| Abbreviation | Definition |
|---|---|
| GLA20 | Electrical Effects of Auroras at the Earth's Surface |
| GLA22 | Geophysics Luminous Aurora-like Phenomena: Black Auroras |
| GLA23 | Geophysics Luminous Aurora-like Phenomena: Banded Skies |
| GLA24 | Geophysics Luminous Aurora-like Phenomena: Millisecond Brightness Pulsations of the Night Sky |
| GLA25 | Geophysics Luminous Aurora-like Phenomena: False Dawn |
| GLA26 | Geophysics Luminous Aurora-like Phenomena: Auroras Following Coastlines |
| GLA27 | Challenges to the Theory of Aurora Origin |
| GLA28 | Geophysics Luminous Aurora-like Phenomena: Flash Auroras |
| GLA29 | Possible Atmospheric-laser Emission Accompanying Auroras |
| GLA3 | Auroral Meteors: Moving Luminous Patches and Bands |
| GLA30 | Geophysics Luminous Aurora-like Phenomena: Mysterious Bright Streaks in the Sky |
| GLA31 | Geophysics Luminous Aurora-like Phenomena: Short-lived, Bright, Cloud-like Patches High in the Sky |
| GLA4 | Low-Level Auroras |
| GLA5 | Geophysics Luminous Aurora-like Phenomena: The Odor of the Aurora |
| GLA6 | Artificial Low-Level Auroras |
| GLA7 | Geographically Displaced Auroras |
| GLA8 | Auroras with Unusual Geometries |
| GLA9 | Auroras Correlated with Thunderstorms |
| GLB | Geophysics Luminous Ball lightning phenomena |
| GLB1 | Ordinary Ball Lightning |