The International Symposium on Equatorial Aeronomy (ISEA) is held once in every three to four years. Researchers from the fields of atmosphere, ionosphere and magnetosphere science come together in ISEA to share new results, discuss the current state-of-the-art, and identify promising topics for future research. The 17th International Symposium on Equatorial Aeronomy will be held in Liberia, Costa Rica from February 9 to 13, 2026. 

The call for abstracts is now open and lasts until July 31, 2025 including travel support applications and until August 15, 2025 for regular abstract submissions.  

We will be sharing regular updates regarding programme, registration, venue, and other pertinent information related to ISEA 17 at this webpage. 

ISEA17 will be followed by the United Nations/Costa Rica Workshop on Machine Learning applied to Space Weather and Global Navigation Satellite Systems in San José, Costa Rica between February 16-20, 2026 (https://www.unoosa.org/oosa/en/ourwork/psa/schedule/2026/united-nations-costa-rica-workshop-2026.html).