@article{Hayakawa_2012 author = {Masashi Hayakawa and Y. Hobara and A. Rozhnoi and M. Solovieva and K. Ohta and J. Izutsu and T. Nakamura and Y. Yasuda and H. Yamaguchi and Y. Kasahara}, title = {THE IONOSPHERIC PRECURSOR TO THE 2011 MARCH 11 EARTHQUAKE AS BASED ON THE JAPAN-PACIFIC SUBIONOSPHERIC VLF/LF NETWORK OBSERVATION}, journal = {Telecommunications and Radio Engineering}, issn = {0040-2508}, year = {2012}, volume = {71}, number = {18}, pages = {1687--1706} }