i started a new save file afterwards since i felt i was missing a lot of the events, and around day 2 or 3 i suddenly couldn't pause and there were 2 pings on the radar moving around eachother in a circle, it was storming at night so it was very hard to see, but i still decided to investigate
i then encountered this giant ball of light with smaller ones quickly orbiting around it, it moved somewhat sporadically but often in a straight line, and it went towards the green cabinet on the bottom right side of the map before zapping it and disappearing
during this event, i also heard random bursts of lightning striking constantly, seemingly at random
i managed to take several photos of it with the digital camera and they all came out super grainy, my character started coughing so i assume it must've been emitting radiation or something, since i was otherwise never near anything else that was radioactive nor was i smoking
i encountered it a second time during the day, but that time it was instead extremely foggy, to the point that i could barely see a few meters in front of me, i wasn't able to record it or get any screenshots that time because of it
Viewing post in 0.8 discoveries (SPOILERS)
I took cancer meds shortly before this... ball lightning? event and immediately started coughing again after it hung out right over my base for a long time, I'm fairly certain it's radioactive unless I somehow passed too close to the barrels in the far river without realizing it (no smoking either)- might be other cancer causing events too though I guess.
Also if Nose sees this and it is radiation artifacting, radiation grain in photos is actually grains of pure R, G, and B sensor being set off, not white- the radiation is too small to hit multiple parts of the sensor at once and cameras don't have a "white" sensor- it's a nitpick but it might serve the more overly-analytical players to know that it's not an electrical interference but radioactive