12 days after its powerful eruption on 17 April, 10-minute JMA Himawari-9 AHI Infrared Window (10.4 µm) images (above) showed another explosive eruption of Mount Ruang in Indonesia on 29 April 2024. The coldest cloud-top infrared brightness temperatures reached -90ºC (internal yellow pixels) at 1850 UTC, shortly after eruption onset. Note that the volcanic umbrella cloud exhibited concentric... Read More
10-minute JMA Himawari-9 AHI Infrared Window (10.4 µm) images (above) showed an explosive eruption of Mount Ruang in Indonesia on 17 April 2024. Note that a thunderstorm was reported at Menado (station identifier WAMM) from 1400-1430 UTC, due to abundant lightning activity within the dense volcanic umbrella cloud.In the Himawari-9 Infrared Window... Read More
GOES-16 (GOES-East) SO2 RGB images created using Geo2Grid (above) showed the volcanic cloud (lighter shades of cyan) resulting from an eruption of La Cumbre (Fernandina) in the Galápagos Islands on 03 March 2024. The thermal anomaly at the volcano summit — which first became apparent at 0550 UTC — appeared as clusters... Read More
GOES-16 (GOES-East) Split Window Difference (10.3-12.3 µm) along with SO2 RGB and Ash RGB images (above) displayed signatures of volcanic clouds produced by a sequence of eruptions of Popocatépetl in Mexico on 21 February 2024. Although these volcanic clouds apppeared to be predominantly ash-dominated (shades of pink to magenta in the Ash RGB,... Read More
