TEC Global Map

Updates: Every 15 minutes

This map is generated by the ASWFC using the International Reference Ionosphere (IRI) model. The displayed map represents Total Electron Content (TEC) "climatology". It should not be relied on during geomagnetic disturbances. One TEC unit (TECU) is 10¹⁶ electrons/m².

You can access TEC images and data files from the past 24 hours here. The IRI model is driven by near real-time F10.7 solar flux and sunspot numbers. All other IRI model settings are at their default values.