Research Interests

Space Weather and its impacts on Magnetosphere-Ionosphere system

Inner Magnetospheric dynamics- Ring current development observations and simulation

Magnetosphere-Ionosphere coupling- Field Aligned currents, Storm time electric fields,

Low and Equatorial latitude Ionosphere- Equatorial electrojet, Ionospheric currents, Equatorial Electrodynamics 

Professional Experience

• Research Scientist: October 2024 to present at NASA GSFC, Maryland, USA 

• JSPS postdoctoral fellow: October, 2022 to September 2024 at Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan

• Postdoctoral fellow: December, 2019 to September, 2022 at  Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan

• Postdoctoral fellow: April, 2018 to November, 2019 at Physical Research Laboratory, Ahmedabad, India 

• Research Associate: April, 2016 to April, 2018 at Indian Institute of Geomagnetism, Navi Mumbai, India 

Academic Qualifications

• Ph. D.     Studies on equatorial and low latitude ionospheric electrodynamics and coupling processes during geomagnetically quiet and disturbed periods at Indian Institute of Geomagnetism, Navi Mumbai, India

• M. Sc.   ( Physics)     2008 - 2010    National Institute of Technology (NIT), Jalandhar, India

• B. Sc.    (Physics,  Mathematics, Chemistry)      2005 - 2008    Guru Nanak Dev University,  Amritsar, India

Research Publications

1.  Singh, Ram, Sandeep Kumar, and Kuldeep Pandey (2025). "Editorial [Space Weather: Magnetosphere-Ionosphere-Thermosphere (MIT) Coupling]." Frontiers in Astronomy and Space Sciences 12 ,doi: 10.3389/fspas.2025.1632922.

2.  P. R. Shreedevi, Yiqun Yu, Y. Miyoshi, X Tian, M Zhu, Vania K. Jordanova, S. Nakamura, Chae-Woo Jun, Sandeep Kumar, K Shiokawa, et al., (2024), Global distribution of EMIC waves and its association to subauroral proton precipitation during the 27 May 2017 storm: Modeling and multipoint observations, J. Geophys. Res. Space Physics, 129, e2023JA032337,https://doi.org/10.1029/2023JA032337. 

3.  Rout, D., Patra, Sandeep, Kumar, S., Chakrabarty, D., Reeves, G. D., Stolle, C., et al. (2023). The growth of ring current/SYM-H under northward IMF Bz conditions present during the 21–22 January 2005 geomagnetic storm. Space Weather, 21, e2023SW003489. https://doi.org/10.1029/2023SW003489.

4.  Sandeep Kumar , Y. Miyoshi, V. Jordanova, L. M. Kistler, I. Park, C. Jun, T. Hori, K. Asamura et al., (2023), Plasma pressure distribution of ions and electrons in the inner magnetosphere during CIR driven storms observed during Arase era Journal of Geophysical Research: Space Physics, 128, e2023JA031756, https://doi.org/10.1029/2023JA031756.  

5.  Sandeep Kumar, Miyoshi, Y., Jordanova, V. K., Engel, M., Asamura, K., Yokota, S., et al. (2021), Contribution of electron pressure to ring current and ground magnetic depression using RAM-SCB simulations and Arase observations during 7–8 November 2017 magnetic storm. Journal of Geophysical Research: Space Physics, 126, e2021JA029109, https://doi.org/10.1029/2021JA029109.

6.  Y. Ebihara, S. Watari & Sandeep Kumar (2021), Prediction of geomagnetically induced currents (GICs) flowing in Japanese power grid for Carrington-class magnetic storms. Earth Planets Space, 73, 163. https://doi.org/10.1186/s40623-021-01493-2.

7.  Sandeep Kumar, B. Veenadhari, D. Chakrabarty, S. Tulasi Ram, T. Kikuchi and Y. Miyoshi (2020), Effects of IMF By on ring current asymmetry under southward IMF Bz conditions observed at ground magnetic stations: Case studies, Journal of Geophysical Research: Space Physics, 125, e2019JA027493, https://doi.org/10.1029/2019JA027493.

8.  B. Veenadhari, T. Kikuchi, Sandeep Kumar, S. Tulasi Ram, D. Chakrabarty, Rajesh Singh, Y. Ebihara, G. D. Reeves (2019), Signatures of substorm related overshielding electric field at equatorial latitudes under steady southward IMF Bz during the main phase of the magnetic storm, Advances in Spaces Research, Volume 64, Issue 10, Pages 1975‐1988, https://doi.org/10.1016/j.asr.2019.04.001.

9.   Megha Pandya, B Veenadhari, M Nose, Sandeep Kumar, G.D. Reeves, A. T. Y. Lui (2018), Characteristics of storm time ion composition in the near‐Earth plasma sheet using Geotail and RBSP measurements, Earth, Planets and Space, 79 (203), https://doi.org/10.1186/s40623-018-0977-3.

10.  Hisashi Hayakawa, Yusuke Ebihara, David P. Hand, Satoshi Hayakawa, Sandeep Kumar, Shyamoli Mukherjee and B. Veenadhari (2018), Low‐Latitude Aurorae during the Extreme Space Weather Events in 1859, The Astrophysical Journal, Vol. 869 no. 1, https://doi.org/10.3847/1538-4357/aae47c.

11.  R. Selvakumaran, B. Veenadhari, Y. Ebihara, Sandeep Kumar, D.S.V.V.D Prasad (2017), The role of interplanetary shock orientation on SC/SI rise time and geoeffectiveness, Advances in Space Research, 59, pp 1425–1434, https://doi.org/10.1016/j.asr.2016.12.010. 

12.  Sneha A. Gokani, Rajesh Singh, S. Tulasi Ram, K. Venkatesham, B. Veenadhari, Sandeep Kumar, R. Selvakumaran (2017), Rare observation of daytime whistlers at very low latitude (L=1.08), Advances in Space Research, 61, Pages 1909‐1918, https://doi.org/10.1016/j.asr.2017.07.035. 

13.  Sandeep Kumar, B. Veenadhari, S. Tulasi Ram, S.‐Y. Su and T. Kikuchi (2016), Possible relationship between Equatorial Electrojet (EEJ) and F‐region vertical ExB drifts observed by ROCSAT‐1 satellite, Advances in Space Research, 58, 1168–1176, https://doi.org/10.1016/j.asr.2016.06.009.  

14.  R. Selvakumaran, B. Veenadhari, S. Akiyama, Megha Pandya, N. Gopalswamy, S. Yashiro, Sandeep Kumar, P. Mäkelä, H. Xie (2016), On the reduced geoeffectiveness of solar cycle 24: a moderate storm perspective, J. Geophys. Res. Space Physics, 121, 8188–8202, https://doi.org/10.1002/2016JA022885.  

15.  Sandeep Kumar, B. Veenadhari, S. Tulasi Ram, R. Selvakumaran, S. Mukherjee, R. Singh and B. D. Kadam (2015), Estimation of interplanetary electric field conditions for historical geomagnetic storms, J. Geophys. Res. Space Physics, 120,7307–7317, https://doi.org/10.1002/2015JA021661.

16.  S. Tulasi Ram, Sandeep Kumar, S.‐Y. Su, B. Veenadhari and Sudha Ravindran (2014), The influence of Corotating Interaction Region (CIR) driven geomagnetic storms on the development of equatorial plasma bubbles (EPBs) over wide range of longitudes– Advances in Space Research, 55, 535–544, https://doi.org/10.1016/j.asr.2014.10.013.  

17.  B. Veenadhari, Sandeep Kumar, S. Tulasi Ram, Rajesh Singh & S. Alex (2012), Corotating interaction regions (CIRs) induced magnetic storms during solar minimum and their effects on low latitude geomagnetic field and ionosphere, IJRSP, Vol.41, pp 306‐315 http://nopr.niscair.res.in/handle/123456789/14051.

18.  S. Tulasi Ram, M. Yamamoto, B. Veenadhari, Sandeep Kumar & S. Gurubaran (2012), Corotating interaction regions (CIRs) at sub‐harmonic rotational periods and their impact on the ionosphere‐thermosphere system during the extremely low activity year 2008, IJRSP, Vol.41, pp 294‐305. http://nopr.niscair.res.in/handle/123456789/14049.

International and National Conferences

Conferences attended 

Awards/Honors

    Selected for prestigious Japan Society for the Promotion of Science (JSPS) Postdoctoral Fellowship at Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan

      Selected for prestigious ISEE postdoctoral fellow at Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan

Technical Skills / Teaching Experience

•  Programming & Scripting Languages: MATLAB (Advance); IDL (Moderate); Python (Moderate)

•  Tools & Libraries: SPEDAS, LATEX, and Microsoft Office Products

• Basic Space Plasma Physics and electrodynamics to research students as part of their pre-Ph.D. course at Indian Institute of Geomagnetism during the years 2014 - 2017

Training workshops 

• COSPAR ISWAT 2025 Working Meeting, (February 10-14, 2025 , Port Canaveral, Florida, USA)

• 19th ERG Science Conference/Nagoya University, ISEE Research Meeting/Observation of Arase in heliosphere system science in the 2020s/The role of the inner magnetosphere in the solar wind magnetosphere ionosphere global system/Heliospheric Science, (November 27-29, 2023, University of Tokyo, Hongo Campus (Hybrid))

• 18th ERG Science Conference/Nagoya University, ISEE Joint Research Meeting/Inner magnetosphere research meeting: Plasma wave analysis workshop using the Latest Integrated Analysis Tools Integrated research study group on internal magnetospheric wave-particle interactions using satellite/ground observations and model/simulations/Wave-particle interactions in laboratory and space plasma, (March 13-15, 2023, Kanazawa University (Hybrid))

• 17th ERG Science Conference/Observation of Arase in heliosphere system science in the 2020s/Inner Magnetosphere Study Group: Role of the inner magnetosphere in the magnetospheric-ionospheric system, (September 26-28, 2022, University of Tokyo, Komaba Campus (Hybrid))

• 16th ERG Science Conference/Inner Magnetosphere Workshop: Plasma Wave Analysis Workshop/Plasma and High Energy Particle Dynamics in Geospace, (March 15-16, 2022, Online)

• 15th ERG Science Conference/Inner Magnetosphere Research Meeting: Acceleration and Elimination of Radiation Belt Particles/Interdisciplinary Study Group on Inner Magnetospheric -Particle Interactions Based on Satellite Observations, Ground Observations, Models, and Simulations (October 12-13, 2021, Online)

•  3rd ISEE Symposium PWING-ERG conference and school on the inner magnetosphere (ISEE, Nagoya University, Japan, March 8-12, 2021)

•  14th ERG Science Conference and Inner Magnetosphere Workshop, (February 9-10, 2021, Online)

• Participated in the ‘SCOSTEP/ISWI International School on Space Science’ at Sangli, India, during 07‐17 November 2016.

Special Mentions 

• Serving as Associate Editor in Frontiers in Astronomy and Space Sciences & Frontiers in Physics

• Served as Guest Editor in Frontiers in Astronomy and Space Sciences: Space Physics (Space weather: Magnetosphere Ionosphere Thermosphere (M-I-T) Coupling)

• Serving as reviewer for:

Journal of Geophysical Research: Space Physics

Geophysical Research Letters

Earth Planets and Space

• Qualified the Ph. D. Entrance Test (PET) of the University of Mumbai in 2012.

Contact 

Email ID: sandeepk.iig@gmail.com ; sandeep.kumar-1@nasa.gov; kumarsa@cua.edu 

Other links: GoogleScholar ORCID Linkedin 

Research Publications Under Review