The stability of inviscid incompressible flows between concentric cylinders is considered here. For pure axial flows with velocity (0, 0, W(r)) it is proved that the growth rate tends to zero as the wave length tends to ...

Observations of tweeks with higher harmonics (n > 1) at low latitude stations Allahabad and Nainital, in the Indian sector, during the total solar eclipse on 22 July 2009, are presented. Allahabad and Nainital stations ...

This article delineates preliminary results obtained from three newly set up very low frequency (VLF) radio receiver observation stations at low latitude Indian sites Allahabad (16.49°N), Nainital (20.48°N) and Varanasi ...

[1] The present work investigates the reverse equatorial electrojet signature seen in the Ørsted satellite data, during magnetically quiet conditions. We found that whenever the satellite sees the reverse electrojet signature ...

The magnetic field near the earth contains contribution from three major sources, viz., main internal field that is due to electric currents in the outer core (97-99%), crustal field (1-2%), and external field (1-2%). The ...

The discrete VLF chorus emissions recorded at low latitude ground station Jammu (geomag. lat. = 22°26′N, L = 1.17) are reported and their characteristics based on spectral analysis have been carried out. These discrete ...

The propagation features of magnetohydrodynamic (MHD) disturbances along the ionosphere are considered from a theoretical point of view. Special attention is paid to the possibility of ionospheric propagation of disturbances ...

The H ranges at the equatorial electrojet locations Ancon, Peru and Trivandrum, India, show substantial periodicities in the 2-20 day range which are absent in solar flux , and hence, should be attributed mainly to planetary ...

Using the observed VHF scintillations at equatorial and anomaly crest stations in India during the years 1987-1989, an empirical model is developed. The model employs the cubic spline technique to reproduce the variation ...