Correlation between earthquake occurrence and the anomalous propagation of VHF radio waves indicated by the gain and the p-value of prediction maps produced by a simple objective algorithm at the Shimabara area, Kyushu, Japan

Sho Morita, Institute of Seismology and Volcanology, Hokkaido University, Sapporo, Japan, Masao Nakatani, University of Tokyo, Bunkyo-ku, Japan and Toru Mogi, Hokkaido University, Sapporo, Japan