All the ones I see are reactors through water shielding, in which case you’d be fine.
If you see a noticeable cherenkov effect from something that close that wasn’t heavily shielded by something like water, your camera sensor will likely be destroyed and you’d be dead pretty soon.
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A general rule of thumb is that if something is glowing blue or has a blue halo around it, you should run in the opposite direction.
Unless you saw it from really close, in which case it's too late and you should probably relax, sit down, have a drink, call your loved ones...
Or unless it's in water, in which case you're actually probably fine.
Short of LINAC irradiator ride-through videos on YouTube, are there any photos of this effect in air from a point source?
Astronauts have reported having difficulty sleeping due to cosmic-ray-induced Cherenkov flashes in their eye bulbs.
All the ones I see are reactors through water shielding, in which case you’d be fine.
If you see a noticeable cherenkov effect from something that close that wasn’t heavily shielded by something like water, your camera sensor will likely be destroyed and you’d be dead pretty soon.
In that case, I'm afraid your phone possibly won't function