Natural background radiation is tiny and different everywhere: the ground, the buildings and the altitude all change it. Volunteers connect a Geiger counter to their computer, and every ten minutes a count is sent here. Together the counts become a live map of the background dose rate.
Each stream of counts is tested after a day for the statistics a real counter must show (random, never too smooth, never impossible), and only then earns credit. Open the radiation map »
Every ten, thirty or sixty minutes of counts is one bin; a bin is checked about a day after it arrives.
862 / 1,535 bins (56.2%) · 673 waiting for the check
Newest data 4 min ago · 650 bins in the last 24 hours
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