Research on Co-Seismic Ionospheric Disturbance due to the Nepal MW 7.8 Earthquake Based on GPS TEC
Abstract In this paper, we calculate the ionospheric TEC disturbance caused by the 2015 MW7.8 Nepal earthquake and analyze the FFT spectrum based on GPS observation data to research temporal and spatial characteristics of earthquake ionospheric TEC. The results show that obvious abnormal disturbance appears 5 minutes after earthquake and lasts more than 6 minutes with a trend of increasing-decreasing-increasing. The disturbance propagates towards east, northeast and several directions, whose velocities are 2 336.36 m/s and 455.52-937.64 m/s. The center frequencies are mostly 3-7 mHz, which is consistent with the disturbance spectrum caused by Rayleigh wave and acoustic wave.
Key words :
GPS TEC
Nepal earthquake
co-seismic ionospheric disturbance
spectrum analysis
Cite this article:
MA Yu,ZHU Fuying. Research on Co-Seismic Ionospheric Disturbance due to the Nepal MW 7.8 Earthquake Based on GPS TEC[J]. jgg, 2020, 40(9): 957-961.
MA Yu,ZHU Fuying. Research on Co-Seismic Ionospheric Disturbance due to the Nepal MW 7.8 Earthquake Based on GPS TEC[J]. jgg, 2020, 40(9): 957-961.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2020/V40/I9/957
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