A combination picture shows satellite images of the Hunga-Tonga-Hunga-Ha'apai volcano's SO2 (sulfur dioxide) cloud travelling through the Pacific on January 14, 2022 (top-L), January 15, 2022 (top-R), January 16, 2022 (bottom-L) and January 17, 2022, in these handout images obtained by Reuters on January 17, 2022.
European Union, Copernicus Sentinel-5P Imagery processed by @DEFIS_EU/Handout via REUTERS