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What does SPE stand for?

SPE stands for Solar Proton Event

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We have 234 other meanings of SPE in our Acronym Attic

Samples in periodicals archive:

One clear-cut check of these highly complex models is to look at solar proton events (SPEs), in which large numbers of high-energy protons, released by the sun at the peak of its sunspot cycle, are channeled by the earth's magnetic field into the polar region where they disrupt the chemical balance by ionizing molecules.