ガンマ線
The main research activities of this department includes study on solar-terrestrial environment including solar disturbances, Earth's magnetosphere, ionosphere, thermosphere, lithosphere, atmosphere etc. Peoples also work on seismo-ionospheric precursors, lithosphere-atmosphere-ionosphere coupling processes, long-term and transient solar activity and ionospheric climatology using both ground and space based VLF receiver. Monitoring of galactic X-ray transients, Soft Gamma ray Repeaters (SGRs) and Gamma Ray Bursts (GRBs) etc. are also active research topic in this department.