28 citations · 145 across the 13 of their papers we have counts for
13 papers
Low-Latitude Auroras: Insights from 23 April 2023 Solar Storm
Geeta Vichare, Ankush Bhaskar, Rahul Rawat +4
In April 2023, low-latitude aurora observation by the all-sky camera at Hanle, Ladakh, India ( geographic latitude (GGLat)) was reported, which stimulated a lot o…
AuroraMag: Twin Explorer of Asymmetry in Aurora and Solar Wind-Magnetosphere Coupling
Ankush Bhaskar, Jayadev Pradeep, Shyama Narendranath +10
In the present-day context, small satellites and their constellations consisting of varying sizes (nano, micro, pico satellites) are being favored for remote sensing and in situ pr…
Effect of the brightest gamma-ray burst (GRB 221009A) on low energy gamma-ray counts at sea level
Pranali Thakur, Gauri Datar, Geeta Vichare +1
A gamma-ray burst, named GRB 221009A, occurred on 9 October 2022 and is the brightest ever observed GRB, whose frequency is now estimated as once in 10,000 years. This GRB was repo…
A possible case of sporadic aurora observed at Rio de Janeiro
Denny M. Oliveira, Hisashi Hayakawa, Ankush Bhaskar +2
Being footprints of major magnetic storms and hence major solar eruptions, mid- to low-latitude aurorae have been one of the pathways to understand solar-terrestrial environments.…
Barometric Pressure Correction to Gamma-ray Observations and its Energy Dependence
Gauri Datar, Geeta Vichare, Selvaraj Chelliah
Cosmic rays (CRs) have been studied extensively in the last century to understand the processes in the universe as well as in the solar system. In today's satellite era, although m…
Causes of the Diurnal Variation observed in -ray Spectrum using NaI (Tl) Detector
Gauri Datar, Geeta Vichare, C. Selvaraj +2
Present paper studies the -ray spectrum observed using NaI(Tl) scintillation detector over a year. The paper reports the presence of a distinct diurnal pattern in the total numb…
Torsional Alfven wave embedded ICME magnetic cloud and corresponding geomagnetic storm
Anil N. Raghav, Ankita Kule, Ankush Bhaskar +3
The energy transfer during the interaction of large-scale solar wind structure and the Earth's magnetosphere is the chronic issue in space-weather studies. To understand this, rese…
Prediction of SYMH and ASYH indices for geomagnetic storms of solar cycle 24 including recent St. Patrick's day, 2015 storm using NARX neural network
Ankush Bhaskar, Geeta Vichare
Artificial Neural Network (ANN) has proven to be very successful in forecasting variety of irregular magnetospheric/ionospheric processes like geomagnetic storms and substorms. SYM…
Does Local Structure Within Shock-sheath and Magnetic Cloud Affect Cosmic Ray Decrease?
Anil Raghav, Zubair Shaikh, Ankush Bhaskar +2
The sudden short duration decrease in cosmic ray flux is known as Forbush decrease which is mainly caused by interplanetary disturbances. Generally accepted view is that the first…
Quantitative assessment of drivers of recent climate variability: An information theoretic approach
Ankush Bhaskar, Durbha Sai Ramesh, Geeta Vichare +2
Identification and quantification of possible drivers of recent climate variability remain a challenging task. This important issue is addressed adopting a non-parametric informati…
Relative contribution of the magnetic field barrier and solar wind speed in ICME-associated Forbush decreases
Ankush Bhaskar, Prasad Subramanian, Geeta Vichare
We study 50 cosmic ray Forbush decreases (FDs) from the Oulu neutron monitor data during 1997-2005 that were associated with Earth-directed interplanetary coronal mass ejections (I…
Spatial frequencies associated with the latitudinal structures of ionospheric currents seen by CHAMP satellite
Neethal Thomas, Geeta Vichare, A. K. Sinha
The CHAMP magnetic field variations during international quiet days of low solar activity period 2008-2009 are investigated. The present paper reports the existence of frequency-pe…
Understanding Forbush decrease drivers based on shock-only and CME-only models using global signature of February 14, 1978 event
Anil Raghav, Ankush Bhaskar, Ajay Lotekar +2
We have studied Forbush decrease (FD) event occurred on February 14, 1978 using 43 neutron monitor observatories to understand the global signature of FD. We have studied rigidity…