CrisisLex: A Lexicon for Collecting and Filtering Microblogged Communications in Crises

• DOI: 10.1609/icwsm.v8i1.14538
• Publication Date: 2022-11-01T10:04:04Z
• Authors: Alexandra Olteanu; Carlos Castillo; Fernando Diaz; Sarah Vieweg
• Keywords: Situation Awareness; Crisis Communication; Situational ethics

Locating timely, useful information during crises and mass emergencies is critical for those forced to make potentially life-altering decisions. As the use of Twitter broadcast such situations becomes more widespread, problem finding it difficult. We describe an approach toward improving recall in sampling communications that can lead greater situational awareness crisis situations. First, we create a lexicon crisis-related terms frequently appear relevant messages posted different types Next, demonstrate how automatically identify new given crisis. Finally, explain efficiently query extract emergency events. In our experiments, using leads substantial improvements when added set crisis-specific keywords manually chosen by experts; also helps preserve original distribution message types.