Advances in aviation radiation mitigation were demonstrated during the Gannon storm

Abstract

A validation strategy for aviation radiation hazard mitigation has been completed using two commercial airline flights in 2024 and 2025. We review the strategy primary elements, including the emergence of aviation radiation awareness and collaborative efforts by global aviation and radiological bodies that established mitigation standards. The article highlights biological effects of radiation exposure influenced by altitude, latitude, and geomagnetic conditions, upon aircrew, frequent flyers, and commercial space travelers. It recognizes the SWAG user needs survey report that identifies the need for continuous monitoring and predictive models to ensure long-term occupational and public health safety. The ALARA strategy validation was completed using two UAL 990 flights on B777 200 aircraft between San Francisco and Paris. Each carried the same ARMAS FM7 radiation monitoring unit. One flight occurred during the Gannon storm May 10 and 11, 2024 and one flight occurred during quiet geomagnetic conditions June 8 and 9, 2025. The flight results validated the strategy during extreme space weather, i.e., apply operational controls for shielding to reduce dose. One approach is fly lower magnetic latitudes to gain more Earth magnetic field shielding and the other is fly lower altitudes to use atmosphere depth shielding. Both ALARA shielding methods are controllable in airline operations and air traffic management. This study shows the effectiveness to deviate flight paths to lower magnetic latitude routes and lower altitudes during major geomagnetic storms. Not only does this approach mitigate HF communication outages but it also reduces risks from increased GNSS errors for takeoff and landing navigation. Magnetic field shielding is a major risk reduction factor for radiation, communication, and navigation while altitude shielding reduces radiation hazard risks.