AUTHOR=Paul Jonathan D. , Hannah David M. , Liu Wei TITLE=Editorial: Citizen Science: Reducing Risk and Building Resilience to Natural Hazards JOURNAL=Frontiers in Earth Science VOLUME=7 YEAR=2019 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2019.00320 DOI=10.3389/feart.2019.00320 ISSN=2296-6463