Studying the polytropic behavior of an ICME using Multi-spacecraft observation by STEREO-A, STEREO-B, and WIND

K Ghag, P Pathare, A Raghav, G Nicolaou… - Advances in Space …, 2024 - Elsevier
The polytropic behavior describes the relationship between macroscopic properties of
plasma species and provides useful information in understanding physical mechanisms in …

The extreme solar and geomagnetic storms on 1940 March 20–25

H Hayakawa, DM Oliveira, MA Shea… - Monthly Notices of …, 2022 - academic.oup.com
In late 1940 March, at least five significant solar flares were reported. They likely launched
interplanetary coronal mass ejections (ICMEs), and were associated with one of the largest …

Observation of Alfvén ion cyclotron waves in icme magnetic clouds at 1 au

O Dhamane, V Pawaskar, A Raghav… - The Astrophysical …, 2023 - iopscience.iop.org
Waves in plasma play an essential role in the energy transfer and plasma-heating
processes. This article discusses the in situ observation of Alfvén ion cyclotron (AIC) waves …

Alfvénicity-related long recovery phases of geomagnetic storms: a space weather perspective

D Telloni, R D'Amicis, R Bruno, D Perrone… - The Astrophysical …, 2021 - iopscience.iop.org
This paper reports, for the first time on a statistical basis, on the key role played by the
Alfvénic fluctuations in modulating the recovery phase of the geomagnetic storms, slowing …

Properties of the recovery phase of extreme storms

K Choraghe, A Raghav, D Chakrabarty… - Journal of …, 2021 - Wiley Online Library
A geomagnetic storm is a phenomenon of weakening of Earth's magnetic field from a few
hours to several days, which directly or indirectly affects navigation, transportation …

Proton Temperature Anisotropy within the Interplanetary Coronal Mass Ejections Sheath at 1 au

ZI Shaikh, AN Raghav, IY Vasko - The Astrophysical Journal …, 2023 - iopscience.iop.org
The sheath plasma of interplanetary coronal mass ejections (ICMEs) is highly compressed,
heated, turbulent, and magnetically intense relative to the ambient solar wind. In this Letter …

Observation of Alfvén waves in an icme-hss interaction region

O Dhamane, A Raghav, Z Shaikh, U Panchal, K Ghag… - Solar Physics, 2023 - Springer
The Alfvén wave (AW) is the most common fluctuation present within the solar wind emitted
from the Sun. Whether or not AWs can originate after the collision of an Interplanetary …

Intense (SYM-H⩽-100nT) geomagnetic storms induced by planar magnetic structures in co-rotating interaction regions

K Choraghe, Z Shaikh, A Raghav, K Ghag… - Advances in Space …, 2023 - Elsevier
Abstract Generally, Co-rotating Interaction Region (CIR) induced geomagnetic storms are
weak to moderate in magnitude. Moreover, CIRs can also drive intense storms when they …

The role of extreme geomagnetic storms in the Forbush decrease profile observed by neutron monitors

K Ghag, P Tari, A Raghav, Z Shaikh… - Journal of Atmospheric …, 2023 - Elsevier
The Forbush decrease (FD) and Geomagnetic storm (GS) are the two distinct space weather
events having common causing agents like interplanetary coronal mass ejection (ICME) or …

Coexistence of a planar magnetic structure and an Alfvén wave in the shock-sheath of an interplanetary coronal mass ejection

ZI Shaikh, A Raghav, G Vichare - Monthly Notices of the Royal …, 2019 - academic.oup.com
The excess speed of coronal mass ejection over the ambient solar wind in interplanetary
space generates a highly compressed, heated and turbulent shock-sheath. Here, for the first …