Ejecta
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Ejecta are particles ejected from an area. In volcanology, in particular, the term refers to particles including pyroclastic materials that came out of a volcanic explosion and magma eruption volcanic
Mt. St Helens eruption plume on 22 July 1980, showing ejecta in the form of pyroclastic material (ash)
Operation Plumbbob
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Operation Plumbbob was a series of nuclear tests that were conducted between May 28 and October 7, 1957, at the Nevada Test Site, following Project 57, and preceding Project 58/58A.
Ejecta
…launched by humans into space with a range of launch systems, some instances particularly nuclear produce artificial ejecta, like in the case of the Pascal-B test which might have ejected an object into space with a speed exceeding Earth's escape velocity…
Plumbbob-Rainier device
Plumbbob-John launch, via F-89