Japan Geoscience Union Meeting 2019

Presentation information

[E] Oral

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM15] Study of coupling processes in solar-terrestrial system

Thu. May 30, 2019 9:00 AM - 10:30 AM A01 (TOKYO BAY MAKUHARI HALL)

convener:Mamoru Yamamoto(Research Institute for Sustainable Humanosphere, Kyoto University), Yasunobu Ogawa(National Institute of Polar Research), Satonori Nozawa(Institute for Space-Earth Environment Research), Akimasa Yoshikawa(Department of Earth and Planetary Sciences, Kyushu University), Chairperson:Mamoru Yamamoto

9:45 AM - 10:00 AM

[PEM15-04] Development of MAGDAS project: Search for global electromagnetic coupling from polar to equatorial ionosphere

*Akimasa Yoshikawa1, Taisei Kabasawa2, Teiji Uozumi3, Akiko Fujimoto4, Shuji Abe3 (1.Department of Earth and Planetary Sciences, Kyushu University, 2.Graduate school of Sciences, Kyushu Univerity, 3.International center for Space weather science and education, Kyushu University, 4.Kyushu Institute of Technology)

Keywords:global electromagnetic coupling, Pc2 pulsation, Magnetosphere-ionosphere Coupling

The equatorial ionosphere is a final destination of electromagnetic energy brought about by energy incidence to the polar ionosphere. Distribution of geomagnetic disturbance accompanying such a coupling phenomenon shows strong asymmetry. Such an aspect suggests that the magnetosphere-ionosphere form a unique transmission and / or propagation system depending on each event.
The MAGDAS project investigates such a global electromagnetic coupling system by combining global geomagnetic field network observation with electric field observation using ionosonde installed at low and dip-equator region.
Recently, by using 250Hz sampling and 10Hz averaged MAGDAS 9 magnetometer data, we found that when the auroral substorm were enhanced during geomagnetic storm, together with enhancement of Pc1 wave at the polar region, the global Pc2 type disturbances (period range from 5 to 20 sec) can be captured from polar to equatorial region. In this talk, we will present recent update of MAGDAS project and of which scientific results.