Eruption of Mount Etna in Italy
![VIIRS True Color RGB images from NOAA-20 (at 1110 and 1220 UTC) and Suomi NPP (at 1200 UTC) [click to enlarge]](https://cimss.ssec.wisc.edu/satellite-blog/wp-content/uploads/sites/5/2018/12/181224_noaa20_suomiNPP_viirs_truecolor_Etna_anim.gif)
VIIRS True Color RGB images from NOAA-20 (at 1110 and 1220 UTC) and Suomi NPP (at 1154 UTC) [click to enlarge]
A toggle between NOAA-20 VIIRS True Color RGB and Infrared Window (11.45 µm) images (below) revealed a colder cloud plume at higher altitude along the southern edge of the tan/brown volcanic ash plume. A thermal anomaly or “hot spot” (dark black pixels) could be seen at the snow-covered volcano summit.
![NOAA-20 VIIRS True Color RGB and Infrared Window (11.45 µm) images at 1250 UTC [click to enlarge]](https://cimss.ssec.wisc.edu/satellite-blog/wp-content/uploads/sites/5/2018/12/181224_1250utc_noaa20_viirs_truecolor_infrared_Etna_anim.gif)
NOAA-20 VIIRS True Color RGB and Infrared Window (11.45 µm) images at 1250 UTC [click to enlarge]
![Suomi NPP VIIRS Ash Probability, Ash Height, Ash Loading and Ash Effective Radius at 1154 UTC [click to play enlarge]](https://cimss.ssec.wisc.edu/satellite-blog/wp-content/uploads/sites/5/2018/12/181224_1154utc_suomiNPP_viirs_ashProbability_ashHeight_ashLoading_ashEffectiveRadius_Etna_anim.gif)
Suomi NPP VIIRS Ash Probability, Ash Height, Ash Loading and Ash Effective Radius at 1154 UTC [click to play enlarge]
![Meteosat-11 Split Window (11.12 µm) Brightness Temperature Difference images [click to play animation]](https://cimss.ssec.wisc.edu/satellite-blog/wp-content/uploads/sites/5/2018/12/181224_meteosat11_splitWindowBTD_Etna_anim.gif)
Meteosat-11 Split Window (11.12 µm) Brightness Temperature Difference images [click to play animation]