Fermi GBM detects a Terrestrial Gamma-ray Flash (TGF) with high confidence.
AI Summary
The event detected at 2026-08-28T13:54:42.59Z has been classified with certainty as a TGF, characterized by a burst intensity of 119 and significant likelihood probability of 100%. No further follow-up observations were noted.
Measurements
| Event ID | 809618087 |
|---|---|
| Source | Fermi GBM |
| Alert type | GRB |
| Significance | low |
| Trigger time (UTC) | Fri, 28 Aug 2026 13:54:42 GMT |
| Right ascension (J2000) | 244.7333° |
| Declination (J2000) | 57.2° |
| Position error radius | 30.6667° |
| GCN notices | 2 |
| GCN circulars | 0 |
Notices (1)
Fermi GBM — GRB · Fri, 28 Aug 2026 13:54:42 GMT
AI summary generated Fri, 04 Sep 2026 08:51:53 GMT.