DSpace at IIG
→
Browsing by Author

Browsing by Author "Bagiya, Mala S."

Now showing items 1-20 of 33

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 ...
Anisotropy of the near-field coseismic ionospheric perturbation amplitudes reflecting the source process: the 2023 February Turkey earthquakes

Bagiya, Mala S.; Heki, K.; Gahalaut, Vineet K. (2023)

The East Anatolian Fault in southern Turkey ruptured on 6 February 2023, causing a Mw 7.8 earthquake (EQ1), one of the largest strike-slip events recorded on land. ∼9 hr later, earthquake of Mw 7.7 (EQ2) occurred to the ...
Association of ionospheric signatures to various tectonic parameters during moderate to large magnitude earthquakes: case study

Sunil, A. S.; Bagiya, Mala S.; Bletery, Quentin; Ramesh, D. S. (2021)

The sudden ground movement associated with Mw > 6.5 earthquakes is considered a potential source of ionospheric electron density perturbations over the fault region. Coseismic ground displacement is a function of various ...
Coseismic Contortion and Coupled Nocturnal Ionospheric Perturbations During 2016 Kaikoura, Mw 7.8 New Zealand Earthquake

Bagiya, Mala S.; Sunil, P.S.; Sunil, A.S.; Ramesh, D.S. (2018)

The oblique-thrust Kaikoura earthquake of Mw 7.8 that struck New Zealand on 13 November 2016 at 11:02:56 UTC (local time at 00:02:56 a.m. on 14 November 2016) was one of the most geometrically and tectonically complex ...
Dependence of near field co-seismic ionospheric perturbations on surface deformations: A case study based on the April, 25 2015 Gorkha Nepal earthquake

Sunil, A.S.; Bagiya, Mala S.; Catherine, Joshi; Rolland, Lucie; Sharma, Nitin; Sunil, P.S.; Ramesh, D.S. (2016)

Ionospheric response to the recent 25 April 2015 Gorkha, Nepal earthquake is studied in terms of Global Positioning System-Total Electron Content (GPS-TEC) from the viewpoints of source directivity, rupture propagation ...
Effects of prolonged southward interplanetary magnetic field on low-latitude ionospheric electron density

Bagiya, Mala S.; Hazarika, Rumajyoti; Laskar, Fazlul I.; Sunda, Surendra; Gurubaran, S.; Chakrabarty, D.; Bhuyan, P.K.; Sridharan, R.; Veenadhari, B.; Pallamraju, D. (2014)

The present work describes the low-latitude ionospheric variability during an unusually prolonged (~33 h) geomagnetically disturbed condition that prevailed during 15–16 July 2012. The low-latitude electron density in ...
Efficiency of coseismic ionospheric perturbations in identifying crustal deformation pattern: Case study based on Mw 7.3 May Nepal 2015 earthquake

Bagiya, Mala S.; Sunil, A.S.; Sunil, P.S.; Sreejith, K.M.; Rolland, Lucie; Ramesh, D.S. (2017)

The amplitude asymmetry and initial polarity of seismic induced ionospheric perturbations around the epicenter are considered to be important in providing information about the rupture propagation and related vertical ...
An ensemble average method to estimate absolute TEC using radio beacon-based differential phase measurements: Applicability to regions of large latitudinal gradients in plasma density

Thampi, Smitha V.; Bagiya, Mala S.; Chakrabarty, D.; Acharya, Y.B.; Yamamoto, M. (2014)

A GNU Radio Beacon Receiver (GRBR) system for total electron content (TEC) measurements using 150 and 400 MHz transmissions from Low-Earth Orbiting Satellites (LEOS) is fabricated in house and made operational at Ahmedabad ...
First results on forecasting the spatial occurrence pattern of L-band scintillation and its temporal evolution

Sridharan, R.; Bagiya, Mala S.; Sunda, Surendra; Choudhary, Rajkumar; Pant, Tarun K.; Jose, Lijo (2014)

After a fairly successful attempt to forecast the temporal evolution of L-band scintillation over a given location, Trivandrum (8.5° N, 76.91° E, dip latitude 0.5° N) (Sridharan et al., 2012, J. Atmos. Sol. Terr. Phys. 80 ...
Impact of the perturbation zonal velocity variation on the spatio/temporal occurrence pattern of L band scintillation—A case study

Bagiya, Mala S.; Sridharan, R.; Sunda, Surendra; Pant, Tarun K.; Choudhary, Rajkumar (JGR, 120, P. 5882–5889, DOI: 10.1002/ 2015JA021322, 2015)

The earlier evolved method for the forecast of the spatiotemporal variation of L band scintillation based on the expected variation of the perturbations, under favorable ionospheric/thermospheric conditions, has been ...
Ionospheric view of the 2011 Tohoku-Oki earthquake seismic source: the frst 60seconds of the rupture

Bagiya, Mala S.; Thomas, Dhanya; Astafyeva, Elvira; Bletery, Quentin; Lognonné, Philippe; Ramesh, Durbha Sai (2020)

Using the specifc satellite line of sight geometry and station location with respect to the source, Thomas et al. [Scientifc Reports, https://doi.org/10.1038/s41598-018-30476-9] developed a method to infer the detection ...
Low-latitude ionospheric-thermospheric response to storm time electrodynamical coupling between high and low latitudes

Bagiya, Mala S.; Iyer, K.N.; Joshi, H.P.; Thampi, Smitha V.; Tsugawa, Takuya; Ravindran, Sudha; Sridharan, R.; Pathan, B.M. (2011)

Using multi-instrumental and multistation data, we present low-latitude ionospheric-thermospheric behavior during the geomagnetic storm of 15 May 2005. The diurnal pattern of total electron content (TEC) at a chain of ...
Mapping the impact of non tectonic forcing mechanisms on GNSS measured coseismic ionospheric perturbations

Bagiya, Mala S.; Ponraj, S. (2019)

Global Navigation Satellite System (GNSS) measured Total Electron Content (TEC) is now widely used to study the near and far-field coseismic ionospheric perturbations (CIP). The generation of near field (~500–600km surrounding ...
Observing the geohazards from the space

Bagiya, Mala S.; Heki, Kosuke (2023)

The ionospheric manifestations of geohazards of earthquakes and tsunamis are well documented based on the radio sounding of the medium.In particular, Global Navigation Satellite Systems (GNSS) based ionospheric monitoring ...
On the GPS TEC variability for full solar cycle and its comparison with IRI-2016 model

Jethva, Chintan; Bagiya, Mala S.; Joshi, H.P. (2022)

The long-term comparison of International Reference Ionosphere (IRI-2016) predicted total electron content (TEC) with GPS TEC has been performed over low latitude northern EIA crest region (geographic: 22.29° N, 70.74° ...
On the Nocturnal Downward and Westward Equatorial Ionospheric Plasma Drifts During the 17 March 2015 Geomagnetic Storm

Bagiya, Mala S.; Vichare, Geeta; Sinha, Ashwini K.; Sripathi, S. (2018)

During quiet period, the nocturnal equatorial ionospheric plasma drifts eastward in the zonal direction and downward in the vertical direction. This quiet time drift pattern could be understood through dynamo processes ...
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. ...
On the role of volcanic plume heights in excitation of free oscillations of the solid Earth and atmosphere: Case study

Tiwari, Satyamesh H.; Bagiya, Mala S.; Maurya, Satish; Heki, K.; Dimri, A.P. (2024-03)

Volcanic eruptions are potential sources for generating the Earth’s free oscillations at spheroidal modes of 0S29 and 0S37 through acoustic resonant coupling between the Earth and its atmosphere. Then, does every volcano ...
Origin of the ahead of tsunami traveling ionospheric disturbances during Sumatra tsunami and offshore forecasting

Bagiya, Mala S.; Kherani, E.A.; Sunil, P.S.; Sunil, A.S.; Sunda, S.; Ramesh, D.S. (2017)

The presence of ionospheric disturbances associated with Sumatra 2004 tsunami that propagated ahead of tsunami itself has previously been identified. However, their origin remains unresolved till date. Focusing on their ...
Post-seismic ionospheric response to the 11 April 2012 East Indian Ocean doublet earthquake

Sunil, Anakuzhikkal Sudarsanan; Bagiya, Mala S.; Reddy, C.D.; Kumar, Manish; Ramesh, D.S. (2015)

The 11 April 2012 East Indian Ocean earthquake is unique because of its largest ever recorded aftershock. The main earthquake occurred with a magnitude of 8.6 Mw and was followed by a strong aftershock (8.2 Mw). Our analysis ...

Now showing items 1-20 of 33

Search DSpace

Advanced Search

Browse

All of DSpace

Browsing by Author "Bagiya, Mala S."

Browsing by Author "Bagiya, Mala S."

Search DSpace

Browse

All of DSpace

My Account