July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Forbush decrease precursors observed using GRAPES-3

Aug 4, 2015, 4:00 PM
1h
Theater Foyer (World Forum)

Theater Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 4
Poster contribution SH-EX Poster 3 SH

Speaker

ARUNBABU Kollamparambil Paul (Tata Institute of Fundamental Research, Mumbai, India)

Description

Earth-directed Coronal mass ejections (CMEs) emanating from the Sun and the shock associated with it are the primary drivers of space weather disturbances. Forbush decrease precursors are advance warning of these upcoming magnetic field disturbances. GRAPES-3 tracking muon telescope which is a part of GRAPES-3 experiment located in Ooty, India, provides high statistics measurement of the muon flux with good temporal resolution. In this study we are using data from GRAPES-3 muon telescope and making use of its multidirectional observations to study the Forbush decrease precursors in greater detail. We have identified few Forbush decrease precursor signatures in muon flux well before the arrival of the actual shock. We use these Forbush decrease precursors to study the characteristics of magnetic field compression associated with the upcoming CME shock-sheath system.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 37

Primary author

ARUNBABU Kollamparambil Paul (Tata Institute of Fundamental Research, Mumbai, India)

Co-authors

Dr A. Oshima (College of Engineering, Chubu University, Kasugai, Aichi, Japan) Prof. H. M. Antia (Tata Institute of Fundamental Research, Mumbai. India) Dr PRASAD SUBRAMANIAN (Indian Institute of Science Education and Research, Pune, India) PRAVATA MOHANTY (Tata Institute of Fundamental Research, Mumbai, India) Prof. S. KAWAKAMI (Graduate School of Science, Osaka City University, Osaka, Japan) Shashi Dugad (Tata Inst. of Fundamental Research (IN)) Prof. Sunil K. Gupta (Tata Institute of Fundamental Research, Mumbai, India) Prof. Y. Hayashi (Graduate School of Science, Osaka City University, Osaka, Japan)

Presentation materials