SAN FRANCISCO — In the search for rogue nukes, researchers have discovered an unlikely tool: astronomical radio telescopes.
Ohio State University researchers previously demonstrated another unlikely tool, when they showed that South Korean GPS stations detected telltale atmospheric disturbances from North Korea’s 2009 nuclear test.
Both techniques were born out of the discovery that underground nuclear explosions leave their mark—on the outer reaches of Earth’s atmosphere. (more…)
Even underground nuclear tests leave their mark on the part of the upper atmosphere known as the ionosphere, the researchers discovered, when they examined GPS data recorded the same day as a North Korean nuclear test in 2009. Within minutes on that day, GPS stations in nearby countries registered a change in ionospheric electron density, as a bubble of disturbed particles spread out from the test site and across the planet. (more…)
