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Social media offer unprecedented opportunities to terrorist groups to spread their message and target specific audiences for indoctrination and recruitment. In 2013 and 2014, social media, in particular Twitter, overtook Internet forums as preferred space for jihadist propaganda. This article looks into Arabic statements by Jabhat al Nusra, Islamic State and jihadist forum administrators and online activists to argue that, beside the easier use of social media and disruption and infiltration of the forums, the conflict between the jihadist groups accelerated the migration to social media and the building of a presence on Twitter that provided relative resilience to suspensions.

Recent terrorist attacks carried out on behalf of ISIS on American and European soil by lone wolf attackers or sleeper cells remind us of the importance of understanding the dynamics of radicalization mediated by social media communication channels. In this paper, we shed light on the social media activity of a group of twenty-five thousand users whose association with ISIS online radical propaganda has been manually verified. By using a computational tool known as dynamical activity-connectivity maps, based on network and temporal activity patterns, we investigate the dynamics of social influence within ISIS supporters. We finally quantify the effectiveness of ISIS propaganda by determining the adoption of extremist content in the general population and draw a parallel between radical propaganda and epidemics spreading, highlighting that information broadcasters and influential ISIS supporters generate highly-infectious cascades of information contagion. Our findings will help generate effective countermeasures to combat the group and other forms of online extremism.

VOX-Pol Blog post.

This paper discusses the use of computer support to analyze IS propaganda. We focus on thematic analysis of the textual content of various types of online propaganda, and investigate two different ways to identify themes in the data. One approach is theory-driven and builds on previous analysis of IS propaganda, and the other approach is data-driven and automatically identifies prevalent themes in the data. We exemplify the various approaches using different types of IS propaganda and we also provide examples of how the computer-assisted analysis can be used to analyze variation in the data over time. Both approaches indicate an increase in more violent themes in more recent IS propaganda.

Terrorist groups have proved in recent years that they are particularly adept at
utilizing the Internet and social media to facilitate their activities, including incitement
to commit a terrorist act, radicalization to violence, recruitment, training, planning,
collection of information, communication, preparation, financing and execution of
attacks. In addition to Al-Qaida, one terrorist entity that has benefited significantly from
ICT is the Islamic State in Iraq and the Levant (ISIL), also known as Daesh. ISIL and its
supporters exploit the Internet as a means to broadcast its ideology and has made effective
use of the vast reach and rapidly evolving communications environment provided by
social media applications, which also serve as a highly effective tool for ISIL recruiters,
who have succeeded in attracting a global pool of around 25,000 foreign fighters from
over 100 States.

Acute crisis events ranging from natural disasters to terrorist incidents now tend to generate an almost immediate response from social media users. This is especially pronounced on Twitter, due to that platform’s specific affordances as a particularly open and real-time medium. While analyses of such events have increased over recent years, we still understand relatively little about the way in which audiovisual materials relating to such crises are circulated and what they contribute to processes of witnessing. This is important, however, in an increasingly visual age when audiovisual material tends to be more widely viewed and shared than plain-text updates, and thus has a greater potential to influence viewers’ interpretations of an event. To address this gap in our understanding, this article investigates the distribution dynamics of audiovisual content on Twitter in the immediate aftermath of terror attacks in Paris and Brussels. Results point to the importance of broadening conceptualisations of conflict-related visuals and the ongoing relevance of affective content in such material. Furthermore, this article argues that contexts of time and space are crucial to consider, as is the role that individual actors – both human and non-human – play in disseminating such content.