AUTHOR=Cameron Cheryl E. , Prejean Stephanie G. , Coombs Michelle L. , Wallace Kristi L. , Power John A. , Roman Diana C. TITLE=Corrigendum: Alaska Volcano Observatory Alert and Forecasting Timeliness: 1989–2017 JOURNAL=Frontiers in Earth Science VOLUME=6 YEAR=2018 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2018.00174 DOI=10.3389/feart.2018.00174 ISSN=2296-6463