Publication Date:
2017-04-04
Description:
Cross-spectral analysis of ULF wave measurements recorded at ground magnetometer
stations closely spaced in latitude allows accurate determinations of
magnetospheric field line resonance (FLR) frequencies. This is a useful tool for remote
sensing temporal and spatial variations of the magnetospheric plasma mass density. The
spatial configuration of the South European GeoMagnetic Array (SEGMA, 1.56 〈 L 〈
1.89) offers the possibility to perform such studies at low latitudes allowing to monitor the
dynamical coupling between the ionosphere and the inner plasmasphere. As an example of
this capability we present the results of a cross-correlation analysis between FLR frequencies
and solar EUV irradiance (as monitored by the 10.7-cm solar radio flux F10.7)
suggesting that changes in the inner plasmasphere density follow the short-term (27-day)
variations of the solar irradiance with a time delay of 1–2 days. As an additional example
we present the results of a comparative analysis of FLR measurements, ionospheric vertical
soundings and vertical TEC measurements during the development of a geomagnetic
storm.
Description:
Published
Description:
25-27
Description:
1.6. Osservazioni di geomagnetismo
Description:
1.7. Osservazioni di alta e media atmosfera
Description:
3.9. Fisica della magnetosfera, ionosfera e meteorologia spaziale
Description:
JCR Journal
Description:
reserved
Keywords:
ULF waves
;
Field line resonance
;
Remote sensing
;
Solar activity
;
Plasmasphere
;
Ionosphere
;
01. Atmosphere::01.02. Ionosphere::01.02.02. Dynamics
;
01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics
;
01. Atmosphere::01.03. Magnetosphere::01.03.03. Magnetospheric physics
;
05. General::05.07. Space and Planetary sciences::05.07.01. Solar-terrestrial interaction
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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