Browsing by Author "Hajra, Rajkumar"

Browsing by Author "Hajra, Rajkumar"

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  • 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, G.S.; Echer, Ezequiel; Hajra, Rajkumar; Nayak, Chinmaya; Mannucci, Anthony J.; Meng, Xing (2018)
    An alternative scenario to the Ngwira et al. (2014, https://doi.org/10.1002/2013JA019661) high sheath densities is proposed for modeling the Carrington magnetic storm. Typical slow solar wind densities (~5 cm 3) and lower ...
  • Complex space weather events of 2017 September 
    Hajra, Rajkumar; Tsurutani, Bruce T.; Lakhina, G.S. (2020)
    Interplanetary coronal mass ejections (ICMEs), magnetic clouds (MCs), sheaths, corotating interaction regions (CIRs), solar wind high-speed streams (HSSs), fast forward shocks (FSs), reverse waves (RWs), stream interfaces, ...
  • Interplanetary shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations 
    Hajra, Rajkumar; Tsurutani, Bruce T.; Lakhina, G. S.; Lu, Quanming; Du, Aimin; Shan, Lican (2023)
    The Helios 1 (H1) and Helios 2 (H2) spacecraft measured the solar winds at a distance between ∼0.3 and 1.0 au from the Sun. With increasing heliocentric distance (rh), the plasma speed is found to increase at ∼34–40 km ...
  • 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)
    Three lower‐band (f< 0.5 fce) chorus riser elements detected in the dayside generation region were studied in detail using the Van Allen Probe data. Two subelements/wave packets within each riser were examined for their ...
  • Plasmaspheric Hiss: Coherent and Intense 
    Tsurutani, Bruce T.; Park, Sang A.; Falkowski, Barbara J.; Lakhina, Gurbax S.; Pickett, Jolene S.; Bortnik, Jacob; Hospodarsk, George; Santolik, Ondrej; Parrot, Michel; Henri, Pierre; Hajra, Rajkumar (2018)
    Intense ~300-Hz to 1.0-kHz plasmaspheric hiss was studied using Polar plasma wave data. It is found that the waves are coherent in all local time sectors with the wave coherency occurring in approximately three- to ...
  • 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 (2022)
    Owing to the ever-present solar wind, our vast solar system is full of plasmas. The turbulent solar wind, together with sporadic solar eruptions, introduces various space plasma processes and phenomena in the solar ...
  • 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)
    Intense, midnight-to-dawn sector, near-equatorial, chorus rising tones which cross frequencies of_0.5_ce have been analyzed to determine their structures and possible substructures. Upper 𝐴𝐴band (𝐴𝐴 ≥ 0.5𝑓𝑓ce ) chorus ...