Rare Super Cyclone Phailin in the Indian Ocean: Analysis of VIIRS High-Resolution IR Images and 40 kHz Sferics Data

Abstract

VIIRS high-resolution infrared (IR) images of the rare super cyclone Phailin of the Northern Indian Ocean as well as 40 kHz sferics data as recorded over Kalyani have been analyzed in this paper with a view to investigate the characteristics of the super cyclone. The maximum IR brightness temperature in the eye of the cyclone was pretty warm and it was illuminated by airglow. The Phailin was one of the strongest cyclones with a peak estimated intensity of 140 kts. Our round-the-clock sferics data also reveals remarkable changes in the sferics record on October 10, 2013, when the super cyclone was active.

A comparative study of ELF and VLF noise characteristics of nor’wester at a low latitude tropical station

“…When a signal is transmitted from a satellite to the ground or vice versa, it must pass through the ionosphere. As the lower part of the ionosphere, changes rapidly during the sunset hours, ELF/VLF waves can provide us a very reliable and continuous means of monitoring the lower ionosphere and hence inferring communications outages which can be monitored by gamma ray bursts [17,18].…”