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 venue for ISEA 17 is the University of Costa Rica – Guanacaste Campus (Sede de Guanacaste), located at Barrio El Capulín, Liberia, Guanacaste, Costa Rica, along National Route 21, just minutes south of downtown Liberia.
Google Maps: https://maps.app.goo.gl/8SobstnP3gRLuygp8

The call for abstracts has been closed on August 31, 2025. The call for travel support application has been closed on July 31, 2025. 

Registration is open under https://www.iap-kborn.de/isea17/registration. 

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).