A5045262065- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Earthquake Detection and Analysis
- Fluoride Effects and Removal
- Atmospheric Ozone and Climate
- GNSS positioning and interference
- Mercury impact and mitigation studies
- Groundwater and Isotope Geochemistry
- Astro and Planetary Science
Physical Research Laboratory
2021-2025
Universidade do Vale do Paraíba
2025
Indian Institute of Technology Gandhinagar
2021-2023
Abstract This study uses multiple ground and satellite‐based measurements to investigate the extreme ionospheric response Mother's Day storm on May 10–11, 2024. Prompt penetration electric field caused a significant enhancement in vertical drift ( 95 m/s) equatorial electrojet strength 275 nT) over Jicamarca. These eastward perturbations, along with large meridional wind, significantly altered F‐region plasma fountain at different local times. The afternoon ionization anomaly (EIA) not only...
Abstract During a weak geomagnetic storm (Ap = 15) on 24 December 2014, the penetration electric field perturbations over Indian dip equatorial sector are found to be anomalous number of occasions during postsunset hours. The event is as magnitude and polarity fields do not obey existing paradigm. investigated using vertical drifts derived from CADI (Canadian Advanced Digital Ionosonde) measurements at Tirunelveli (8.7°N, 77.7°E, angle: 1.7°). this event, we observed drift ∼42 m s −1 only...
Abstract Based on 10 years' (2010–2019) of vertical total electron content (VTEC) data from Ahmedabad (23.0°N, 72.6°E, dip angle 35.2°) and campaign based OI 630.0 nm airglow intensity measurements Mt. Abu (24.6°N, 72.7°E, 38.0°), it is shown that plasma density over the equatorial ionization anomaly (EIA) crest region increases in varying degrees during post‐sunset hours (2000–2100 LT) magnetically quiet periods. The peak VTEC precedes corresponding intensity. By comparing enhancements with...
Abstract Based on 10 years' of vertical total electron content (VTEC) data in solar cycle 24 from Ahmedabad (23.0°N, 72.6°E, dip angle 35.2°), a station under the crest region equatorial ionization anomaly (EIA), it is shown that both integrated residual and post‐sunset enhancements VTEC are conspicuous during Equinox December solstice when flux level exceeds 110 unit (sfu) with exception year 2012–2013. The absent June at this local time even if sfu. hours found to be linearly correlated...