The only one I could see that was close was the last one in the screencap. For McLaren Vale (which, I guess is around 25km south from adelaide) there was a flare that was Mag 0.1, and brighter if the original OP was west of that point. It would have appeared in the SSW at 6:56pm. It's been a while since I observed Iridium flares - I assume the 50 Degrees is the point of greatest magnitude?
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