.earth-magnetic-field1{width:166px; height:321px ;}
.earth-magnetic-field3{width:166px; height:321px ;}
.earth-magnetic-field2{width:147px; height:148px ;}
.earth-magnetic-field4{width:198px; height:402px ;}
.earth-magnetic-field5{width:116px; height:142px ;}