Publications of Rajkumar Hajra ordered by citations

A list of publications authored or co-authored by Rajkumar Hajra, derived from the SAO/NASA Astrophysics Data System (ADS) and ordered by the numbers of citations. Publications above the horizontal line count towards the h-index.

Orcid ID: 0000-0003-0447-1531

88	Solar cycle dependence of High-Intensity Long-Duration Continuous AE Activity (HILDCAA) events, relativistic electron predictors? Hajra, R., Echer, E., Tsurutani, B. T. & Gonzalez, W. D., 2013, Journal of Geophysical Research (Space Physics), 118, 5626
64	Extremely intense (SML ≤-2500 nT) substorms: isolated events that are externally triggered? Tsurutani, B. T., Hajra, R., Echer, E. & Gjerloev, J. W., 2015, Annales Geophysicae, 33, 519
60	Relativistic (e > 0.6, > 2.0, and > 4.0 MeV) Electron Acceleration at Geosynchronous Orbit during High-intensity, Long-duration, Continuous AE Activity (HILDCAA) Events Hajra, Rajkumar, Tsurutani, Bruce T., Echer, Ezequiel, Gonzalez, Walter D. & Santolik, Ondrej, 2015, ApJ, 799, 39
59	Heliospheric plasma sheet (HPS) impingement onto the magnetosphere as a cause of relativistic electron dropouts (REDs) via coherent EMIC wave scattering with possible consequences for climate change mechanisms Tsurutani, B. T., Hajra, R., Tanimori, T., Takada, A., Bhanu, R., Mannucci, A. J., Lakhina, G. S., Kozyra, J. U., Shiokawa, K., Lee, L. C., Echer, E., Reddy, R. V. & Gonzalez, W. D., 2016, Journal of Geophysical Research (Space Physics), 121, 10,130
54	Diamagnetic region(s): structure of the unmagnetized plasma around Comet 67P/CG Henri, P., Vallières, X., Hajra, R., Goetz, C., Richter, I., Glassmeier, K. -H., Galand, M., Rubin, M., Eriksson, A. I., Nemeth, Z., Vigren, E., Beth, A., Burch, J. L., Carr, C., Nilsson, H., Tsurutani, B. & Wattieaux, G., 2017, MNRAS, 469, S372
52	Relativistic electron acceleration during high-intensity, long-duration, continuous AE activity (HILDCAA) events: Solar cycle phase dependences Hajra, Rajkumar, Tsurutani, Bruce T., Echer, Ezequiel & Gonzalez, Walter D., 2014, Geophysical Research Letters, 41, 1876
51	The physics of space weather/solar-terrestrial physics (STP): what we know now and what the current and future challenges are Tsurutani, Bruce T., Lakhina, Gurbax S. & Hajra, Rajkumar, 2020, Nonlinear Processes in Geophysics, 27, 75
46	Supersubstorms (SML < -2500 nT): Magnetic storm and solar cycle dependences Hajra, Rajkumar, Tsurutani, Bruce T., Echer, Ezequiel, Gonzalez, Walter D. & Gjerloev, Jesper W., 2016, Journal of Geophysical Research (Space Physics), 121, 7805
45	Plasma source and loss at comet 67P during the Rosetta mission Heritier, K. L., Galand, M., Henri, P., Johansson, F. L., Beth, A., Eriksson, A. I., Vallières, X., Altwegg, K., Burch, J. L., Carr, C., Ducrot, E., Hajra, R. & Rubin, M., 2018, A&A, 618, A77
44	Solar wind-magnetosphere energy coupling efficiency and partitioning: HILDCAAs and preceding CIR storms during solar cycle 23 Hajra, Rajkumar, Echer, Ezequiel, Tsurutani, Bruce T. & Gonzalez, Walter D., 2014, Journal of Geophysical Research (Space Physics), 119, 2675
43	Interplanetary Shocks Inducing Magnetospheric Supersubstorms (SML < -2500 nT): Unusual Auroral Morphologies and Energy Flow Hajra, Rajkumar & Tsurutani, Bruce T., 2018, ApJ, 858, 123
39	Electromagnetic cyclotron waves in the dayside subsolar outer magnetosphere generated by enhanced solar wind pressure: EMIC wave coherency Remya, B., Tsurutani, B. T., Reddy, R. V., Lakhina, G. S. & Hajra, R., 2015, Journal of Geophysical Research (Space Physics), 120, 7536
38	The Interplanetary and Magnetospheric causes of Geomagnetically Induced Currents (GICs) > 10 A in the Mäntsälä Finland Pipeline: 1999 through 2019 Tsurutani, Bruce T. & Hajra, Rajkumar, 2021, Journal of Space Weather and Space Climate, 11, 23
36	The Complex Space Weather Events of 2017 September Hajra, Rajkumar, Tsurutani, Bruce T. & Lakhina, Gurbax S., 2020, ApJ, 899, 3
28	Superposed epoch analyses of HILDCAAs and their interplanetary drivers: Solar cycle and seasonal dependences Hajra, Rajkumar, Echer, Ezequiel, Tsurutani, Bruce T. & Gonzalez, Walter D., 2014, Journal of Atmospheric and Solar-Terrestrial Physics, 121, 24
28	Cometary plasma response to interplanetary corotating interaction regions during 2016 June-September: a quantitative study by the Rosetta Plasma Consortium Hajra, Rajkumar, Henri, Pierre, Myllys, Minna, Héritier, Kevin L., Galand, Marina, Simon Wedlund, Cyril, Breuillard, Hugo, Behar, Etienne, Edberg, Niklas J. T., Goetz, Charlotte, Nilsson, Hans, Eriksson, Anders I., Goldstein, Raymond, Tsurutani, Bruce T., Moré, Jerome, Vallières, Xavier & Wattieaux, Gaetan, 2018, MNRAS, 480, 4544
28	Lower-Band "Monochromatic" Chorus Riser Subelement/Wave Packet Observations Tsurutani, Bruce T., Chen, Rui, Gao, Xinliang, Lu, Quanming, Pickett, Jolene S., Lakhina, Gurbax S., Sen, Abhijit, Hajra, Rajkumar, Park, Sang A. & Falkowski, Barbara J., 2020, Journal of Geophysical Research (Space Physics), 125, e28090
27	Relativistic electron acceleration during HILDCAA events: are precursor CIR magnetic storms important? Hajra, Rajkumar, Tsurutani, Bruce T., Echer, Ezequiel, Gonzalez, Walter D., Brum, Christiano Garnett Marques, Vieira, Luis Eduardo Antunes & Santolik, Ondrej, 2015, Earth, Planets and Space, 67, 109
26	An empirical model of ionospheric total electron content (TEC) near the crest of the equatorial ionization anomaly (EIA) Hajra, Rajkumar, Chakraborty, Shyamal Kumar, Tsurutani, Bruce T., DasGupta, Ashish, Echer, Ezequiel, Brum, Christiano G. M., Gonzalez, Walter D. & Sobral, José Humberto Andrade, 2016, Journal of Space Weather and Space Climate, 6, A29
26	Impact of a cometary outburst on its ionosphere. Rosetta Plasma Consortium observations of the outburst exhibited by comet 67P/Churyumov-Gerasimenko on 19 February 2016 Hajra, R., Henri, P., Vallières, X., Galand, M., Héritier, K., Eriksson, A. I., Odelstad, E., Edberg, N. J. T., Burch, J. L., Broiles, T., Goldstein, R., Glassmeier, K. H., Richter, I., Goetz, C., Tsurutani, B. T., Nilsson, H., Altwegg, K. & Rubin, M., 2017, A&A, 607, A34
24	Electrojet control of ambient ionization near the crest of the equatorial anomaly in the Indian zone Chakraborty, S. K. & Hajra, R., 2009, Annales Geophysicae, 27, 93
24	Weakest Solar Cycle of the Space Age: A Study on Solar Wind-Magnetosphere Energy Coupling and Geomagnetic Activity Hajra, Rajkumar, 2021, Solar Physics, 296, 33
24	A study on the main periodicities in interplanetary magnetic field Bz component and geomagnetic AE index during HILDCAA events using wavelet analysis Souza, A. M., Echer, E., Bolzan, M. J. A. & Hajra, R., 2016, Journal of Atmospheric and Solar-Terrestrial Physics, 149, 81
24	Solar control of ambient ionization of the ionosphere near the crest of the equatorial anomaly in the Indian zone Chakraborty, S. K. & Hajra, R., 2008, Annales Geophysicae, 26, 47
22	Plasmaspheric Hiss: Coherent and Intense Tsurutani, Bruce T., Park, Sang A., Falkowski, Barbara J., Lakhina, Gurbax S., Pickett, Jolene S., Bortnik, Jacob, Hospodarsky, George, Santolik, Ondrej, Parrot, Michel, Henri, Pierre & Hajra, Rajkumar, 2018, Journal of Geophysical Research (Space Physics), 123, 10,009
19	Cross-correlation and cross-wavelet analyses of the solar wind IMF Bz and auroral electrojet index AE coupling during HILDCAAs Marques de Souza, Adriane, Echer, Ezequiel, José Alves Bolzan, Mauricio & Hajra, Rajkumar, 2018, Annales Geophysicae, 36, 205
18	Corotating Interaction Regions during Solar Cycle 24: A Study on Characteristics and Geoeffectiveness Hajra, Rajkumar & Sunny, Jibin V., 2022, Solar Physics, 297, 30
18	Space Plasma Physics: A Review Tsurutani, Bruce T., Zank, Gary P., Sterken, Veerle J., Shibata, Kazunari, Nagai, Tsugunobu, Mannucci, Anthony J., Malaspina, David M., Lakhina, Gurbax S., Kanekal, Shrikanth G., Hosokawa, Keisuke, Horne, Richard B., Hajra, Rajkumar, Glassmeier, Karl-Heinz, Gaunt, C. Trevor, Chen, Peng-Fei & Akasofu, Syun-Ichi, 2023, IEEE Transactions on Plasma Science, 51, 1595
18	Magnetospheric "Killer" Relativistic Electron Dropouts (REDs) and Repopulation: A Cyclical Process Hajra, Rajkumar & Tsurutani, Bruce T., 2018, Extreme Events in Geospace. Origins, Predictability, and Consequences (Editors: Buzulukova, Natalia), p.373
17	Long Term Variations of the Geomagnetic Activity: A Comparison Between the Strong and Weak Solar Activity Cycles and Implications for the Space Climate Hajra, Rajkumar, Marques de Souza Franco, Adriane, Echer, Ezequiel & José Alves Bolzan, Mauricio, 2021, Journal of Geophysical Research (Space Physics), 126, e28695
17	Medium-Range Thermosphere-Ionosphere Storm Forecasts Mannucci, A. J., Verkhoglyadova, O. P., Tsurutani, B. T., Meng, X., Pi, X., Wang, C., Rosen, G., Lynch, E., Sharma, S., Ridley, A., Manchester, W., Van Der Holst, B., Echer, E. & Hajra, R., 2015, Space Weather, 13, 125
17	A correlation study regarding the AE index and ACE solar wind data for Alfvénic intervals using wavelet decomposition and reconstruction Guarnieri, Fernando L., Tsurutani, Bruce T., Vieira, Luis E. A., Hajra, Rajkumar, Echer, Ezequiel, Mannucci, Anthony J. & Gonzalez, Walter D., 2018, Nonlinear Processes in Geophysics, 25, 67
17	Comment on "Modeling Extreme "Carrington-Type" Space Weather Events Using Three-Dimensional Global MHD Simulations" by C. M. Ngwira, A. Pulkkinen, M. M. Kuznetsova, and A. Glocer" Tsurutani, Bruce T., Lakhina, Gurbax S., Echer, Ezequiel, Hajra, Rajkumar, Nayak, Chinmaya, Mannucci, Anthony J. & Meng, Xing, 2018, Journal of Geophysical Research (Space Physics), 123, 1388
17	Dynamic unmagnetized plasma in the diamagnetic cavity around comet 67P/Churyumov-Gerasimenko Hajra, Rajkumar, Henri, Pierre, Vallières, Xavier, Moré, Jerome, Gilet, Nicolas, Wattieaux, Gaetan, Goetz, Charlotte, Richter, Ingo, Tsurutani, Bruce T., Gunell, Herbert, Nilsson, Hans, Eriksson, Anders I., Nemeth, Zoltan, Burch, James L. & Rubin, Martin, 2018, MNRAS, 475, 4140
15	Energetics of Shock-triggered Supersubstorms (SML < -2500 nT) Tsurutani, Bruce T. & Hajra, Rajkumar, 2023, ApJ, 946, 17
14	Properties of the singing comet waves in the 67P/Churyumov-Gerasimenko plasma environment as observed by the Rosetta mission Breuillard, H., Henri, P., Bucciantini, L., Volwerk, M., Karlsson, T., Eriksson, A., Johansson, F., Odelstad, E., Richter, I., Goetz, C., Vallières, X. & Hajra, R., 2019, A&A, 630, A39
14	Estimation of energy budget of ionosphere-thermosphere system during two CIR-HSS events: observations and modeling Verkhoglyadova, Olga, Meng, Xing, Mannucci, Anthony J., Tsurutani, Bruce T., Hunt, Linda A., Mlynczak, Martin G., Hajra, Rajkumar & Emery, Barbara A., 2016, Journal of Space Weather and Space Climate, 6, A20
13	Characterization of high-intensity, long-duration continuous auroral activity (HILDCAA) events using recurrence quantification analysis Mendes, Odim, Oliveira Domingues, Margarete, Echer, Ezequiel, Hajra, Rajkumar & Everton Menconi, Varlei, 2017, Nonlinear Processes in Geophysics, 24, 407
13	Near-Earth Sub-Alfvénic Solar Winds: Interplanetary Origins and Geomagnetic Impacts Hajra, Rajkumar & Tsurutani, Bruce T., 2022, ApJ, 926, 135
12	High-speed solar wind stream effects on the topside ionosphere over Arecibo: A case study during solar minimum Hajra, Rajkumar, Tsurutani, Bruce T., Brum, Christiano G. M. & Echer, Ezequiel, 2017, Geophysical Research Letters, 44, 7607
12	Variation of the Interplanetary Shocks in the Inner Heliosphere Hajra, Rajkumar, 2021, ApJ, 917, 91
11	Seasonal features of geomagnetic activity: a study on the solar activity dependence Marques de Souza Franco, Adriane, Hajra, Rajkumar, Echer, Ezequiel & José Alves Bolzan, Mauricio, 2021, Annales Geophysicae, 39, 929
11	Low Frequency (f < 200 Hz) Polar Plasmaspheric Hiss: Coherent and Intense Tsurutani, Bruce T., Park, Sang A., Falkowski, Barbara J., Bortnik, Jacob, Lakhina, Gurbax S., Sen, Abhijit, Pickett, Jolene S., Hajra, Rajkumar, Parrot, Michell & Henri, Pierre, 2019, Journal of Geophysical Research (Space Physics), 124, 10,063
11	Plasma density structures at comet 67P/Churyumov-Gerasimenko Engelhardt, I. A. D., Eriksson, A. I., Stenberg Wieser, G., Goetz, C., Rubin, M., Henri, P., Nilsson, H., Odelstad, E., Hajra, R. & Vallières, X., 2018, MNRAS, 477, 1296
10	The Comet Interceptor Mission Jones, Geraint H., Snodgrass, Colin, Tubiana, Cecilia, Küppers, Michael, Kawakita, Hideyo, Lara, Luisa M., Agarwal, Jessica, André, Nicolas, Attree, Nicholas, Auster, Uli, Bagnulo, Stefano, Bannister, Michele, Beth, Arnaud, Bowles, Neil, Coates, Andrew, Colangeli, Luigi, Corral van Damme, Carlos, Da Deppo, Vania, De Keyser, Johan, Della Corte, Vincenzo, Edberg, Niklas, El-Maarry, Mohamed Ramy, Faggi, Sara, Fulle, Marco, Funase, Ryu, Galand, Marina, Goetz, Charlotte, Groussin, Olivier, Guilbert-Lepoutre, Aurélie, Henri, Pierre, Kasahara, Satoshi, Kereszturi, Akos, Kidger, Mark, Knight, Matthew, Kokotanekova, Rosita, Kolmasova, Ivana, Kossacki, Konrad, Kührt, Ekkehard, Kwon, Yuna, La Forgia, Fiorangela, Levasseur-Regourd, Anny-Chantal, Lippi, Manuela, Longobardo, Andrea, Marschall, Raphael, Morawski, Marek, Muñoz, Olga, Näsilä, Antti, Nilsson, Hans, Opitom, Cyrielle, Pajusalu, Mihkel, Pommerol, Antoine, Prech, Lubomir, Rando, Nicola, Ratti, Francesco, Rothkaehl, Hanna, Rotundi, Alessandra, Rubin, Martin, Sakatani, Naoya, Sánchez, Joan Pau, Simon Wedlund, Cyril, Stankov, Anamarija, Thomas, Nicolas, Toth, Imre, Villanueva, Geronimo, Vincent, Jean-Baptiste, Volwerk, Martin, Wurz, Peter, Wielders, Arno, Yoshioka, Kazuo, Aleksiejuk, Konrad, Alvarez, Fernando, Amoros, Carine, Aslam, Shahid, Atamaniuk, Barbara, Baran, Jedrzej, Barciński, Tomasz, Beck, Thomas, Behnke, Thomas, Berglund, Martin, Bertini, Ivano, Bieda, Marcin, Binczyk, Piotr, Busch, Martin-Diego, Cacovean, Andrei, Capria, Maria Teresa, Carr, Chris, Castro Marín, José María, Ceriotti, Matteo, Chioetto, Paolo, Chuchra-Konrad, Agata, Cocola, Lorenzo, Colin, Fabrice, Crews, Chiaki, Cripps, Victoria, Cupido, Emanuele, Dassatti, Alberto, Davidsson, Björn J. R., De Roche, Thierry, Deca, Jan, Del Togno, Simone, Dhooghe, Frederik, Donaldson Hanna, Kerri, Eriksson, Anders, Fedorov, Andrey, Fernández-Valenzuela, Estela, Ferretti, Stefano, Floriot, Johan, Frassetto, Fabio, Fredriksson, Jesper, Garnier, Philippe, Gaweł, Dorota, Génot, Vincent, Gerber, Thomas, Glassmeier, Karl-Heinz, Granvik, Mikael, Grison, Benjamin, Gunell, Herbert, Hachemi, Tedjani, Hagen, Christian, Hajra, Rajkumar, Harada, Yuki, Hasiba, Johann, Haslebacher, Nico, Herranz De La Revilla, Miguel Luis, Hestroffer, Daniel, Hewagama, Tilak, Holt, Carrie, Hviid, Stubbe, Iakubivskyi, Iaroslav, Inno, Laura, Irwin, Patrick, Ivanovski, Stavro, Jansky, Jiri, Jernej, Irmgard, Jeszenszky, Harald, Jimenéz, Jaime, Jorda, Laurent, Kama, Mihkel, Kameda, Shingo, Kelley, Michael S. P., Klepacki, Kamil, Kohout, Tomáš, Kojima, Hirotsugu, Kowalski, Tomasz, Kuwabara, Masaki, Ladno, Michal, Laky, Gunter, Lammer, Helmut, Lan, Radek, Lavraud, Benoit, Lazzarin, Monica, Le Duff, Olivier, Lee, Qiu-Mei, Lesniak, Cezary, Lewis, Zoe, Lin, Zhong-Yi, Lister, Tim, Lowry, Stephen, Magnes, Werner, Markkanen, Johannes, Martinez Navajas, Ignacio, Martins, Zita, Matsuoka, Ayako, Matyjasiak, Barbara, Mazelle, Christian, Mazzotta Epifani, Elena, Meier, Mirko, Michaelis, Harald, Micheli, Marco, Migliorini, Alessandra, Millet, Aude-Lyse, Moreno, Fernando, Mottola, Stefano, Moutounaick, Bruno, Muinonen, Karri, Müller, Daniel R., Murakami, Go, Murata, Naofumi, Myszka, Kamil, Nakajima, Shintaro, Nemeth, Zoltan, Nikolajev, Artiom, Nordera, Simone, Ohlsson, Dan, Olesk, Aire, Ottacher, Harald, Ozaki, Naoya, Oziol, Christophe, Patel, Manish, Savio Paul, Aditya, Penttilä, Antti, Pernechele, Claudio, Peterson, Joakim, Petraglio, Enrico, Piccirillo, Alice Maria, Plaschke, Ferdinand, Polak, Szymon, Postberg, Frank, Proosa, Herman, Protopapa, Silvia, Puccio, Walter, Ranvier, Sylvain, Raymond, Sean, Richter, Ingo, Rieder, Martin, Rigamonti, Roberto, Ruiz Rodriguez, Irene, Santolik, Ondrej, Sasaki, Takahiro, Schrödter, Rolf, Shirley, Katherine, Slavinskis, Andris, Sodor, Balint, Soucek, Jan, Stephenson, Peter, Stöckli, Linus, Szewczyk, Paweł, Troznai, Gabor, Uhlir, Ludek, Usami, Naoto, Valavanoglou, Aris, Vaverka, Jakub, Wang, Wei, Wang, Xiao-Dong, Wattieaux, Gaëtan, Wieser, Martin, Wolf, Sebastian, Yano, Hajime, Yoshikawa, Ichiro, Zakharov, Vladimir, Zawistowski, Tomasz, Zuppella, Paola, Rinaldi, Giovanna & Ji, Hantao, 2024, Space Science Reviews, 220, 9
10	Electrodynamical control of the ambient ionization near the equatorial anomaly crest in the Indian zone during counter electrojet days Hajra, R., Chakraborty, S. K. & Paul, A., 2009, Radio Science, 44, RS3009
10	Intense, Long-Duration Geomagnetically Induced Currents (GICs) Caused by Intense Substorm Clusters Hajra, Rajkumar, 2022, Space Weather, 20, e2021SW002937
9	Interplanetary Sheaths and Corotating Interaction Regions: A Comparative Statistical Study on Their Characteristics and Geoeffectiveness Hajra, Rajkumar, Sunny, Jibin V., Babu, Megha & Nair, Archana Giri, 2022, Solar Physics, 297, 97
8	Intense Geomagnetically Induced Currents (GICs): Association with Solar and Geomagnetic Activities Hajra, Rajkumar, 2022, Solar Physics, 297, 14
8	Evolution of equatorial irregularities under varying electrodynamical conditions: A multitechnique case study from Indian longitude zone Hajra, R., Chakraborty, S. K., Mazumdar, S. & Alex, S., 2012, Journal of Geophysical Research (Space Physics), 117, A08331
8	September 2017 Space-Weather Events: A Study on Magnetic Reconnection and Geoeffectiveness Hajra, Rajkumar, 2021, Solar Physics, 296, 50
7	The Structure and Microstructure of Rising-Tone Chorus With Frequencies Crossing at f ∼ 0.5 fce Chen, Rui, Tsurutani, Bruce T., Gao, Xinliang, Lu, Quanming, Chen, Huayue, Lakhina, Gurbax S. & Hajra, Rajkumar, 2022, Journal of Geophysical Research (Space Physics), 127, e30438
7	Ionospheric scintillation near the anomaly crest in relation to the variability of ambient ionization Chakraborty, S. K., Hajra, R. & Dasgupta, A., 2012, Radio Science, 47, RS2006
7	Variability of total electron content near the crest of the equatorial anomaly during moderate geomagnetic storms Chakraborty, S. K. & Hajra, R., 2010, Journal of Atmospheric and Solar-Terrestrial Physics, 72, 900
6	Solar control of ambient ionization of the ionosphere near the crest of the equatorial anomaly in the Indian zone Chakraborty, S. K. & Hajra, R., 2007, Bulletin of the Astronomical Society of India, 35, 599
6	Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations Hajra, Rajkumar, Tsurutani, Bruce T., Lakhina, Gurbax S., Lu, Quanming, Du, Aimin & Shan, Lican, 2023, ApJ, 951, 75
5	Solar flares observed by Rosetta at comet 67P/Churyumov-Gerasimenko Edberg, N. J. T., Johansson, F. L., Eriksson, A. I., Andrews, D. J., Hajra, R., Henri, P., Simon Wedlund, C., Alho, M. & Thiemann, E., 2019, A&A, 630, A49
5	Comment on "First Observation of Mesosphere Response to the Solar Wind High-Speed Streams" by W. Yi et al. Tsurutani, Bruce T., Hajra, Rajkumar, Echer, Ezequiel & Lakhina, Gurbax S., 2019, Journal of Geophysical Research (Space Physics), 124, 8165
4	Ionospheric effects near the magnetic equator and the anomaly crest of the Indian longitude zone during a large number of intense geomagnetic storms Hajra, R., Chakraborty, S. K. & Dasgupta, A., 2010, Journal of Atmospheric and Solar-Terrestrial Physics, 72, 1299
4	Equatorial ionospheric responses in relation to the occurrence of main phase of intense geomagnetic storms in the local dusk sector Hajra, R. & Chakraborty, S. K., 2011, Journal of Atmospheric and Solar-Terrestrial Physics, 73, 760
4	Seasonal dependence of the Earth's radiation belt - new insights Hajra, Rajkumar, 2021, Annales Geophysicae, 39, 181
4	Cometary plasma science Goetz, C., Gunell, H., Volwerk, M., Beth, A., Eriksson, A., Galand, M., Henri, P., Nilsson, H., Wedlund, C. Simon, Alho, M., Andersson, L., Andre, N., De Keyser, J., Deca, J., Ge, Y., Glassmeier, K. -H., Hajra, R., Karlsson, T., Kasahara, S., Kolmasova, I., LLera, K., Madanian, H., Mann, I., Mazelle, C., Odelstad, E., Plaschke, F., Rubin, M., Sanchez-Cano, B., Snodgrass, C. & Vigren, E., 2022, Experimental Astronomy, 54, 1129
3	Comparison of geophysical patterns in the southern hemisphere mid-latitude region Da Silva, L. A., Satyamurty, P., Alves, L. R., Souza, V. M., Jauer, P. R., Silveira, M. V. D., Echer, M. S., Hajra, R., Medeiros, C., Marchezi, J. P., Rockenbach, M., Rigozo, N. R., Denardini, C. M., Mendes, O., Dal Lago, A. & Vieira, L. E. A., 2016, Advances in Space Research, 58, 2090
3	Extremely Slow (V sw < 300 km s-1) Solar Winds (ESSWs) at 1 au: Causes of Extreme Geomagnetic Quiet at Earth Tsurutani, Bruce T. & Hajra, Rajkumar, 2022, ApJ, 936, 155
3	Solar-Wind High-Speed Stream (HSS) Alfvén Wave Fluctuations at High Heliospheric Latitudes: Ulysses Observations During Two Solar-Cycle Minima Echer, Ezequiel, Franco, Adriane Marques de Souza, da Costa Junior, Edio, Hajra, Rajkumar & Bolzan, Mauricio José Alves, 2022, Solar Physics, 297, 143
3	A comparative study on geoeffective and non-geoeffective corotating interaction regions Sunny, Jibin V., Nair, Archana Giri, Babu, Megha & Hajra, Rajkumar, 2023, Advances in Space Research, 71, 268
3	Near-Earth High-Speed and Slow Solar Winds: A Statistical Study on Their Characteristics and Geomagnetic Impacts Hajra, Rajkumar, 2023, Solar Physics, 298, 53
3	Ultra-relativistic Electron Acceleration during High-intensity Long-duration Continuous Auroral Electrojet Activity Events Hajra, Rajkumar, Tsurutani, Bruce T., Lu, Quanming, Lakhina, Gurbax S., Du, Aimin, Echer, Ezequiel, Franco, Adriane M. S., Bolzan, Mauricio J. A. & Gao, Xinliang, 2024, ApJ, 965, 146
3	Interplanetary Causes and Impacts of the 2024 May Superstorm on the Geosphere: An Overview Hajra, Rajkumar, Tsurutani, Bruce Tsatnam, Lakhina, Gurbax Singh, Lu, Quanming & Du, Aimin, 2024, ApJ, 974, 264
3	Geomagnetically induced currents (GICs) during strong geomagnetic activity (storms, substorms, and magnetic pulsations) on 23–24 April 2023 Despirak, Irina, Setsko, Pavel, Lubchich, Andris, Hajra, Rajkumar, Sakharov, Yaroslav, Lakhina, Gurbax, Selivanov, Vasiliy & Tsurutani, Bruce Tsatnam, 2024, Journal of Atmospheric and Solar-Terrestrial Physics, 261, 106293
3	Ionospheric total electron content of comet 67P/Churyumov-Gerasimenko Hajra, Rajkumar, Henri, Pierre, Vallières, Xavier, Galand, Marina, Rubin, Martin, Tsurutani, Bruce T., Gilet, Nicolas, Bucciantini, Luca & Nemeth, Zoltan, 2020, A&A, 635, A51
2	Identification of the planetary magnetosphere boundaries with the wavelet multi-resolution analysis Bolzan, Mauricio José Alves, Echer, Ezequiel, de Souza Franco, Adriane Marques & Hajra, Rajkumar, 2022, Journal of Atmospheric and Solar-Terrestrial Physics, 230, 105842
2	Comments on "New Insights From the 2003 Halloween Storm Into the Colaba 1600 nT Magnetic Depression During the 1859 Carrington Storm" by S. Ohtani (2022) Tsurutani, Bruce T., Lakhina, Gurbax S. & Hajra, Rajkumar, 2023, Journal of Geophysical Research (Space Physics), 128, e2022JA031034
2	Geomagnetic Activity Following Interplanetary Shocks in Solar Cycles 23 and 24 Echer, Ezequiel, Lucas, Aline de, Hajra, Rajkumar, Franco, Adriane Marques de Souza, Bolzan, Mauricio J. A. & Nascimento, Luis Eduardo Sales do, 2023, Brazilian Journal of Physics, 53, 79
2	Plasma distribution around Comet 67P in the last month of the Rosetta mission Nemeth, Z., Timar, A., Szego, K., Henri, P., Hajra, R. & Wattieaux, G., 2020, Icarus, 350, 113924
2	Review of the August 1972 and March 1989 (Allen) Space Weather Events: Can We Learn Anything New From Them? Tsurutani, Bruce T., Sen, Abhijit, Hajra, Rajkumar, Lakhina, Gurbax S., Horne, Richard B. & Hada, Tohru, 2024, Journal of Geophysical Research (Space Physics), 129, e2024JA032622
1	Earth's magnetotail variability during supersubstorms (SSSs): A study on solar wind-magnetosphere-ionosphere coupling Hajra, Rajkumar, Echer, Ezequiel, Franco, Adriane Marques de Souza & Bolzan, Mauricio José Alves, 2023, Advances in Space Research, 72, 1208
1	The April 2023 SYM-H = −233 nT Geomagnetic Storm: A Classical Event Hajra, Rajkumar, Tsurutani, Bruce Tsatnam, Lu, Quanming, Horne, Richard B., Lakhina, Gurbax Singh, Yang, Xu, Henri, Pierre, Du, Aimin, Gao, Xingliang, Wang, Rongsheng & Lu, San, 2024, Journal of Geophysical Research (Space Physics), 129, e2024JA032986
1	The Interplanetary and Magnetospheric causes of Geomagnetically Induced Currents (GICs) > 10 A in the Mäntsälä Finland Pipeline: 1999 through 2019 - Erratum Tsurutani, Bruce T. & Hajra, Rajkumar, 2021, Journal of Space Weather and Space Climate, 11, 32
1	Three-Dimensional Global Hybrid Simulations of Mercury's Disappearing Dayside Magnetosphere Guo, Jin, Lu, San, Lu, Quanming, Slavin, James A., Sun, Weijie, Ren, Junyi, Wang, Xueyi, Lin, Yu, Hajra, Rajkumar & Wang, Rongsheng, 2023, Journal of Geophysical Research (Planets), 128, e2023JE008032
1	Predicting Interplanetary Shock Occurrence for Solar Cycle 25: Opportunities and Challenges in Space Weather Research Oliveira, Denny M., Allen, Robert C., Alves, Livia R., Blake, Séan P., Carter, Brett A., Chakrabarty, Dibyendu, D'Angelo, Giulia, Delano, Kevin, Echer, Ezequiel, Ferradas, Cristian P., Finley, Matt G., Gallardo-Lacourt, Bea, Gershman, Dan, Gjerloev, Jesper W., Habarulema, John Bosco, Hartinger, Michael D., Hajra, Rajkumar, Hayakawa, Hisashi, Juusola, Liisa, Laundal, Karl M., Leamon, Robert J., Madelaire, Michael, Martínez-Ledesma, Miguel, McIntosh, Scott M., Miyoshi, Yoshizumi, Moldwin, Mark B., Nahayo, Emmanuel, Nandy, Dibyendu, Nilam, Bhosale, Nykyri, Katariina, Paterson, William R., Piersanti, Mirko, Pietropaolo, Ermanno, Rodger, Craig J., Shah, Trunali, Smith, Andy W., Srivastava, Nandita, Tsurutani, Bruce T., Ram, S. Tulasi, Upton, Lisa A., Veenadhari, Bhaskara, Vidal-Luengo, Sergio, Viljanen, Ari, Vines, Sarah K., Yadav, Vipin K., Yee, Jeng-Hwa, Weygand, James W. & Zesta, Eftyhia, 2024, Space Weather, 22, e2024SW003964
0	Revisiting the Superstorm on 6–7 April 2000 Caused by an Extraordinary Corotating Interaction Region (With an Embedded Coronal Jet?) Tsurutani, Bruce T., Hajra, Rajkumar, Lakhina, Gurbax & Meng, Xing, 2024, Journal of Geophysical Research (Space Physics), 129, 2024JA032989
0	Prompt Disappearance of Magnetospheric Chorus Waves Caused by High-Speed Magnetosheath Jets Zhou, Xuan, Gao, Xinliang, Lu, Quanming, Hajra, Rajkumar, Ke, Yangguang, Chen, Rui & Ma, Jiuqi, 2024, Journal of Geophysical Research (Space Physics), 129, e2024JA032576
0	Study of Neptune dayside magnetosheath fluctuations during Voyager-2 flyby Echer, Ezequiel, de Souza Franco, Adriane Marques, Magalhães, Fabíola Pinho, Bolzan, Mauricio J. A. & Hajra, Rajkumar, 2023, Advances in Space Research, 71, 3468
0	Extreme Rarefaction of Solar Wind: A Study on Origin and Characteristics Using Ulysses Observations Hajra, Rajkumar, Tsurutani, Bruce T., Lu, Quanming, Shan, Lican, Du, Aimin, Wang, Rongsheng, Lu, San & Gao, Xinliang, 2023, ApJ, 955, 120