A long-term study on the variability of HILDCAA events and solar wind-magnetosphere coupling

• Grant number: 12/00280-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: August 01, 2012
• End date: September 30, 2015
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geophysics
• Principal Investigator: Ezequiel Echer
• Grantee: Rajkumar Hajra
• Host Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia e Inovação (Brasil). São José dos Campos , SP, Brazil
• Associated scholarship(s): 14/17986-9 - A long term study on the variability of HILDCAA events and solar wind-magnetosphere coupling, BE.EP.PD

Abstract

This project aims to study long term solar wind-magnetosphere coupling during HILDCAA events.In the proposed project an attempt will be made to derive a list of HILDCAAs for the period from 1957 to 2011. The time period (1957-2011) corresponds to five complete (11-year) solar cycles (19-23). The list can be utilized to study different statistical aspects of HILDCAAs, like the dependence of HILDCAAs on the solar cycle, solar activity phases and their annual/seasonal variations. There is also scope to study the variabilities, if any, in the characteristics of HILDCAAs - in terms of duration, peak intensity, integrated energy input, etc. - during different phases of solar activity and seasons. These characteristics can be compared for HILDCAAs preceded by geomagnetic storms and HILDCAAs not related to any geomagnetic storms.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SOUZA, A. M.; ECHER, E.; BOLZAN, M. J. A.; HAJRA, R.. A study on the main periodicities in interplanetary magnetic field Bz component and geomagnetic AE index during HILDCAA events using wavelet analysis. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, v. 149, p. 81-86, NOV 2016. (12/00280-0)

MENDES, ODIM; DOMINGUES, MARGARETE OLIVEIRA; ECHER, EZEQUIEL; HAJRA, RAJKUMAR; MENCONI, VARLEI EVERTON. Characterization of high-intensity, long-duration continuous auroral activity (HILDCAA) events using recurrence quantification analysis. Nonlinear Processes in Geophysics, v. 24, n. 3, p. 407-417, AUG 1 2017. (15/25624-2, 12/00280-0)