, Hayakawa Institute of Seismo Electromagnetics Co. Ltd., Chofu, Tokyo, Japan; University of Electro-Communications, Chofu, Tokyo,, Japan

• Annals of Geophysics Vol. 58 No. 5 (2015) - Physics of the Atmosphere
  Ionospheric perturbations related to the earthquake in Vrancea area on November 22, 2014, as detected by electromagnetic VLF/LF frequency signals
  Abstract  PDF