Possible Consequences of Nearby Supernova Explosions for Atmospheric Ozone and Terrestrial Life

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Science  07 Jun 1974:
Vol. 184, Issue 4141, pp. 1079-1081
DOI: 10.1126/science.184.4141.1079


Hard x-ray pulses or increased cosmic radiation originating in nearby supernova explosions may be capable of temporarily removing most of the earth's atmospheric ozone cover even when direct radiation effects at the earth's surface are negligible. Consequently, terrestrial life may be subject to relatively huge solar ultraviolet fluxes every few hundred million years.

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