Upper_Atmosphere: Recent submissions

Now showing items 121-140 of 941

Investigation of equatorial plasma bubbles as observed in the OI 630 nm nightglow emissions over off-equatorial and low-latitudinal locations over Indian longitudes

Saha, Sovan; Pallamraju, Duggirala; Ghodpage, Rupesh N. (2022)

Equatorial plasma bubbles (EPBs), generated over the dip-equator during the sunset time, get mapped over to the low-latitudes through the geomagnetic field lines and contribute to structures of different scales in the ...
Debye-scale solitary structures in the Martian magnetosheath

Kakad, Bharati; Kakad, Amar; Aravindakshan, Harikrishnan; Kourakis, Ioannis (2022)

We present an analysis of 450 solitary wave pulses observed by the Langmuir Probe and Waves instrument on the Mars Atmosphere and Volatile EvolutioN spacecraft during its five passes around Mars on 2015 February 9. The ...
On the rayleigh wave induced ionospheric perturbations during the Mw 9.0 11 March 2011 Tohoku-Oki earthquake

Thomas, Dhanya; Bagiya, Mala S.; Hazarika, Nava Kumar; Ramesh, D.S. (2022)

Spatial and temporal characteristics of Rayleigh wave generated ionospheric perturbations are well documented based on the ionospheric measurements using Global Positioning System (GPS)-Total Electron Content (TEC) technique. ...
Ionospheric density oscillations associated with recurrent prompt penetration electric fields during the space weather event of 4 November 2021 over the East-Asian Sector

Singh, Ram; Lee, Y.S.; Song, S.M.; Kim, Y.H.; Yun, J.Y.; Sripathi, S.; B., Rajesh (2022)

We found the signatures of the multiple prompt penetration electric fields and the disturbance dynamo electric field having impacts on the East Asian sector ionosphere along the meridional chain thoroughly from the equator, ...
Instantaneous achievement of the hall and pedersen–cowling current circuits in northern and southern hemispheres during the geomagnetic sudden commencement on 12 May 2021

Kikuchi, Takashi; Araki, Tohru; Hashimoto, Kumiko K.; Ebihara, Yusuke; Tanaka, Takashi; Nishimura, Yukitoshi; Vichare, Geeta; Sinha, Ashwini K.; Chum, Jaroslav; Hosokawa, Keisuke; Tomizawa, Ichiro; Tanaka, Yoshimasa; Kadokura, Akira (2022)

The present article aims at a consistent understanding of observation, theoretical model, and simulation with the geomagnetic sudden commencement (SC) observed in the morning and afternoon at high and middle latitudes in ...
Large geomagnetically induced currents at equator caused by an interplanetary magnetic cloud

Nilam,B.; Tulasiram,S. (2022)

Here, we report a rare observation of an extremely large and rapid change of geomagnetic field (dB/dt), a proxy for the geomagnetically induced currents (GICs), at the equator caused by a sudden drop in solar wind density ...
All-sky imaging observations of mesospheric fronts from Silchar (24.7°N, 92.8°E)

Chauhan, Nilesh; Gurubaran,S.; Moulik, S.; Das, P.K.; Bagiya, Mala S. (2022)

An All-Sky Airglow Imager was operated at Silchar (24.68°N, 92.76°E), India from 9 to 11 December 2018, during a special observational campaign. We report the presence of two simultaneous mesospheric fronts observed in OH ...
First study of cloud to ground lightning discharges using ground-based observations over Indian subcontinent and its possible relationship with carbon dioxide and aerosols

Dube, Adarsh; Maurya, Ajeet Kumar; Dharmaraj, T.; Singh, Rajesh (2022)

We report the first estimation of Cloud to Ground (CG) lightning activity over the Indian subcontinent. Initial results from the analysis of ground-based data of worldwide lightning location network (WWLLN) over the Indian ...
Effect of solar wind pressure and substorm linked particle injection on local time distribution of electromagnetic ion cyclotron waves

Upadhyay, Aditi; Kakad, Bharati; Kakad, Amar; Rawat, R. (2022)

Several observations of electromagnetic ion cyclotron (EMIC) waves have been reported from the Earth’s magnetosphere. It is an important component of space weather research due to its efficient role in precipitating highly ...
Large-amplitude electrostatic fluctuations at the earth’s magnetopause with a vortex-like distribution of hot electrons

Rufai, O.R.; Khazanov, G.V.; Singh, S.V.; Lakhina, G.S. (2022)

Large-amplitude electrostatic solitary waves (ESWs) associated with asymmetric magnetic reconnection at the Earth’s magnetopause are studied in a four-component plasma composed of a mixture of the magnetosheath and ...
Planetary wave activity observed in atmosphere-ionosphere system over low latitudes

Jadhav, Ashish; Subramanian, Gurubaran; Patil, Parashram (2022)

The coupled response of the atmosphere-ionosphere system to planetary waves propagating from below has been observed through MF and Meteor radars at different longitudes along with the ground geomagnetic data from 23 ...
Measurement of Maxwell’s current density from a tropical station during severe lightning disturbances and fair-weather days of 2019

C.P., Anil Kumar; Venkatesh, N.; Panneerselvam, C.; Selvaraj, C. (2020)

A study of the global electric circuit can help us to understand the electrical environment of the Earth’s atmosphere. This approach provides a good frame work for exploring interconnections and coupling of various regions ...
Study on the response of the ionosphere to the three major space weather events of 2015 using a meridional chain of ionosondes and GPS receivers over India

Sripathi, S.; Singh, Ram (2019)

A comparative study is made on the response of the equator and low latitude ionosphere to three major storms in 2015, namely 17-18 March (St. Patrick’s Day), 22-23 June and 19-20 December, using ionosondes and GPS receivers ...
Investigation on high velocity plasmas and field aligned currents at high latitudes

Akhila, J.C.K.; C.P., Anil Kumar (2020)

The interaction of high velocity plasma with Earth’s magnetic field is fundamental and offer many questions on high latitude electrodynamics. The problems associated with influence of electric field and Field Aligned Current ...
Evolution of Earth’s magnetosheath as a planar magnetic structure

Shaikh, Zubair I.; Raghav, Anil N. (2022)

In general, the Earth’s magnetosheath (MS) plasma is highly compressed, heated, and turbulent. Thus, it provides preferential conditions in which to investigate plasma turbulence, dissipation, and transport, which are the ...
Effect of 21 June 2020 solar eclipse on the ionosphere using VLF and GPS observations and modeling

Tripathi, Gaurish; Singh, S.B.; Kumar, Sanjay; Singh, Ashutosh K.; Singh, Rajesh; Singh, A.K. (2022)

A solar eclipse event provides a great opportunity to examine the behavioral concept of the ionospheric electron density (Ne) variability in the low latitude region. The current work presents our outcomes from the simultaneous ...
Signatures of Equatorial Plasma Bubbles and Ionospheric Scintillations from Magnetometer and GNSS Observations in the Indian Longitudes during the Space Weather Events of Early September 2017

Vankadara, Ram Kumar; Panda, Sampad Kumar; Amory-Mazaudier, Christine; Fleury, Rolland; Devanaboyina, Venkata Ratnam; Pant, Tarun Kumar; Jamjareegulgarn, Punyawi; Haq, Mohd Anul; Okoh, Daniel; Seemala, Gopi K. (2022)

Scintillation due to ionospheric plasma irregularities remains a challenging task for the space science community as it can severely threaten the dynamic systems relying on space-based navigation services. In the present ...
Spatial manifestation of resonant ionospheric signatures during the 11 March 2011 Tohoku-Oki earthquake

Nayak, Srinivas; Bagiya, Mala S.; Sunil, A.S. (2022)

Resonant coupling between the solid Earth and atmosphere leads to higher amplitudes of normal mode oscillations at ∼ 3.7 mHz and ∼4.4 mHz frequencies. Earthquake is one of the potential solid earth sources which can trigger ...
Forecasting Geomagnetic activity (Dst Index) using the ensemble kalman filter

Nilam, B.; Tulasiram, S. (2022)

A novel Ensemble Kalman Filter (EnKF) method is adopted to make reliable forecasts of geomagnetic activity (Dst index) for real-time applications. In this method, an educated estimate (forecast) of Disturbance storm time ...
Rare observations of sprites and gravity waves supporting D, E, F‑regions ionospheric coupling

Maurya, Ajeet K.; Parihar, Navin; Dube, Adarsh; Singh, Rajesh; Kumar, Sushil; Chanrion, Olivier; Tomicic, Maja; Neubert, Torsten (2022)

We report rare simultaneous observations of columniform sprites and associated gravity waves (GWs) using the Transient Luminous Events (TLEs) camera and All-sky imager at Prayagraj (25.5° N, 81.9° E, geomag. lat. ~ 16.5° ...

Now showing items 121-140 of 941

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