The eruption of Mt. Shisaldin late in the day on 15 September (Blog Post) was accompanied by lightning. Shishaldin’s latitude is 54.75oN, very near the northern edge of the GOES-18 Geostationary Lightning Mapper’s (GLM’s) field of view, as shown in this Quick Guide; although most of Alaska is not sampled by the GLM... Read More

GOES-18 (GOES-West) SO2 RGB images (above) showed the eastward drift of a volcanic cloud produced by an explosive eruption of Mount Shishaldin that began around 0150 UTC on 16 September 2023. Trace amounts of ash fall were observed at False Pass from 0200-0430 UTC.GOES-18 True Color RGB images from the CSPP GeoSphere site (below) helped to highlight the... Read More

5-minute PACUS Sector GOES-18 (GOES-West) Shortwave Infrared (3.9 µm) and SO2 RGB images (above) showed the thermal anomaly (heat signature) and a plume of SO2 (brighter shades of cyan) for 1.5 hours following the onset of an eruption of Kilauea on the Big Island of Hawai`i late in the day on 10... Read More

GOES-18 (GOES-West) SO2 RGB and Ash RGB images (above) showed the east-southeastward drift of a volcanic cloud produced by an explosive eruption of Mount Shishaldin that began shortly before 1600 UTC on 05 September 2023. The initial volcanic cloud exhibited pale shades of yellow in both RGB types, suggesting a mixture of SO2 and Ash; after 1900 UTC, the... Read More