ON METHODS OF GRAPHICAL DISPLAYING OF POLAR MAGNETIC DISTURBANCES

摘要

Some simple and useful methods of mapping the field of polar magnetic disturbances are discussed. Contour maps showing the storminess in a local time - universal time plane are used to trace the variation with time of the longitudinal extent and intensity of the auroral electrojets. In effect this kind of map is a way of ascribing to each longitude an index analogous to the AE index. For the study of north-south motions of the auroral electrojets during polar magnetic substorms contour maps are used showing the disturbances of the three field components in a latitude - universal time plane.