For our November lecture, Trinity College space weather scientist Dr Sophie Murray looked at solar flares, coronal mass ejections, and auroras. All this is called space weather, and she discussed its impact on the Earth’s upper atmosphere, and potentially on human civilisation. Dr Murray referred to the 1859 Carrington Event, which gave us the first alert that solar flares can interfere with our electronics. Since then solar flares have disrupted electricity grids, but no event of similar magnitude has yet occurred. Dr Murray and her colleagues are often called upon by industry and government to advise on how to protect today’s delicate electronics from the potentially catastrophic effects of solar flares. It is now a routine duty of Met Eireann and other meteorological services to forecast space weather.