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Sydney study finds higher natural radiation in Glebe due to ancient rock, but levels remain safe.
A University of Sydney study led by Dr. Laura Manenti has mapped natural background radiation across Sydney, finding higher levels in Glebe due to uranium and thorium-rich ancient sandstone and shale.
Using gamma ray detectors and soil samples from 100 park locations, researchers measured an average of 0.24 millisieverts per year—well below safety limits and typical for natural background radiation.
Geology accounted for nearly all radiation, with cosmic rays measured via ferry to isolate land-based sources.
Levels remain safe, with no health risks identified, and the data provides a baseline for future monitoring.
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El estudio de Sydney encuentra una mayor radiación natural en Glebe debido a la roca antigua, pero los niveles permanecen seguros.