A previous blog post highlighted the eruption of the Mauna Loa Volcano in Hawaii. This past week, the volcanic activity quickly quieted down, with very little activty present by Dec 13. Satellite imagery also showed the progressive calming of the volcano over the last 7+ days. Specifically, the VIIRS Day Night band from SNPP and NOAA-20, each evening, captured the decrease in light emitted from the volcano and adjacent lava flow (Fig 1). Toggling through the images from Dec 6-12, the light coming from the volcano and adjacent lava flow area quickly decreases to only a faint signal at the Volcano.
Figure 1: 4-12 Dec 2022 NOAA-20 and S-NPP VIIRS Day Night Band Near Constant Contrast product centered over the Mauna Loa Volcano. See below for Animation form.
Volcano procedure imagery from the 14th, similar as that shown in the aforementioned blog post (but with Geocolor used instead of VIS), shows only a faint hot spot centered over the volcano, with no lava flow heat signature. The SO2 signature previously present was also not detected.
Bill Line, NESDIS/STAR
Satellite Liaison Blog 