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Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.41 [2012] >
IJRSP Vol.41(3) [June 2012] >
| Title: | Response of ionospheric foF2 over south east Asian sector to geomagnetic storm of 29 October 1973 |
| Authors: | David, T W
Chukwuma, V U |
| Keywords: | Geomagnetic storm
Moderate storm
Solar wind
Auroral electrojet index
Ionospheric storm response
Interplanetary magnetic field
Magnetic index (Dst) |
| Issue Date: | Jun-2012 |
| Publisher: | NISCAIR-CSIR, India |
| PACS No.: | 94.20.Vv; 96.50.Bh |
| Abstract: | The auroral electrojet (AE) index was employed for the study of the
ionospheric response to the geomagnetic storm of 29 October 1973. The
interplanetary magnetic field (IMF) component, Bz, and the low latitude
magnetic index, Dst, show that the event is a moderate (Dst = -64 nT, Bz = -5.8
nT) storm. The analysis from the disturbances in ionospheric foF2 during 29-31
October 1973 shows predominantly an enhancement (positive storm) at the mid and
low latitude stations. In between the time of storm (14:00 hrs UT on 29 October
and 05:00 hrs UT on 30 October), the upper latitudes also show some degree of
enhancement. This paper concludes that the reason for the observed positive
ionospheric storm over all latitudes under investigation could be due to
injection of energy from the solar wind into the auroral region as a result of
significant increase in the AE index which causes an uplift of the ionospheric
layers to higher altitudes, where the recombination rate is small. Furthermore,
this paper confirms the argument that moderate magnetic storms are capable of
generating ionospheric storms which are of comparable magnitude with those
resulting from intense geomagnetic storms. |
| Page(s): | 332-338 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.41(3) [June 2012]
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