In a groundbreaking discovery, scientists have detected an unusually thick ozone layer at an altitude of around 21-23 kilometers over the North Bay of Bengal. This finding was part of the Phase-I NetRAD-ASMA campaign, a collaborative effort among Indian atmospheric research institutions. The concentration of ozone in this region was significantly higher than usual and persisted for more than a day. The unusual layer was detected using various instruments like atmospheric radars, weather balloons, satellites, and advanced atmospheric models. The Aryabhatta Research Institute of Observational Sciences (ARIES) played a key role in the observation process. Remarkably, this enhanced ozone layer was present both day and night, suggesting that sunlight-driven chemical reactions may not be the primary cause of its formation. Scientists are now investigating atmospheric convection, wind shear, horizontal transport, and vertical air movements as potential causes. The findings, published in Earth and Space Science by the American Geophysical Union, offer valuable insights into how atmospheric circulation can redistribute stratospheric ozone over the Indian subtropical region.