Eruption of the Sierra Negra volcano in the Galapagos

June 26th, 2018 |

GOES-16 (GOES-East) “Clean” Infrared Window (10.3 µm), Mid-level Water Vapor (6.9 µm) and Low-level Water Vapor (7.3 µm) images beginning late in the day on 26 June 2018 (below) showed that a signature of the volcanic plume was evident in the 7.3 µm imagery for several hours after it was no longer seen in the 10.3 µm or 6.9 µm imagery — this is due to the fact that the 7.3 µm spectral band is also sensitive to SO2 absorption (and this volcanic eruption produced large amounts of SO2).

GOES-16

GOES-16 “Clean” Infrared Window (10.3 µm, top), Mid-level Water Vapor (6.9 µm, middle) and Low-level Water Vapor (7.3 µm, bottom) images [click to play animation | MP4]