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One of the impacts of space weather activity is the attenuation of high frequency (HF) radiowaves in the ionosphere. HF radio technology is used in a wide range of industries for long-distance communications, and also for over-the-horizon radar systems. This talk will focus on a new application of the Super Dual Auroral Radar Network (SuperDARN) for measuring HF radio attenuation during space weather events. The method makes novel use of the radars' routine background HF noise measurements, which are required for the radar data processing but are not normally used for science applications. The SuperDARN dataset consists of more than 20 years of continuous observations, providing opportunities for long-term studies and real-time monitoring of HF radio wave absorption from middle to polar latitudes.