[PEM12-P20] Solar 27-day rotational period detected in a wide-area lightning activity in Japan
★Invited papers
*Hiroko Miyahara1, Toshio Terasawa2, Ryuho Kataoka3, Mitsuteru Sato4, Yukihiro Takahashi4 (1.Humanities and Sciences/Museum Carriers, Musashino Art University, 2.RIKEN, 3.National Institute of Polar Research, 4.Hokkaido Univ.)