The KM3NeT colloboration just announced the detection of the highest energy neutrino event ever detected (~ 200PeV, that is peta-electronvolt!). The event was recorded on 13 February 2023 at 01:16:47 UTC.
The event (and the KM3NeT detector) has been described in an international press conference: https://www.youtube.com/live/pBBJIeOVLXE?si=dmLgXi8TsgWjxIcu
The paper has been published in Nature: Observation of an ultra-high-energy cosmic neutrino with KM3NeT | Nature
This exciting event has been added to Astro-COLIBRI: Astro-COLIBRI
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Yes, it is a very impressive level of energy that has been observed. Will KM3NeT be a new source of targets for AstroColibri, even when cosmological neutrino are generated by interaction of high velocity proton and CMB photon ? So such neutrino cannot give the position of the exact position of the event that was the source of proton.
Absolutely! As soon as the collaboration releases their recorded events in a timely fashion, we’ll add them to Astro-COLIBRI. Our hope is that this will happen this year 
To learn more about this event, its potential origin and how it fits (or rather doesn’t fit) into existing neutrino observations: check out our podcast. The first episode is live now, more coming over the next days.
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