Okinawa Institute of Science and Technology (OIST)

Ancient Solar Proton Event Uncovered Through Tree Rings and Historical Records

Scientists have discovered evidence of a significant solar proton event that occurred between 1200 and 1204 CE, which was recorded in tree rings and the diary of a Japanese poet, providing valuable insights into the sun's activity during that period. This finding has major implications for our understanding of space weather and its potential impact on astronauts and spacecraft.