000K utf8 1100 2021$c2021-05-06 1500 eng 2050 urn:nbn:de:gbv:wim2-20210804-44634 2051 10.5194/nhess-21-1431-2021 3000 Wiegmann, Matti 3010 Kersten, Jens 3010 Klan, Friederike 3010 Potthast, Martin 3010 Senaratne, Hansi 3010 Stein, Benno 4000 Opportunities and risks of disaster data from social media: a systematic review of incident information$hEuropean Geophysical Society [Wiegmann, Matti] 4030 Katlenburg-Lindau$nEuropean Geophysical Society 4209 Compiling and disseminating information about incidents and disasters are key to disaster management and relief. But due to inherent limitations of the acquisition process, the required information is often incomplete or missing altogether. To fill these gaps, citizen observations spread through social media are widely considered to be a promising source of relevant information, and many studies propose new methods to tap this resource. Yet, the overarching question of whether and under which circumstances social media can supply relevant information (both qualitatively and quantitatively) still remains unanswered. To shed some light on this question, we review 37 disaster and incident databases covering 27 incident types, compile a unified overview of the contained data and their collection processes, and identify the missing or incomplete information. The resulting data collection reveals six major use cases for social media analysis in incident data collection: (1) impact assessment and verification of model predictions, (2) narrative generation, (3) recruiting citizen volunteers, (4) supporting weakly institutionalized areas, (5) narrowing surveillance areas, and (6) reporting triggers for periodical surveillance. Furthermore, we discuss the benefits and shortcomings of using social media data for closing information gaps related to incidents and disasters. 4950 https://doi.org/10.5194/nhess-21-1431-2021$xR$3Volltext$534 4950 https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20210804-44634$xR$3Volltext$534 4961 https://www.db-thueringen.de/receive/dbt_mods_00061160 5051 004 5550 Datenbank 5550 Datensammlung 5550 Information 5550 Katastrophe 5550 Katastrophenmanagement 5550 Social Media 5550 Social Media