UA-1 Observing Planet Earth and the Space from Antarctica Recent developments in the Japanese Antarctic Research Expedition Space Revealing the mystery of aurora observed simultaneously in both hemispheres Syowa Station in Antarctica and Iceland Conjugate study on source mechanism of Unique pair for simultaneous auroral observation pulsating aurora Syowa Station and Iceland are connected by the same The pulsating aurora is a mysterious aurora that changes its geomagnetic fi eld line between southern and northern hemispheres. brightness and shape periodically like a pulse, with a frequency of Simultaneous auroral observations at these “geomagnetic between a few seconds and tens of seconds. Many new fi ndings conjugate points” are useful for studying the source mechanism of have been obtained so far on its conjugate and non-conjugate the aurora and variations in the environment around the Earth. features. Iceland Syowa Station Period Iceland and Syowa Station are connected by the same geomagnetic fi eld line. Simultaneous observation of pulsating aurora Conjugate study on evolution of auroral substorm Dynamic change of near Earth space Auroral and magnetospheric substorms are an important subject for many scientists in the world. The detailed evolution of an auroral substorm was observed simultaneously in both hemispheres over a long period for the fi rst time. Iceland Syowa Station Time Simultaneous observation of auroral substorm Social Auroral activity is closely related to variations in the environment around the Earth. Understanding auroral activity can contribute to the safe operation of various satellites (iridium, GPS, meteorological, contribution communications, etc.) as well as the International Space Station orbiting at the altitude of the aurora. National Institute of Polar Research Research Organization of Information and Systems, Inter-University Research Institute Corporation 10-3, Midori-cho, Tachikawa-shi, Tokyo 190-8518 Tel: +81-42-512-0655 Fax: +81-42-528-3105 http://www.nipr.ac.jp/english/ Email: [email protected] © National Institute of Polar Research, 2014.