So I’m assuming that we were caught out in the penumbra of the blast? Was it a blast from an interstellar object that was extremely far away? I’m just saying this because I thought that Gamma-Ray Bursts were easily capable of being extinction events under a direct hit.
I only took Astronomy 101, so I can’t answer you intelligently.
I thought they were only short in duration, yet extremely powerful.
I’m going to do some looking around.
https://imagine.gsfc.nasa.gov/science/objects/bursts1.html
https://www.space.com/gamma-ray-burst.html
I’m still confused and looking around for more information.