All Stories

  1. Quasi‐Periodic X‐Ray Variations at BARREL: Role of Electron Precipitation and Solar Wind Driving

    Article • Journal of Geophysical Research Space Physics, July 2026, American Geophysical Union (AGU)

    Dr Alexa J Halford

  2. Artificial Intelligence Modeling Framework for Advancing Heliophysics Research (AIMFAHR)

    Article • March 2026, Copernicus GmbH

    Dr Alexa J Halford

  3. Breaking Down the Wall That Historically Separates the Atmosphere, Ionosphere, and Magnetosphere (AIM) Communities: AGU Chapman Conference on AIM Coupling

    Article • Perspectives of Earth and Space Scientists, September 2025, American Geophysical Union (AGU)

    Dr Alexa J Halford

  4. (Un)Explained EMIC Waves: Understanding Quiet Time EMIC Wave Drivers

    Article • Journal of Geophysical Research Space Physics, August 2025, American Geophysical Union (AGU)

    Dr Alexa J Halford

  5. Precipitation of Energetic Particles from Magnetosphere and Their Effects on the Atmosphere: An ISSI Team Meeting Review

    Article • June 2025, Wiley

    Dr Alexa J Halford

  6. Generation of Coincident EMIC and Whistler Mode Waves by Solar Wind Compression

    Article • May 2025, Wiley

    Dr Alexa J Halford

  7. Guide for Conducting “Community Challenges” in Space Physics

    Article • Earth and Space Science, May 2025, American Geophysical Union (AGU)

    Dr Alexa J Halford

  8. Observations of electron precipitation correlated with drift echoes

    Article • March 2025, Copernicus GmbH

    Dr Alexa J Halford

  9. Working towards more equitable  recomendations and nomination letters: Equitable Letters for Space and Physics

    Article • March 2025, Copernicus GmbH

    Dr Alexa J Halford

  10. Chapman conference: Particle Precipitation: Drivers, Properties, and Impacts on Atmosphere, Ionosphere, Magnetosphere (AIM) Coupling – Feb 2025 at RMIT in Melbourne, AU

    Article • January 2025, Copernicus GmbH

    Dr Alexa J Halford

  11. Magnetospheric Auroral Asymmetry eXplorer: observing the auroral to uncover how energy flows in space - A Phase A SMEX Mission concept

    Article • January 2025, Copernicus GmbH

    Dr Alexa J Halford

  12. Statistical Analysis of EMIC waves and Particle Fluxes using POES and Van Allen Probes

    Article • January 2025, Copernicus GmbH

    Dr Alexa J Halford

  13. Understanding and Modeling the Dynamics of Storm‐Time Atmospheric Neutral Density Using Random Forests

    Article • Space Weather, January 2025, American Geophysical Union (AGU)

    Dr Alexa J Halford

  14. Guide for Conducting "Community Challenges" in Space Physics

    Article • December 2024, Wiley

    Dr Alexa J Halford

  15. A Multi‐Platform Statistical Analysis of the Azimuthal Spatial Extent of the Microburst Precipitation Region

    Article • Journal of Geophysical Research Space Physics, December 2024, American Geophysical Union (AGU)

    Dr Alexa J Halford

  16. Additions to Space Physics Data Facility and pysatNASA: Increasing Mars Global Surveyor and Mars Atmosphere and Volatile EvolutioN Dataset Utility

    Article • Data, November 2024, MDPI AG

    Dr Alexa J Halford

  17. A Survey of EMIC Waves in Van Allen Probe Data

    Article • Journal of Geophysical Research Space Physics, August 2024, American Geophysical Union (AGU)

    Dr Alexa J Halford

  18. A survey of EMIC waves in Van Allen Probe data

    Article • July 2024, Wiley

    Dr Alexa J Halford

  19. Field‐Aligned Currents Associated With Pulsating Auroral Patches: Observation With Magneto‐Impedance Magnetometer (MIM) Onboard Loss Through Auroral Microburst Pulsations (LAMP) Sounding Rocket

    Article • Journal of Geophysical Research Space Physics, May 2024, American Geophysical Union (AGU)

    Dr Alexa J Halford

  20. Editorial: The future of space physics 2022

    Article • Frontiers in Astronomy and Space Sciences, April 2024, Frontiers

    Dr Alexa J Halford

  21. Understanding and Modeling the Dynamics of Storm-time Atmospheric Neutral Density using Random Forests

    Article • March 2024, Wiley

    Dr Alexa J Halford

  22. Persistent Pitch Angle Anisotropies of Relativistic Electrons in the Outer Radiation Belts

    Article • Journal of Geophysical Research Space Physics, December 2023, American Geophysical Union (AGU)

    Dr Alexa J Halford

  23. Simultaneous Precipitation of Sub‐Relativistic Electron Microburst and Pulsating Aurora Electrons

    Article • Geophysical Research Letters, December 2023, American Geophysical Union (AGU)

    Dr Alexa J Halford

  24. Recognition for All: A Way Forward to Enhance Diversity, Equity and Inclusion in Space Physics

    Article • September 2023, American Astronomical Society

    Dr Alexa J Halford

  25. Will we find Martian lightning via Schumann resonances?

    Article • Frontiers in Astronomy and Space Sciences, September 2023, Frontiers

    Dr Alexa J Halford

  26. The importance of recruitment and retention in Heliophysics: it’s not just a pipeline problem

    Article • Frontiers in Astronomy and Space Sciences, August 2023, Frontiers

    Chuanfei Dong, Dr Alexa J Halford

  27. Observation of an Electron Microburst With an Inverse Time‐Of‐Flight Energy Dispersion

    Article • Geophysical Research Letters, August 2023, American Geophysical Union (AGU)

    Dr Alexa J Halford

  28. Understanding Quiet and Storm Time EMIC Waves—Van Allen Probes Results

    Article • Journal of Geophysical Research Space Physics, August 2023, American Geophysical Union (AGU)

    Dr Alexa J Halford

  29. The importance of extreme dynamic signatures in the sub-auroral region

    Article • July 2023, American Astronomical Society

    Evan G Thomas, Dr Alexa J Halford

  30. Developing standards, metrics, and systematic approaches for improved model performance verification and validation

    Article • July 2023, American Astronomical Society

    Dr Adam C Kellerman, Dr Alexa J Halford

  31. Space Weather Mission Extensions: A new look at life extensions and the senior review

    Article • July 2023, American Astronomical Society

    Dr Adam C Kellerman, Dr Alexa J Halford

  32. Using the Application Usability Levels for tracking the health of Heliophysics

    Article • July 2023, American Astronomical Society

    Dr Adam C Kellerman, Dr Alexa J Halford

  33. AUL Development Ecosystem

    Article • July 2023, American Astronomical Society

    Dr Adam C Kellerman, Dr Alexa J Halford

  34. Recommendations on Funding Mission Operations and Historical Datasets

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  35. The Next Decade of Sounding Rockets that will lead the next 40 years of NASA Heliophysics missions

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  36. Space Weather Operations and the need for Multiple Solar Observational Vantage Points

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  37. Understanding the properties, wave drivers, and impacts of electron microburst precipitation: current understanding and critical knowledge gaps

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  38. A system science perspective of the drivers of equatorial plasma bubbles

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  39. Cross-Scale and Cross-Regime Coupling in the ITM: Studying Weather, not just Climate, in the Middle and Upper Atmosphere

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  40. Data Needs to be …

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  41. Artemis, Gateway, the return to the Moon and forward to Mars for Heliophysics

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  42. Mentorship within Heliophysics

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  43. The need for a Solar and Space Physics Knowledge Commons

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  44. Responsible Machine Learning in Heliophysics

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  45. Expanding the Deep Space Network to support the Heliophysics System Observatory

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  46. An Inclusive Heliophysics Community

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  47. The need for reference-able and peer reviewed position papers

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  48. Raising Awareness on Mental Health in the Heliophysics Community

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  49. This is a cry for help

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  50. The Importance of Policies: It’s not just a pipeline problem

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  51. A Strategic Vision for Understanding Inter-Hemispheric Asymmetries

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  52. The Impacts of Lightning Beyond the Troposphere

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  53. Improved Observations and Modeling for Aviation Radiation

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  54. Expanding Heliophysics to Engage in Interdisciplinary Star-Planet Interactions Studies

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  55. Science for all: The case for Citizen Science in all NASA missions

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  56. Investigation of the drivers and atmospheric impacts of energetic electron precipitation

    Article • July 2023, American Astronomical Society

    Dr Alexa J Halford

  57. Raising awareness on mental health in the heliophysics community

    Article • Frontiers in Physics, July 2023, Frontiers

    Dr Alexa J Halford

  58. Observation of an Electron Microburst With an Inverse Time-of-Flight Energy Dispersion

    Article • June 2023, Wiley

    Dr Alexa J Halford

  59. Earth’s magnetosphere dynamics during “forced breathing” due to solar wind periodic density structures

    Article • May 2023, Copernicus GmbH

    Dr Alexa J Halford

  60. Equitable Letters for Space Physics

    Article • May 2023, Copernicus GmbH

    Dr Alexa J Halford

  61. Magnetospheric Auroral Asymmetry eXplorer: observing the aurora to uncover how energy flows in space

    Article • May 2023, Copernicus GmbH

    Dr Alexa J Halford

  62. Martian Ionospheric Magnetic Fluctuations

    Article • May 2023, Copernicus GmbH

    Dr Alexa J Halford

  63. Summary of Actions for a More Diverse Space Physics Research Community

    Article • May 2023, Copernicus GmbH

    Dr Alexa J Halford

  64. What if… we could observe the aurora in both hemispheres.

    Article • May 2023, Copernicus GmbH

    Dr Alexa J Halford

  65. Persistent pitch angle anisotropies of relativistic electrons in the outer radiation belts

    Article • April 2023, Wiley

    Dr Alexa J Halford

  66. Simultaneous Precipitation of Sub-Relativistic Electron Microburst and Pulsating Aurora Electrons

    Article • April 2023, Wiley

    Dr Alexa J Halford

  67. The Effect of Compression Induced Chorus Waves on 10–100 s eV Electron Precipitation

    Article • Geophysical Research Letters, April 2023, American Geophysical Union (AGU)

    Dr Alexa J Halford

  68. Investigation of the drivers and atmospheric impacts of energetic electron precipitation

    Article • Frontiers in Astronomy and Space Sciences, March 2023, Frontiers

    Dr Alexa J Halford

  69. Using Application Usability Levels to support tracking the health of Heliophysics

    Article • Frontiers in Astronomy and Space Sciences, March 2023, Frontiers

    Dr Alexa J Halford

  70. Improved space weather observations and modeling for aviation radiation

    Article • Frontiers in Astronomy and Space Sciences, March 2023, Frontiers

    Dr Alexa J Halford

  71. Cultivating a culture of inclusivity in heliophysics

    Article • Frontiers in Physics, February 2023, Frontiers

    Chuanfei Dong, Dr Alexa J Halford

  72. Star-exoplanet interactions: A growing interdisciplinary field in heliophysics

    Article • Frontiers in Astronomy and Space Sciences, February 2023, Frontiers

    Chuanfei Dong, Dr Alexa J Halford

  73. Tips for writing a good recommendation letter

    Article • Frontiers in Astronomy and Space Sciences, January 2023, Frontiers

    Dr Alexa J Halford

  74. A system science perspective of the drivers of equatorial plasma bubbles

    Article • Frontiers in Astronomy and Space Sciences, January 2023, Frontiers

    Dr Alexa J Halford

  75. Expanding the deep space network to support the heliophysics system observatory

    Article • Frontiers in Astronomy and Space Sciences, January 2023, Frontiers

    Dr Alexa J Halford

  76. Supporting responsible machine learning in heliophysics

    Article • Frontiers in Astronomy and Space Sciences, December 2022, Frontiers

    Dr Alexa J Halford

  77. Thoughts from a past AGU SPA fellows committee

    Article • Frontiers in Astronomy and Space Sciences, December 2022, Frontiers

    Dr Alexa J Halford

  78. Data needs to be a priority

    Article • Frontiers in Physics, December 2022, Frontiers

    Dr Alexa J Halford

  79. Recommendations on simple but transformative diversity, equity, and inclusion measures in Heliophysics over the next decade

    Article • Frontiers in Astronomy and Space Sciences, December 2022, Frontiers

    Dr Alexa J Halford

  80. sami2py—Overview and applications

    Article • Frontiers in Astronomy and Space Sciences, December 2022, Frontiers

    Dr Alexa J Halford

  81. How open data and interdisciplinary collaboration improve our understanding of space weather: A risk and resiliency perspective

    Article • Frontiers in Astronomy and Space Sciences, December 2022, Frontiers

    Chuanfei Dong, Dr Alexa J Halford

  82. Correction to: The Van Allen Probes Electric Field and Waves Instrument: Science Results, Measurements, and Access to Data

    Article • Space Science Reviews, December 2022, Springer Science + Business Media

    Dr Alexa J Halford

  83. Science of the Van Allen Probes Science Operations Centers

    Article • Space Science Reviews, November 2022, Springer Science + Business Media

    Dr Alexa J Halford

  84. Impacts of acoustic and gravity waves on the ionosphere

    Article • Frontiers in Astronomy and Space Sciences, November 2022, Frontiers

    Dr Alexa J Halford

  85. GMAG: An open-source python package for ground-based magnetometers

    Article • Frontiers in Astronomy and Space Sciences, November 2022, Frontiers

    Dr Alexa J Halford

  86. Understanding the properties, wave drivers, and impacts of electron microburst precipitation: Current understanding and critical knowledge gaps

    Article • Frontiers in Astronomy and Space Sciences, November 2022, Frontiers

    Dr Alexa J Halford

  87. AuroraX, PyAuroraX, and aurora-asi-lib: A user-friendly auroral all-sky imager analysis framework

    Article • Frontiers in Astronomy and Space Sciences, September 2022, Frontiers

    Dr Alexa J Halford

  88. Quantifying the Size and Duration of a Microburst‐Producing Chorus Region on 5 December 2017

    Article • Geophysical Research Letters, August 2022, American Geophysical Union (AGU)

    Dr Alexa J Halford

  89. Proton aurora and relativistic electron microbursts scattered by electromagnetic ion cyclotron waves

    Article • Frontiers in Astronomy and Space Sciences, August 2022, Frontiers

    Dr Alexa J Halford

  90. Drift Phase Structure Implications for Radiation Belt Transport

    Article • Journal of Geophysical Research Space Physics, August 2022, American Geophysical Union (AGU)

    Dr Alexa J Halford

  91. Quantifying the size and duration of a microburst-producing chorus region on 5 December 2017

    Article • June 2022, Wiley

    Dr Alexa J Halford

  92. The Effect of Compression Induced Chorus Waves on 10s to 100s eV Electron Precipitation

    Article • May 2022, Wiley

    Dr Alexa J Halford

  93. Drift Phase Structure Implications for Radiation Belt Transport

    Article • February 2022, Wiley

    Dr Alexa J Halford

  94. A Strong Correlation Between Relativistic Electron Microbursts and Patchy Aurora

    Article • Geophysical Research Letters, September 2021, American Geophysical Union (AGU)

    Dr Alexa J Halford

  95. A Strong Correlation Between Relativistic Electron Microbursts and Patchy Aurora

    Article • July 2021, Wiley

    Dr Alexa J Halford

  96. On the Unexpected Correlation Between Relativistic Electron Microbursts and Patchy Pulsating Aurora

    Article • June 2021, Wiley

    Dr Alexa J Halford

  97. Driving of Outer Belt Electron Loss by Solar Wind Dynamic Pressure Structures: Analysis of Balloon and Satellite Data

    Article • Journal of Geophysical Research Space Physics, December 2020, American Geophysical Union (AGU)

    Dr Alexa J Halford

  98. Statistical Properties of Electron Curtain Precipitation Estimated With AeroCube‐6

    Article • Journal of Geophysical Research Space Physics, December 2020, American Geophysical Union (AGU)

    Dr Alexa J Halford

  99. Tiny flying box: A study of upper sky things very close and very far away from each other.

    Article • November 2020, Wiley

    Dr Alexa J Halford

  100. Statistical Properties of Electron Curtain Precipitation Estimated with AeroCube-6

    Article • July 2020, Wiley

    Dr Alexa J Halford

  101. Association between EMIC wave occurrence and enhanced convection periods during ion injections

    Article • Geophysical Research Letters, January 2020, American Geophysical Union (AGU)

    Dr Alexa J Halford

  102. Developing the LDi and LCi Geomagnetic Indices, an Example of Application of the AULs Framework

    Article • Space Weather, January 2020, American Geophysical Union (AGU)

    Dr Alexa J Halford

  103. Ultralow frequency-wave induced losses

    Article • January 2020, Elsevier

    Dr Alexa J Halford

  104. The petitSat mission – Science goals and instrumentation

    Article • Advances in Space Research, December 2019, Elsevier

    Dr Alexa J Halford

  105. The Evolution of a Pitch‐Angle “Bite‐Out” Scattering Signature Caused by EMIC Wave Activity: A Case Study

    Article • Journal of Geophysical Research Space Physics, July 2019, American Geophysical Union (AGU)

    Dr Alexa J Halford

  106. Generation of EMIC Waves and Effects on Particle Precipitation During a Solar Wind Pressure Intensification With B z >0

    Article • Journal of Geophysical Research Space Physics, June 2019, American Geophysical Union (AGU)

    Dr Alexa J Halford

  107. On the Contribution of EMIC Waves to the Reconfiguration of the Relativistic Electron Butterfly Pitch Angle Distribution Shape on 2014 September 12—A Case Study*

    Article • The Astrophysical Journal, February 2019, American Astronomical Society

    Dr Alexa J Halford

  108. The Space Physics Environment Data Analysis System (SPEDAS)

    Article • Space Science Reviews, January 2019, Springer Science + Business Media

    Dr Alexa J Halford

  109. Application usability levels: a framework for tracking project product progress

    Article • Journal of Space Weather and Space Climate, January 2019, EDP Sciences

    Dr Adam C Kellerman, Dr Alexa J Halford, Dr Sophie A. Murray

  110. How do interplanetary shock impact angles control the size of the geoeffective magnetosphere?

    Article • Advances in Space Research, January 2019, Elsevier

    Dr Alexa J Halford

  111. Snakes on a Spaceship - An Overview of Python in Heliophysics

    Article • Journal of Geophysical Research Space Physics, November 2018, American Geophysical Union (AGU)

    Dr Adam C Kellerman, Dr Alexa J Halford

  112. Pitch Angle Scattering and Loss of Radiation Belt Electrons in Broadband Electromagnetic Waves

    Article • Geophysical Research Letters, September 2018, American Geophysical Union (AGU)

    Dr Alexa J Halford, Dr Geoffrey D Reeves

  113. NASA and University of Houston’s Approach in Engaging and Developing Undergraduate Students’ Skills Through Undergraduate Student Instrumentation Project

    Article • September 2018, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Alexa J Halford

  114. Ion Injection Triggered EMIC Waves in the Earth's Magnetosphere

    Article • Journal of Geophysical Research Space Physics, June 2018, American Geophysical Union (AGU)

    Dr Alexa J Halford, Dr Geoffrey D Reeves

  115. Geomagnetically induced currents caused by interplanetary shocks with different impact angles and speeds

    Article • Space Weather, May 2018, American Geophysical Union (AGU)

    Dr Alexa J Halford

  116. The Role of Localized Compressional Ultra-low Frequency Waves in Energetic Electron Precipitation

    Article • Journal of Geophysical Research Space Physics, March 2018, American Geophysical Union (AGU)

    Dr Alexa J Halford

  117. The Undergraduate Student Instrumentation Project: A Foray into Instrument Design, Payload Fabrication, and Project Management

    Article • September 2017, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Alexa J Halford, Michael Greer, Tri Nguyen, Edgar Bering

  118. Space physics and policy for contemporary society

    Article • Journal of Geophysical Research Space Physics, April 2017, American Geophysical Union (AGU)

    Dr Alexa J Halford

  119. Investigating energetic electron precipitation through combining ground‐based and balloon observations

    Article • Journal of Geophysical Research Space Physics, January 2017, American Geophysical Union (AGU)

    Dr Alexa J Halford

  120. EMIC waves and associated relativistic electron precipitation on 25-26 January 2013

    Article • Journal of Geophysical Research Space Physics, November 2016, American Geophysical Union (AGU)

    Dr Alexa J Halford, Dr Geoffrey D Reeves

  121. Dependence of EMIC wave parameters during quiet, geomagnetic storm, and geomagnetic storm phase times

    Article • Journal of Geophysical Research Space Physics, July 2016, American Geophysical Union (AGU)

    Dr Alexa J Halford

  122. BARREL observations of a solar energetic electron and solar energetic proton event

    Article • Journal of Geophysical Research Space Physics, May 2016, American Geophysical Union (AGU)

    Dr Alexa J Halford

  123. Interplanetary shocks and the resulting geomagnetically induced currents at the equator

    Article • Geophysical Research Letters, August 2015, American Geophysical Union (AGU)

    Dr Alexa J Halford

  124. Observations of coincident EMIC wave activity and duskside energetic electron precipitation on 18-19 January 2013

    Article • Geophysical Research Letters, July 2015, American Geophysical Union (AGU)

    Dr Alexa J Halford, Dr Geoffrey D Reeves

  125. Global-scale coherence modulation of radiation-belt electron loss from plasmaspheric hiss

    Article • Nature, June 2015, Nature

    Dr Alexa J Halford

  126. A summary of the BARREL campaigns: Technique for studying electron precipitation

    Article • Journal of Geophysical Research Space Physics, June 2015, American Geophysical Union (AGU)

    Dr Alexa J Halford

  127. Simulation of ULF wave-modulated radiation belt electron precipitation during the 17 March 2013 storm

    Article • Journal of Geophysical Research Space Physics, May 2015, American Geophysical Union (AGU)

    Dr Thiago V Brito, Dr Alexa J Halford

  128. BARREL observations of an ICME-shock impact with the magnetosphere and the resultant radiation belt electron loss

    Article • Journal of Geophysical Research Space Physics, April 2015, American Geophysical Union (AGU)

    Dr Alexa J Halford

  129. EMIC waves and plasmaspheric and plume density: CRRES results

    Article • Journal of Geophysical Research Space Physics, March 2015, American Geophysical Union (AGU)

    Dr Alexa J Halford

  130. New conjunctive CubeSat and balloon measurements to quantify rapid energetic electron precipitation

    Article • Geophysical Research Letters, November 2013, American Geophysical Union (AGU)

    Dr Alexa J Halford

  131. The Balloon Array for RBSP Relativistic Electron Losses (BARREL)

    Article • Space Science Reviews, March 2013, Springer Science + Business Media

    Dr Alexa J Halford

  132. EMIC wave activity during geomagnetic storm and nonstorm periods: CRRES results

    Article • Journal of Geophysical Research Atmospheres, December 2010, American Geophysical Union (AGU)

    Dr Alexa J Halford

  133. Latitudinal and seasonal variations of quasiperiodic and periodic VLF emissions in the outer magnetosphere

    Article • Journal of Geophysical Research Atmospheres, January 2004, American Geophysical Union (AGU)

    Dr Alexa J Halford