40 years since Mount St. Helens eruption


Yesterday 40 years ago in 1980 was the date of the first major volcanic eruption that was recorded by earth observation satellites. There is also imagery of the eruption itself but the more interesting images are those recorded before and after the eruption in higher resolution. Here a pair of images from Landsat 2 MSS – with color rendering based on an estimated blue channel (since the MSS instrument does not record a blue spectral channel).

For comparison here a more recent image from 2019:

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