Open AccessResponse of the Midlatitude F2 Layer to Some Strong Geomagnetic Storms during Solar Minimum as Observed at Four Sites of the Globe
Author(s) -
Vitaly P. Kim,
V. V. Hegai
Publication year - 2015
Publication title -
journal of astronomy and space sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.273
H-Index - 11
eISSN - 2093-5587
pISSN - 2093-1409
DOI - 10.5140/jass.2015.32.4.297
Subject(s) - ionosonde , solstice , ionosphere , geomagnetic storm , middle latitudes , storm , equinox , atmospheric sciences , southern hemisphere , northern hemisphere , f region , earth's magnetic field , solar minimum , geology , climatology , latitude , solar cycle , solar wind , geodesy , geophysics , physics , electron density , magnetic field , oceanography , quantum mechanics , electron
In this study, we documented the midlatitude F2-layer response to five strong geomagnetic storms with minimum Dst\ud< –150 nT that occurred in solar minimum years using hourly values of the F2-layer critical frequency (foF2) from four\udionosondes located in different hemispheres. The results were very limited, but they illustrated some peculiarities in the\udbehavior of the F2-layer storm. During equinox, the characteristic ionospheric disturbance patterns over the Japanese\udstation Wakkanai in the Northern Hemisphere and the Australian station Mundaring in the Southern Hemisphere were\udconsistent with the well-known scenario by Prölss (1993); however, during a December solstice magnetic storm, both\udstations did not observe any noticeable positive ionospheric disturbances. Over the “near-pole” European ionosonde, clear\udpositive ionospheric storms were not observed during the events, but the “far-from-pole” Southern Hemisphere station Port\udStanley showed prominent enhancements in F2-layer peak electron density in all magnetic storms except one. No event\udproduced noticeable nighttime enhancements in foF2 over all four ionosondes