Local time behaviour of low frequency geomagnetic field fluctuation power at low latitude
In this paper we present a statistical study of the local time behaviour of low frequency (0.7-4.0 mHz) geomagnetic field fluctuation power at a low latitude station (corrected geomagnetic latitude 36.2°N). The analysis was conducted for two contiguous years during the ascending phase of the solar c...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2001-06-01
|
| Series: | Annals of Geophysics |
| Subjects: | |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3607 |
| _version_ | 1818031375942418432 |
|---|---|
| author | M. De Lauretis P. Francia S. Lepidi |
| author_facet | M. De Lauretis P. Francia S. Lepidi |
| author_sort | M. De Lauretis |
| collection | DOAJ |
| description | In this paper we present a statistical study of the local time behaviour of low frequency (0.7-4.0 mHz) geomagnetic field fluctuation power at a low latitude station (corrected geomagnetic latitude 36.2°N). The analysis was conducted for two contiguous years during the ascending phase of the solar cycle. We found that the power of the horizontal east-west geomagnetic field component shows a diurnal and seasonal variation which can be related to variations of the ionospheric current system (Sq) mainly produced by dynamo-action in the ionospheric E region. The power of the horizontal north-south geomagnetic field component is higher in the local afternoon with respect to the morning; this asymmetry is more evident during time intervals characterized by high solar wind dynamic pressure. |
| first_indexed | 2024-12-10T05:50:29Z |
| format | Article |
| id | doaj.art-eaad551479ad42578a83a34846f174ba |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-12-10T05:50:29Z |
| publishDate | 2001-06-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-eaad551479ad42578a83a34846f174ba2022-12-22T02:00:03ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2001-06-0144110.4401/ag-3607Local time behaviour of low frequency geomagnetic field fluctuation power at low latitudeM. De LauretisP. FranciaS. LepidiIn this paper we present a statistical study of the local time behaviour of low frequency (0.7-4.0 mHz) geomagnetic field fluctuation power at a low latitude station (corrected geomagnetic latitude 36.2°N). The analysis was conducted for two contiguous years during the ascending phase of the solar cycle. We found that the power of the horizontal east-west geomagnetic field component shows a diurnal and seasonal variation which can be related to variations of the ionospheric current system (Sq) mainly produced by dynamo-action in the ionospheric E region. The power of the horizontal north-south geomagnetic field component is higher in the local afternoon with respect to the morning; this asymmetry is more evident during time intervals characterized by high solar wind dynamic pressure.http://www.annalsofgeophysics.eu/index.php/annals/article/view/3607Geomagnetic pulsationMHD waves and instabilities |
| spellingShingle | M. De Lauretis P. Francia S. Lepidi Local time behaviour of low frequency geomagnetic field fluctuation power at low latitude Annals of Geophysics Geomagnetic pulsation MHD waves and instabilities |
| title | Local time behaviour of low frequency geomagnetic field fluctuation power at low latitude |
| title_full | Local time behaviour of low frequency geomagnetic field fluctuation power at low latitude |
| title_fullStr | Local time behaviour of low frequency geomagnetic field fluctuation power at low latitude |
| title_full_unstemmed | Local time behaviour of low frequency geomagnetic field fluctuation power at low latitude |
| title_short | Local time behaviour of low frequency geomagnetic field fluctuation power at low latitude |
| title_sort | local time behaviour of low frequency geomagnetic field fluctuation power at low latitude |
| topic | Geomagnetic pulsation MHD waves and instabilities |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3607 |
| work_keys_str_mv | AT mdelauretis localtimebehaviouroflowfrequencygeomagneticfieldfluctuationpoweratlowlatitude AT pfrancia localtimebehaviouroflowfrequencygeomagneticfieldfluctuationpoweratlowlatitude AT slepidi localtimebehaviouroflowfrequencygeomagneticfieldfluctuationpoweratlowlatitude |