Turkish Journal of Engineering

Yazarlar: Erdinç TİMUÇİN, Selma ERAT

Konular:Mühendislik

DOI:10.31127/tuje.572457

Anahtar Kelimeler:Space Weather Events,Horizontal Components of Magnetic Field,Geomagnetically Induced Current,Magnetometer

Özet: In this study, the time derivatives of the horizontal geomagnetic field components were computed to estimate the geomagnetically induced current (GIC) over Turkey during space weather events and the results were compared with the geomagnetic activity indices. The interplanetary magnetic field (IMF) index, disturbance storm time (Dst) index, global geomagnetic activity indices (ap and Kp) were used as indicator of space weather events. Two different space weather events that occurred on 20-26 June 2015 and 06-10 September 2017 are analyzed. The data of the horizontal magnetic field components used in the analysis are obtained from İznik magnetic observatory (40.5⸰N, 29.7⸰E). During space weather event on 20-26 June 2015, the maximum (max.) value of the time derivative (dX/dt and dH/dt) of the X and H horizontal magnetic field components were calculated as 72,22 nT/min. and 74,40 nT/min., respectively, while during space weather event on 06-10 September 2017, the max. value of the time derivative of the X and H horizontal magnetic field components were calculated as 36,90 nT/min. and 38,12 nT/min., respectively. Also, it was observed that the strength of the local geomagnetic disturbance and amplitude of dX/dt and dH/dt at the observatory station depend strongly on the characteristics of geomagnetic activity indices during the space weather events. The southward IMF Bz component induces larger amplitude of dX/dt and dH/dt. The results indicate that the possibility of GIC occurrence over Turkey is quite high. Therefore, we strongly believe that further investigation and experimentation on GIC activity for Turkey is important.

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