Conjugativity of magnetic substorms within middle latitudes of the northern and southern hemispheres
|1Yaremenko, LN, 1Mozgovaya, TA |
1S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
|Kosm. nauka tehnol. 2004, 10 ;(5-6):100-105|
|Publication Language: Russian|
he first attempts to distinguish conjugated sites of substorms within the northern and southern hemispheres revealed that it was not a point but an area, which is narrow in the latitudinal direction and distant in the longitudinal one. The area does not coincide with conjugated sites detected by whistles. According to data of observatories in the southern part of the Indian Ocean PAF, CZT and AMS, conjugated areas are chosen for each substorm from many European observatories situated on the same magnetic meridian. For PAF, at a quiet magnetic period conjugated area is detected near NUR or some northward, sometimes it is stretched up to LOV or BFE. During magnetic storms when PAF is subjected to the southern polar flow or occurs southwards from its central line, the area conjugated with PAF in the north is situated near TRO, northward of SOD. The shift along L-shells is 4. Conjugated area with AMS in the case of slightly disturbed field may occur near BEL, NGK, WNG, at a quieter period near KIV or more eastward. Conjugated area with CZT is located near BUD, NCK, FUR, or in the case of very quiet conditions it can only be supposed in Greece or Turkey. In that case the current of substorm weakens very slowly in latitudinal direction, its intensity in NCK and ТАМ differs by 20–30 %. In America conjugated area with the station Academician Vernadsky is situated between FRD and OTT, moving along the latitude depending on magnetic activity. Conjugated area within the Australian-Far Eastern region is situated near ASP и STA, and the area conjugated with MMB is located in the region of CNB. Far Eastern region is specific by its instability. The intensities of substorm in Australia and Japan may change more than twofold in a short time.