About HEKI Kosuke
About Dep. of Natural History Sciences, Hokkaido Univ., Sapporo, JPN
About Geophysical Research Letters
About large earthquake
About earthquake precursor
About ionosphere
About The 2011 off the Pacific coast of Tohoku Earthquake
About The 2010 Chilean earthquake
About Sumatra earthquake 2004
About total electron content
About Seismic activity
About Ionosphere,thermosphere
About 東北沖地震
About 電離層
About 電子
About 増強