Possible ionospheric anomalies associated with the 2009 M w 6.4 Taiwan earthquake from DEMETER and GNSS TEC
作者： Abdur Rafeh Abbasi , Munawar Shah , Arslan Ahmed , Najam Abbas Naqvi
DOI: 10.1007/S40328-020-00325-1
关键词: TEC 、 Geomagnetic storm 、 Ionosphere 、 GNSS applications 、 Satellite 、 Geology 、 Epicenter 、 Lithosphere 、 Geodesy 、 Total electron content
摘要: The recent advances in satellite based ionosphere monitoring provided more evidence about earthquake (EQ) precursors from lithosphere coupling mechanism. In this paper, we investigate ionospheric anomalies associated with the December 19, 2009, Taiwan EQ (Mw = 6.4), that occurred on UT = 13:02 h. Seismo are evaluated during 31 days (20 day before followed by 10 after EQ) data of French Satellite Detection Electro-Magnetic Emissions Transmitted Earthquake Regions (DEMETER) and validated from Global Navigation System (GNSS) retrieved Total Electron Content (TEC). time values ISL (Langmuir Probe) IAP (Ion Analyzer) DEMETER point to significant perturbations within 5 days day. Moreover, GNSS stations International Service (IGS) preparation zone also validate anomalies in prior/after Mw 6.4, EQ. spatial temporal analyses daily indices simultaneous enhancement electron density, ion temperature TEC related main shock quiet geomagnetic storm (Dst < − 30 nT, Kp ≤ 3). All these aids promoting the lithosphere- ionosphere coupling over epicenter 6.4 period TEC.
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