EFFECT OF LOCAL TIME ON THE F2 -REGION RESPONSE TO THE GEOMAGNETIC STORM OF JANUARY 28, 1985

Abstract

The F2-region response to the storm of January 28, 1985, was investigated in this research using some ionospheric stations from East Asian and Euro-African sectors. The sectors were chosen because of their huge time difference, which enabled the proper identification of whether or not plasma is redistributed owing to sunrise effect when a storm occurs. The storm occurred around 14:00 universal time (UT), which corresponded with local time (LT) of Euro-African sector of between 1-4 p.m. and 10-11 p.m. of East Asian sector. From the result obtained, it was concluded that sunrise effect could redistribute the plasma when a geomagnetic storm occurs due to the fact that the three low latitude stations in Euro-African behaved in an undefined manner, while the response of the East Asian stations agreed with existing theories