Journal of Geomagnetism and Geoelectricity, Volume 19

absorption altitude amplitude analysis andesite annealing auroral basalt calculated coefficients components computed convection cooling core Curie point Curie temperature decrease demagnetization dipole distribution drift velocity earth's earthquake effect electric field electrojet electron density emissions energy equation estimated experimental ferrimagnetic Figure flux frequency Geoelectr Geomag geomagnetic field Geophys Geophysical given heating height increase intensity ionization ionosphere Japan kc/s latitude lavas layer lightning discharge magnetic field magnetic minerals magnetic properties magnetite magnetographs maximum measured motion Nagata non-dipole field NRM-TRM curve observatory observed obtained Ondoh oscillations oxidation Ozima paleomagnetic Phys polarity potential gradient propagation pyrrhotite radio remanent magnetization reversed Rikitake RISRJ rocket rocks rotation samples saturation magnetization secular variation shown in Fig shows specimens spectrum spherical harmonic sunspot surface Table Thellier thermal treatment thermomagnetic tion titanomaghemite Tokyo University values variometer vertical Vestine waveforms waves westward drift whistler Yukutake