Prompt Cast
1991 Ultrahigh Energy Cosmic Ray Near Utah Stirs Non-Proton Origin Debate
Generated on April 15, 2026
TLDR On October 15, 1991, a powerful cosmic ray with energy exceeding an exa-electron volt struck Utah, prompting scientific discussions and studies on its mysterious non-proton origins.
Timestamped Summary
00:00
A cosmic ray detected in Utah on October 15th, 1991 had more energy than anything observed before.
02:14
On October 15th, 1991, a cosmic ray in Utah had unprecedented energy.
04:25
A cosmic ray event on October 15th, 1991, in Utah generated an unprecedented amount of high-energy particles.
06:37
A cosmic ray event in Utah on October 15, 1991 produced an ultrahigh energy particle with 320 exa-electron volts.
09:01
A cosmic ray event in Utah on October 15, 1991 produced an ultrahigh energy particle observed as it approached near-light speed.
11:39
A cosmic ray observed near Utah with energy over an exa-electron volt led to debates and studies on possible non-proton origins like neutron stars.
13:48
A cosmic ray near Utah over an exa-electron volt caused debates about non-proton origins like neutron stars.
