[P-EM13] Space Weather and Space Climate

[PEM13-P14] Travertine as a tool for investigating past extreme space weather events

*Hiroko Miyahara¹, Hongyang Xu², Kazuho Horiuchi³, Limin Zhou⁴, Hiroyuki Matsuzaki⁵ (1. Okinawa Institute of Science and Technology, 2. Hubei University, 3. Hirosaki University, 4. East China Normal University, 5. The University of Tokyo)

Keywords:Beryllium-10, Travertine, Solar proton event, Solar cycle