div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentusgs-depar-unite-of-the-interior-state-sl-geological-survey-magnetic-contours-showmehtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: USGS · DEPAR UNITE OF THE INTERIOR STATE SL GEOLOGICAL SURVEY Magnetic contours showme total intensity macnetac field of the earth an gammas reloUve to arbitrary datum loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsusreader034viewer20220502195f65017c076345537c459410html5thumbnails1jpg width=140 height=200 divdiv