The eruption of Mount St. Helens on May 18, 1980, and subsequent destruction of ap-proximately 593 square kilometers (229 square miles) of vegetation, clearly provided a unique opportunity for earth-oriented satellite remote sensing systems. Landsat, a relatively high resolution Multispectral Scanner (MSS) system, imaged Mount St. Helens both before and after its major eruption. Digital data have been used to create a damage assessment map and a change detection image. Several classes of timber damage and land cover modification have been developed. Acreages for each class have been tabulated.
Charles G. Bohn,
Belden G. Bly,
"Landsat Observations Of Mount St. Helens", Proc. SPIE 0278, Electro-Optical Instrumentation for Resources Evaluation, (6 November 1981); doi: 10.1117/12.931923; https://doi.org/10.1117/12.931923