The Earth at Night, Updated

NASA Earth Observatory images by Joshua Stevens, using Suomi NPP VIIRS data from Miguel Rom├ín, NASA’s Goddard Space Flight Center.

NASA has released updated global maps of the Earth at night. The so-called “black marble” maps show where human activity lights up the darkness. NASA’s page highlights some of the differences between the 2016 and 2012 versions of the map with before/after interactive sliders. John Nelson has tried something different: overlaying the 2016 map on the 2012 map with a clipping mask shows newly illuminated parts of the globe as dark patches.

John M. Nelson, “A Changing Earth at Night,” 2017.