Japan Geoscience Union Meeting 2018

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[EE] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS03] Interdisciplinary studies on pre-earthquake processes

Thu. May 24, 2018 10:45 AM - 12:15 PM A09 (Tokyo Bay Makuhari Hall)

convener:Katsumi Hattori(Department of Earth Sciences, Graduate School of Science, Chiba University), Jann-Yenq Liu(Institute of Space Science, National Central University, Taiwan), Dimitar Ouzounov(Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA, 共同), Qinghua Huang(Peking University), Chairperson:Hattori Katsumi, Huang Qinghua(Peking University)

11:45 AM - 12:00 PM

[MIS03-11] Seismo-ionospheric precursors observed by Advanced Ionospheric Probe onboard FORMOSAT-5

*Jann-Yenq Liu1, Chi-Kuang Chao1 (1.Institute of Space Science, National Central University, Taiwan)

Keywords:FORMOSAT-5, Advanced Ionospheric Probe

FORMOSAT-5 launched on 24 August 2017 with a sun-synchronous orbit at 720 km altitude and 98.28 inclination, which passes at almost the same local time everywhere in the daytime of about 1030 LT and the nighttime of about 2230 LT. AIP (advanced ionospheric probe) on board FORMOSAT-5 has been observing the ion density, ion temperature, ion velocity, and electron temperature in nighttime, since 1 November 2017. FORMOSAT-5/AIP ion density and the global ionospheric map (GIM) of the total electron content (TEC) derived by ground-based GPS receivers are used to find ionospheric anomalies before the 11 November 2017 M7.3 Iran-Iraq Border Earthquake. It is found that in the epicenter area, FORMOSAT-5/AIP ion density and the GIM TEC significantly increase 7 - 9 days before the earthquake. Moreover, the increases in the ion density and the TEC imply that a eastward electric field generated during the preparation earthquake period is essential.