Thirty years ago, Mount St. Helens roared back into major activity with a massive eruption that leveled surrounding forest, blasted away over a thousand feet of the mountain’s summit, and claimed 57 human lives.
This short video shows the catastrophic eruption – and amazing recovery – through the eyes of the Landsat satellites, which have been imaging our planet for almost forty years.
NASA Earth Science Video Gallery
NASA Earth Observatory
Safeguarding freshwater resources is crucial, and while scientists use a variety of ground-based techniques to gauge water quality, the Landsat program has provided water quality data from orbit for decades.