SN1987A
I'm reminded of how the underground proton-decay detection experiments became, for a few seconds, crude "neutrino telescopes" when the wavefront arrived from that supernova in the Greater Magellanic Cloud. [More here]
Granted, there are thousands of seismometers in place around the planet . . . but if there weren't, we might still have usable data to analyze from those wells.
Like you said: a fine science fair project.