div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader030vdocumentssitereader030viewer20220312015bb9877f09d3f28f6c8c3a8chtml5page1jpg target=_blank img data-url=-edited-by-oda-nishimura-and-sakurai-terra-scientific-publishing-company-tokiohtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: · Edited by Oda Nishimura and Sakurai Terra Scientific Publishing Company Tokio 1988 IUGG: Association of Geomagnetism and Aeronomy International Service of Geomagnetic Indices loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentssitereader030viewer20220312015bb9877f09d3f28f6c8c3a8chtml5thumbnails1jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imagea href=https:reader030vdocumentssitereader030viewer20220312015bb9877f09d3f28f6c8c3a8chtml5page2jpg target=_blank img data-url=-edited-by-oda-nishimura-and-sakurai-terra-scientific-publishing-company-tokiohtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: · Edited by Oda Nishimura and Sakurai Terra Scientific Publishing Company Tokio 1988 IUGG: Association of Geomagnetism and Aeronomy International Service of Geomagnetic Indices loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentssitereader030viewer20220312015bb9877f09d3f28f6c8c3a8chtml5thumbnails2jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imagea href=https:reader030vdocumentssitereader030viewer20220312015bb9877f09d3f28f6c8c3a8chtml5page3jpg target=_blank img data-url=-edited-by-oda-nishimura-and-sakurai-terra-scientific-publishing-company-tokiohtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: · Edited by Oda Nishimura and Sakurai Terra Scientific Publishing Company Tokio 1988 IUGG: Association of Geomagnetism and Aeronomy International Service of Geomagnetic Indices loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentssitereader030viewer20220312015bb9877f09d3f28f6c8c3a8chtml5thumbnails3jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imagea href=https:reader030vdocumentssitereader030viewer20220312015bb9877f09d3f28f6c8c3a8chtml5page4jpg target=_blank img data-url=-edited-by-oda-nishimura-and-sakurai-terra-scientific-publishing-company-tokiohtmlpage=4 data-page=4 class=ts-thumb lazyload alt=Page 4: · Edited by Oda Nishimura and Sakurai Terra Scientific Publishing Company Tokio 1988 IUGG: Association of Geomagnetism and Aeronomy International Service of Geomagnetic Indices loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentssitereader030viewer20220312015bb9877f09d3f28f6c8c3a8chtml5thumbnails4jpg width=140 height=200 adivdiv