Study Shows a Single Nuclear Blast Could Disable 99% of Satellites in a Matter of Days

A study published this week models the effects of a single nuclear explosion in low Earth orbit and concludes that the resulting radiation belts would disable an estimated 99 percent of satellites operating in that regime within a matter of days. The research, highlighted by ScienceAlert, The Independent, WION, UA.NEWS, heise online, and Around Prague, simulates how high-energy electrons injected into the magnetosphere would persist for weeks, progressively degrading solar arrays, electronics, and sensors on spacecraft including large constellations such as Starlink. According to the coverage, the simulation tracks particle dynamics over a 15-day window and finds that even hardened military and commercial platforms would accumulate mission-ending total ionizing dose levels. The outlets note that the study does not specify the yield or altitude of the modeled detonation, nor does it identify the research institution or journal where the work appears.

Coverage from the six outlets emphasizes the speed and scale of the projected satellite loss, with heise online specifying a 15-day timeline for Starlink and other constellations to be disabled. The Independent and ScienceAlert both lead with the 99-percent figure, while WION frames the aftermath as indirect doom for ground-based infrastructure that relies on space assets. Around Prague and UA.NEWS echo the core finding without adding new technical detail. None of the articles quote the study authors directly, and no independent expert commentary is reported in the provided coverage.

The context for the findings includes the rapid expansion of low-Earth-orbit mega-constellations and renewed geopolitical debate over the Outer Space Treaty’s prohibition on nuclear weapons in orbit. Previous high-altitude nuclear tests such as Starfish Prime in 1962 created artificial radiation belts that damaged early satellites, but the current orbital population is orders of magnitude larger and more commercially critical. The coverage does not state whether the new model incorporates modern satellite hardening standards or active debris-removal concepts, nor does it mention any policy response from space-faring nations.

What to watch next includes whether the study is submitted for peer review in a major journal, whether satellite operators such as SpaceX, OneWeb, or Amazon’s Project Kuiper issue technical rebuttals or mitigation plans, and whether diplomatic forums such as the UN Committee on the Peaceful Uses of Outer Space reference the findings in upcoming sessions. The coverage does not indicate any scheduled briefings, congressional hearings, or regulatory actions tied to the research at this time.