Story perspectives

New Camera Technique Reveals High Blue Aurora Altitudes

11/7/2025

47 9

Summary

Story summary

Researchers at the National Institutes of Natural Sciences in Tokyo developed a hyperspectral camera method to map blue aurora altitudes.
The technique yields precise altitude estimates for nitrogen molecular ions (N2+) during astronomical twilight.
In Kiruna, Sweden, on October 21, 2023, emissions peak at 200 kilometers, higher than the earlier 130 kilometers.
The finding challenges existing auroral models and the hyperspectral advance opens new avenues for understanding ionospheric dynamics.

1 of 1

Story summary

Researchers at the National Institutes of Natural Sciences in Tokyo developed a hyperspectral camera method to map blue aurora altitudes.
The technique yields precise altitude estimates for nitrogen molecular ions (N2+) during astronomical twilight.
In Kiruna, Sweden, on October 21, 2023, emissions peak at 200 kilometers, higher than the earlier 130 kilometers.
The finding challenges existing auroral models and the hyperspectral advance opens new avenues for understanding ionospheric dynamics.