The main modern Mount St. Helens eruption was May 18, 1980 — yet there were also later paroxysmal eruptions, such as on June 12/13, 1980. Geostationary satellite imagery from NASA’s SMS-2 (Synchronous Meteorological Satellite) monitored two more Mount St. Helens eruptions on July 22th (local time), 1980, as shown above. Note that in... Read More
SMS-2The main Mount St. Helens eruption was May 18, 1980 — yet there were also later paroxysmal eruptions. Imagery from NASA’s SMS-2 (Synchronous Meteorological Satellite) monitored two more Mount St. Helens eruptions on June 12th (local time), 1980, as shown above. Note that in “UTC-time”, the eruption took place on June 13th. A... Read More
NOAA GOES-3 Visible (0.65 µm) images at 1545 and 1615 UTC (above) showed the volcanic cloud shortly after the explosive eruption of Mount St. Helens on 18 May 1980. GOES-3 was decommissioned in 2016.The corresponding GOES-3 Infrared (11.5 µm) image at 1545 UTC (below) appeared to display a small “enhanced-V” or cold/warm (-65ºC/-47ºC)... Read More
https://cimss.ssec.wisc.edu/satellite-blog/wp-content/uploads/sites/5/2020/05/BAMS_Sat_covers2_1min.mp4A collection of 60 BAMS covers spanning the years, to highlight the rapid advance of imaging from the geostationary orbit, is shown above (a version that loops more slowly can be seen here). The first cover is the first of BAMS, in January of 1920, while the second, from... Read More
