AUTHOR=Horwell C. J. , Baxter P. J. , Damby D. E. , Elias T. , Ilyinskaya E. , Sparks R. S. J. , Stewart C. , Tomašek I. TITLE=The International Volcanic Health Hazard Network (IVHHN): reflections on 20 years of progress JOURNAL=Frontiers in Earth Science VOLUME=11 YEAR=2023 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2023.1213363 DOI=10.3389/feart.2023.1213363 ISSN=2296-6463