#Wildfires in #Siberia continue to produce very thick #smoke (dark red) today, 22 Sep, shown by #NOAA20 #VIIRS aerosol optical depth (AOD). Area of thick smoke (AOD > 1) approximately equal to the size of Montana! pic.twitter.com/VqLnHBrFnA

— AerosolWatch (@AerosolWatch) September 22, 2020