ASY/SYM: [1981-]
Final AE: [1975 (AE & AL only), 1978-1987, and 1988/01-06]
Provisional AE: [1989/03 and 1990-]
The AE indices for 1988/07-12, 1989/01-02, and 1989/04-12
have not yet been derived.
Provisional AE index for July 2019 - December 2019 is now available.[January 5, 2024] Provisional AE index (to be updated in the future) for May 10-14 2024 are now available. [June 3, 2024]
The published digital values of real-time AE index are now available for download and plotting. (For periods where both provisional and real-time values are available, the provisional values will be utilized for download and plotting.) [May 13, 2025]