On October 9, 2022, 15:21 CET, many satellites orbiting the Earth and in interplanetary space recorded the strongest gamma-ray burst (GRB) ever observed. Among these, the European Space Agency's (ESA) International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has also detected an extremely intense and long-lasting gamma-ray flux. At the same time, the CSES-01 (China Seismo-Electromagnetic Satellite) satellite, a collaboration between the Italian Space Agency (ASI) and the Chinese Space Agency (CNSA), recorded a macroscopic perturbation of the electric field in the upper part of the ionosphere, the highest and tenuest layer of the Earth's atmosphere, due to a sudden, strong current. Such an effect had never been observed in this layer of the atmosphere. Such perturbations in the ionosphere are usually associated with energetic events related to the activity of the Sun, but in this case the coincidence with the arrival of the gamma-ray burst indicates that the origin is to be found much further away, in the explosion of a star almost two billion light years away. The results of the analysis, conducted by an Italian-led multidisciplinary team that managed to synthesize data from two very different disciplines - gamma-ray astronomy and the search for interactions between the Sun, Earth and the cosmos - are published in Nature Communications.