publications

publications by categories in reversed chronological order. generated by jekyll-scholar.

2025

  1. chu2025imbalanced.jpg
    Imbalanced Regression Artificial Neural Network Model for Auroral Electrojet Indices (IRANNA): Can We Predict Strong Events?
    Xiangning Chu, Lucas Jia, Robert L McPherron, and 2 more authors
    Space Weather, 2025
  2. bishop2025superposed.jpg
    A superposed epoch analysis of two stage refilling in the plasmasphere
    Tyler Bishop, Lauren Blum, Xiangning Chu, and 1 more author
    Geophysical Research Letters, 2025
  3. huang2025temperature.jpg
    The Temperature Anisotropy and Helium Abundance Features of Alfvénic Slow Solar Wind Observed by Parker Solar Probe, Helios, and Wind Missions
    Jia Huang, Davin E Larson, Tamar Ervin, and 8 more authors
    The Astrophysical Journal Letters, 2025

2024

  1. ma2024machine.png
    Machine learning interpretability of outer radiation belt enhancement and depletion events
    Donglai Ma, Jacob Bortnik, Qianli Ma, and 2 more authors
    Geophysical Research Letters, 2024
  2. cao2024science.jpeg
    Science return of probing magnetospheric systems of ice giants
    Xin Cao, Xiangning Chu, Hsiang-Wen Hsu, and 8 more authors
    Frontiers in astronomy and space sciences, 2024
  3. su2024electron.jpg
    Electron density specification in the inner magnetosphere from the narrow band receiver onboard DSX
    Yi-Jiun Su, John A Carilli, J Brent Parham, and 3 more authors
    Radio Science, 2024
  4. li2024fine.jpg
    Fine structure of magnetospheric magnetosonic waves: 1. Elementary rising-tone emissions within individual harmonic
    Jinxing Li, Jacob Bortnik, Sheng Tian, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2024
  5. shen2024large.jpg
    Large amplitude whistler waves in Earth’s plasmasphere and plasmaspheric plumes
    Xiao-Chen Shen, Wen Li, Qianli Ma, and 5 more authors
    Geophysical Research Letters, 2024
  6. ma2024simulating.jpg
    Simulating the Earth’s outer radiation belt electron fluxes and their upper limit: A unified physics-based model driven by the AL index
    Donglai Ma, Jacob Bortnik, Qianli Ma, and 2 more authors
    Geophysical Research Letters, 2024
  7. huang2024modeling.jpg
    Modeling global electron precipitation driven by whistler mode waves: Integrating physical and deep learning approaches
    Sheng Huang, Wen Li, Qianli Ma, and 3 more authors
    Journal of Geophysical Research: Space Physics, 2024
  8. chu2024imbalanced.jpg
    Imbalanced regressive neural network model for whistler-mode hiss waves: Spatial and temporal evolution
    Xiangning Chu, Jacob Bortnik, Xiao-Chen Shen, and 6 more authors
    Journal of Geophysical Research: Space Physics, 2024

2023

  1. ma2023opening.jpeg
    Opening the black box of the radiation belt machine learning model
    Donglai Ma, Jacob Bortnik, Xiangning Chu, and 3 more authors
    Space Weather, 2023
  2. ripoll2023modeling.jpg
    Modeling of the cold electron plasma density for radiation belt physics
    J-F Ripoll, V Pierrard, Gregory Scott Cunningham, and 8 more authors
    Frontiers in Astronomy and Space Sciences, 2023
  3. li2023modeling.jpeg
    Modeling ring current proton fluxes using artificial neural network and Van Allen Probe measurements
    Jinxing Li, Jacob Bortnik, Xiangning Chu, and 5 more authors
    Space Weather, 2023
  4. huang2023deep.jpg
    Deep learning model of hiss waves in the plasmasphere and plumes and their effects on radiation belt electrons
    Sheng Huang, Wen Li, Qianli Ma, and 7 more authors
    Frontiers in Astronomy and Space Sciences, 2023
  5. ma2023evaluating.jpg
    Evaluating the performance of empirical models of total electron density and whistler-mode wave amplitude in the Earth’s inner magnetosphere
    Qianli Ma, Xiangning Chu, Donglai Ma, and 4 more authors
    Frontiers in Astronomy and Space Sciences, 2023
  6. cao2023science.png
    Science Return of Probing Magnetospheric Systems of Ice Giants
    Xin Cao, Xiangning Chu, Hsiang-Wen Hsu, and 8 more authors
    Bulletin of the AAS, 2023
  7. cao2023response.jpeg
    The Response of Ionospheric Currents to External Drivers Investigated Using a Neural Network-Based Model
    Xin Cao, Xiangning Chu, Jacob Bortnik, and 4 more authors
    Space Weather, 2023
  8. chu2023distribution.jpeg
    Distribution and evolution of chorus waves modeled by a neural network: The importance of imbalanced regression
    Xiangning Chu, Jacob Bortnik, Wen Li, and 5 more authors
    Space Weather, 2023
  9. aryan2023statistical.jpeg
    A statistical analysis of the auroral streamer current system
    Homayon Aryan, James Michael Weygand, Jacob Bortnik, and 3 more authors
    Journal of Geophysical Research: Space Physics, 2023

2022

  1. ma2022modeling.jpg
    Modeling the dynamic variability of sub-relativistic outer radiation belt electron fluxes using machine learning
    Donglai Ma, Xiangning Chu, Jacob Bortnik, and 6 more authors
    Space Weather, 2022
  2. aryan2022multiple.png
    Multiple conjugate observations of magnetospheric fast flow bursts using THEMIS observations
    Homayon Aryan, Jacob Bortnik, Jinxing Li, and 3 more authors
    In Annales Geophysicae, 2022
  3. malaspina2022plasma.jpg
    Plasma imaging, LOcal measurement, and tomographic experiment (pilot): A mission concept for transformational multi-scale observations of mass and energy flow dynamics in Earth’s magnetosphere
    David Malaspina, Robert Ergun, Jerry Goldstein, and 8 more authors
    Frontiers in Astronomy and Space Sciences, 2022
  4. huang2022application.png
    Application of recurrent neural network to modeling Earth’s global electron density
    Sheng Huang, Wen Li, Xiao-Chen Shen, and 7 more authors
    Journal of Geophysical Research: Space Physics, 2022
  5. grimes2022space.jpg
    The space physics environment data analysis system in python
    Eric W Grimes, Bryan Harter, Nick Hatzigeorgiu, and 8 more authors
    Frontiers in Astronomy and Space Sciences, 2022
  6. weygand2022magnetosphere.jpg
    Magnetosphere-ionosphere coupling between north-south propagating streamers and high-speed earthward flows
    JM Weygand, J Bortnik, X Chu, and 4 more authors
    Journal of Geophysical Research: Space Physics, 2022
  7. hua2022unraveling.jpg
    Unraveling the critical geomagnetic conditions controlling the upper limit of electron fluxes in the Earth’s outer radiation belt
    Man Hua, Jacob Bortnik, Xiangning Chu, and 2 more authors
    Geophysical Research Letters, 2022

2021

  1. chu2021magnetotail.jpg
    Magnetotail flux accumulation leads to substorm current wedge formation: A case study
    Xiangning Chu, Robert McPherron, Tung-Shin Hsu, and 4 more authors
    Journal of Geophysical Research: Space Physics, 2021
  2. li2021characteristics.jpg
    Characteristics of substorm-onset-related and nonsubstorm earthward fast flows and associated magnetic flux transport: THEMIS observations
    Jinxing Li, Xiangning Chu, Jacob Bortnik, and 5 more authors
    Journal of Geophysical Research: Space Physics, 2021
  3. shen2021realistic.jpg
    Realistic electron diffusion rates and lifetimes due to scattering by electron holes
    Yangyang Shen, Ivan Y Vasko, Anton Artemyev, and 4 more authors
    Journal of Geophysical Research: Space Physics, 2021
  4. stepanov2021ionospheric.jpg
    Ionospheric electron density and conductance changes in the auroral zone during substorms
    NA Stepanov, VA Sergeev, MA Shukhtina, and 3 more authors
    Journal of Geophysical Research: Space Physics, 2021
  5. chu2021relativistic.jpg
    Relativistic electron model in the outer radiation belt using a neural network approach
    Xiangning Chu, Donglai Ma, Jacob Bortnik, and 8 more authors
    Space Weather, 2021
  6. tsyganenko2021reconstructing.jpg
    Reconstructing substorms via historical data mining: Is it really feasible?
    NA Tsyganenko, VA Andreeva, MI Sitnov, and 4 more authors
    Journal of Geophysical Research: Space Physics, 2021
  7. ace2021plasmaspheric.jpg
    Plasmaspheric dynamics studied using a three-dimensional machine learning-based plasma density model in the inner magnetosphere and the ionosphere
    Hannah Ace
    2021

2020

  1. haiducek2020using.jpg
    Using multiple signatures to improve accuracy of substorm identification
    John D Haiducek, Daniel T Welling, Steven K Morley, and 2 more authors
    Journal of Geophysical Research: Space Physics, 2020
  2. wang2020inward.jpg
    Inward propagation of flow-generated Pi2 waves from the plasma sheet to the inner magnetosphere
    Chih-Ping Wang, Xiaoyan Xing, Jacob Bortnik, and 1 more author
    Journal of Geophysical Research: Space Physics, 2020
  3. chu2020morphological.jpg
    Morphological characteristics of strong thermal emission velocity enhancement emissions
    Xiangning Chu, Lukas Wolter, David Malaspina, and 4 more authors
    Journal of Geophysical Research: Space Physics, 2020

2019

  1. camporeale2019generation.jpg
    On the generation of probabilistic forecasts from deterministic models
    Enrico Camporeale, Xiangning Chu, OV Agapitov, and 1 more author
    Space weather, 2019
  2. fletcher2019kinetic.jpg
    Kinetic equilibrium and stability analysis of dipolarization fronts
    Alex C Fletcher, Chris Crabtree, Gurudas Ganguli, and 3 more authors
    Journal of Geophysical Research: Space Physics, 2019
  3. chu2019identifying.jpg
    Identifying STEVE’s magnetospheric driver using conjugate observations in the magnetosphere and on the ground
    Xiangning Chu, David Malaspina, Bea Gallardo-Lacourt, and 8 more authors
    Geophysical Research Letters, 2019
  4. liang2019optical.jpg
    Optical spectra and emission altitudes of double-layer STEVE: A case study
    Jun Liang, E Donovan, M Connors, and 6 more authors
    Geophysical Research Letters, 2019
  5. khoo2019sudden.jpg
    How sudden, intense energetic electron enhancements correlate with the innermost plasmapause locations under various solar wind drivers and geomagnetic conditions
    L-Y Khoo, X Li, H Zhao, and 3 more authors
    Journal of Geophysical Research: Space Physics, 2019

2018

  1. malaspina2018census.jpg
    A census of plasma waves and structures associated with an injection front in the inner magnetosphere
    David M Malaspina, Aleksandr Ukhorskiy, Xiangning Chu, and 1 more author
    Journal of Geophysical Research: Space Physics, 2018
  2. ma2018quantitative.jpg
    Quantitative evaluation of radial diffusion and local acceleration processes during GEM challenge events
    Q Ma, W Li, J Bortnik, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2018
  3. mcpherron2018relation.jpg
    Relation of field-aligned currents measured by the network of Iridium\textregistered spacecraft to solar wind and substorms
    RL McPherron, BJ Anderson, and Xiangning Chu
    Geophysical Research Letters, 2018
  4. liu2018current.png
    The current system of dipolarizing flux bundles and their role as wedgelets in the substorm current wedge
    Jiang Liu, V Angelopoulos, Zhonghua Yao, and 3 more authors
    Electric currents in geospace and beyond, 2018
  5. mcpherron2018midlatitude.jpg
    The midlatitude positive bay index and the statistics of substorm occurrence
    Robert L McPherron and Xiangning Chu
    Journal of Geophysical Research: Space Physics, 2018
  6. bortnik2018artificial.jpg
    Artificial neural networks for determining magnetospheric conditions
    Jacob Bortnik, Xiangning Chu, Qianli Ma, and 8 more authors
    In Machine learning techniques for space weather, 2018
  7. malaspina2018variation.jpg
    Variation in plasmaspheric hiss wave power with plasma density
    David M Malaspina, Jean-Francois Ripoll, Xiangning Chu, and 2 more authors
    Geophysical Research Letters, 2018
  8. mcpherron2018mid.jpg
    The mid-latitude positive bay and the mpb index of substorm activity
    Robert L McPherron and Xiangning Chu
    Earth’s Magnetic Field, 2018

2017

  1. mcpherron2017mid.jpg
    The mid-latitude positive bay and the MPB index of substorm activity
    Robert L McPherron and Xiangning Chu
    Space Science Reviews, 2017
  2. li2017coherently.jpg
    Coherently modulated whistler mode waves simultaneously observed over unexpectedly large spatial scales
    Jinxing Li, Jacob Bortnik, Wen Li, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2017
  3. wang2017effects.jpg
    Effects of solar wind ultralow-frequency fluctuations on plasma sheet electron temperature: Regression analysis with support vector machine
    Chih-Ping Wang, Hee-Jeong Kim, Chao Yue, and 3 more authors
    Journal of Geophysical Research: Space Physics, 2017
  4. chu2017erosion.jpg
    Erosion and refilling of the plasmasphere during a geomagnetic storm modeled by a neural network
    XN Chu, J Bortnik, W Li, and 3 more authors
    Journal of Geophysical Research: Space Physics, 2017
  5. chu2017neural.jpg
    A neural network model of three-dimensional dynamic electron density in the inner magnetosphere
    X Chu, J Bortnik, W Li, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2017
  6. liu2017ultralow.jpg
    Ultralow frequency waves deep inside the inner magnetosphere driven by dipolarizing flux bundles
    Jiang Liu, Vassilis Angelopoulos, X-J Zhang, and 7 more authors
    Journal of Geophysical Research: Space Physics, 2017

2016

  1. mcpherron2016relation.webp
    Relation of the auroral substorm to the substorm current wedge
    Robert L McPherron and Xiangning Chu
    Geoscience Letters, 2016
  2. liu2016distribution.jpg
    Distribution of Region 1 and 2 currents in the quiet and substorm time plasma sheet from THEMIS observations
    Jiang Liu, V Angelopoulos, Xiangning Chu, and 1 more author
    Geophysical Research Letters, 2016

2015

  1. chu2015magnetic.jpg
    Magnetic mapping effects of substorm currents leading to auroral poleward expansion and equatorward retreat
    Xiangning Chu, Robert L McPherron, Tung-Shin Hsu, and 5 more authors
    Journal of Geophysical Research: Space Physics, 2015
  2. mcpherron2015optimum.jpg
    An optimum solar wind coupling function for the AL index
    Robert L McPherron, Tung-Shin Hsu, and Xiangning Chu
    Journal of Geophysical Research: Space Physics, 2015
  3. liu2015substorm.jpg
    Substorm current wedge composition by wedgelets
    Jiang Liu, V Angelopoulos, Xiangning Chu, and 2 more authors
    Geophysical Research Letters, 2015
  4. chu2015solar.jpg
    Solar cycle dependence of substorm occurrence and duration: Implications for onset
    Xiangning Chu, Robert L McPherron, Tung-Shin Hsu, and 1 more author
    Journal of Geophysical Research: Space Physics, 2015
  5. yao2015physical.png
    A physical explanation for the magnetic decrease ahead of dipolarization fronts
    ZH Yao, J Liu, CJ Owen, and 8 more authors
    In Annales Geophysicae, 2015
  6. connors2015february.webp
    The February 24, 2010 substorm: a refined view involving a pseudobreakup/expansive phase/poleward boundary intensification sequence
    Martin Connors, Christopher T Russell, Xiangning Chu, and 1 more author
    Earth, Planets and Space, 2015
  7. chu2015configuration.jpg
    Configuration and generation of substorm current wedge
    Xiangning Chu
    University of California, Los Angeles, 2015

2014

  1. chu2014development.jpg
    Development and validation of inversion technique for substorm current wedge using ground magnetic field data
    Xiangning Chu, Tung-Shin Hsu, Robert L McPherron, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2014
  2. connors2014electric.jpg
    Electric currents of a substorm current wedge on 24 February 2010
    Martin Connors, Robert L McPherron, Brian J Anderson, and 3 more authors
    Geophysical Research Letters, 2014
  3. yao2014current.jpg
    Current reduction in a pseudo-breakup event: THEMIS observations
    ZH Yao, ZY Pu, CJ Owen, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2014
  4. yao2014pressure.png
    Pressure gradient evolution in the near-Earth magnetotail at the arrival of BBFs
    Zhonghua Yao, Zuyin Pu, Aimin Du, and 8 more authors
    Chinese Science Bulletin, 2014

2013

  1. mcpherron2013changes.jpg
    Changes in solar wind–magnetosphere coupling with solar cycle, season, and time relative to stream interfaces
    Robert L McPherron, Daniel N Baker, TI Pulkkinen, and 3 more authors
    Journal of Atmospheric and Solar-Terrestrial Physics, 2013
  2. yao2013conjugate.jpg
    Conjugate observations of flow diversion in the magnetotail and auroral arc extension in the ionosphere
    ZH Yao, V Angelopoulos, ZY Pu, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2013
  3. yao2013current.jpg
    Current structures associated with dipolarization fronts
    Zhonghua Yao, WJ Sun, SY Fu, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2013

2012

  1. kissinger2012necessity.webp
    Necessity of substorm expansions in the initiation of steady magnetospheric convection
    J Kissinger, RL McPherron, T-S Hsu, and 2 more authors
    Geophysical research letters, 2012
  2. hsu2012statistical.webp
    A statistical analysis of the association between fast plasma flows and Pi2 pulsations
    Tung-Shin Hsu, RL McPherron, Vassilis Angelopoulos, and 5 more authors
    Journal of Geophysical Research: Space Physics, 2012

2011

  1. mcpherron2011characteristics.webp
    Characteristics of plasma flows at the inner edge of the plasma sheet
    RL McPherron, T-S Hsu, J Kissinger, and 2 more authors
    Journal of Geophysical Research: Space Physics, 2011

2010

  1. pu2010themis.webp
    THEMIS observations of substorms on 26 February 2008 initiated by magnetotail reconnection
    ZY Pu, XN Chu, X Cao, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2010
  2. chu2010themis.jpg
    THEMIS observations of two substorms on February 26, 2008
    XiangNing Chu, ZuYin Pu, Xin Cao, and 8 more authors
    Science China Technological Sciences, 2010

2009

  1. wei2009westward.webp
    Westward ionospheric electric field perturbations on the dayside associated with substorm processes
    Y Wei, Z Pu, M Hong, and 8 more authors
    Journal of Geophysical Research: Space Physics, 2009