Results 31 to 40 of about 312 (156)
The quiet-time equatorial electrojet and counter-electrojet.
Journal of geomagnetism and geoelectricity, 1979 Using ground magnetometer data from several stations near the dip equator, the magnetically quiet-time characteristics of the daytime normal electrojet and the morning and afternoon counter-electrojets are established and illustrated. In particular, the solar cycle, seasonal, longitudinal and day-to-day variations of counter-electrojets as well as ...
MARRIOTT, R. T. +2 more
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Equatorial Counter-Electrojet and Magnetic Pulsations.
Journal of geomagnetism and geoelectricity, 1997 The signal amplitudes in the Hx component of magnetic pulsations undergo significant enhancement at the dip equator during intervals of Equatorial Electrojet (EEJ), the enhancement attaining a peak value during prenoon hours. On the other hand, it is shown in this study, that the enhancement peak which occurs during prenoon hours on EEJ days shifts ...
Sastry, T. S., Sarma, S. V. S.
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Formation and identification of counter electrojet (CEJ)
International Journal of Physical Sciences, 2013 This study investigates the possible occurrence of counter equatorial electrojet (CEJ) and a quicker method for identification of CEJ. Data from a chain of magnetic observatories of World Data Center for Geomagnetism in Tokyo, Japan, was employed. It is strikingly interesting to observe that most CEJ occurred from morning through new dusk, with almost ...
N Okeke Francisca +4 more
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The equatorial ionospheric response over Tirunelveli to the 15 January 2010 annular solar eclipse: observations [PDF]
Annales Geophysicae, 2012 In this paper we present a case study of the annular solar eclipse effects on the ionization of E and F regions of equatorial ionosphere over Tirunelveli [77.8° E, 8.7° N, dip 0.4° N] by means of digital ionosonde on 15 January 2010.
C. K. Nayak +4 more
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The QBO modulation of the occurrence of the counter electrojet
Geophysical Research Letters, 1995 Continuous hourly measurements of horizontal component of geomagnetic field obtained at Trivandrum, India, have been used to study the occurrence of the Counter Electrojet (CEJ). Because the data cover nearly three solar activity cycles, they can be used to investigate long‐term variations of the CEJ. After the data have been processed and detrented to
Pei‐Ren Chen, Yi Luo, Jun Ma
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Occurrence of blanketing Es layer (Esb) over the equatorial region during the peculiar minimum of solar cycle 24 [PDF]
Annales Geophysicae, 2014 A thin and highly dense sporadic E layer, which can occasionally block the upper ionospheric layers, is called blanketing sporadic E (Esb). We present the statistical seasonal local time occurrence pattern of Esb at equatorial station Tirunelveli (8 ...
V. Yadav +4 more
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Solar cycle dependent characteristics of the equatorial blanketing Es layers and associated irregularities [PDF]
Annales Geophysicae, 2006 The occurrence of blanketing type Es (Esb) layers and associated E-region irregularities over the magnetic equatorial location of Trivandrum (8.5° N; 77° E; dip ~0.5°) during the summer solstitial months of May, June, July and August has ...
C. V. Devasia, V. Sreeja, S. Ravindran
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Journal of Geophysical Research: Space Physics, 1983 The interrelationship of equatorial and planetary scale ionospheric horizontal currents on quiet days is studied by means of a global ionospheric wind dynamo simulation. This simulation aims at reproducing magnetic and radar data first for a normal quiet day, and then for the strong counterelectrojet event of January 21, 1977, which was previously ...
Hanuise, Christian +4 more
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Space Weather, Volume 24, Issue 7, July 2026.Abstract Soft proton contamination presents a persistent threat to the performance of space‐based X‐ray observatories such as ESA's upcoming Solar‐wind Magnetosphere Ionosphere Link Explorer (SMILE). This study develops a machine‐learning framework for modeling soft proton fluxes in the 92.2–159.7 keV range, tailored to SMILE's elliptical, highly ...
Simon Mischel +2 more
wiley +1 more source
Equatorial Counter Electrojet & Interplanetary Magnetic Field [PDF]
, 1981 1-15The characteristics of equatorial counter electrojet events associated with the reversal of the Bz component of interplanetary magnetic field (IMF) are discussed and compared with those of events associated with semi-diurnal luni-solar tides.
Rastogi, R G
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