephemeral event data can be generated very quickly and so must then be just as rapidly captured. Such data sets are chall...