In May 2011, the NASA Goddard Space Flight Center (GSFC) awarded a Cooperative Agreement to the University of Maryland, Baltimore County, to create a science center for collaborative research in Solar-Planetary Sciences at NASA’s Goddard Space Flight Center, Greenbelt, MD. Through this arrangement, UMBC and its partners – University of Maryland College Park and American University – developed collaborative research programs in all areas of the Heliophysics sciences. This consortium between government and universities to create GPHI (Goddard Planetary Heliophysics Institute) not only provided a secure “home” for Heliophysics scientists, but also synergistically fostered new directions in research and technology.

Recent Submissions

  • Space Weather Modeling and Prediction for Intermediate Time-scales 

    Dikpati, M.; Leamon, R. J.; Anderson, J. L.; Belucz, B.; Biesecker, D.; Bothun, G.; Fan, Y.; Gilman, P. A.; Guerrero, G.; Hoeksema, J. T.; Kitiashvili, I. N.; Kosovichev, A. G.; Linkmann, M.; McIntosh, S. W.; Norton, A. A.; Rempel, M.; Tripathy, S. C.; Upton, L.; Wang, H.; Wing, S.
    “Space Weather” describes the conditions in the terrestrial system, particularly on its outer envelope, that can affect various ground- and space-borne technologies due to the impact of energetic particles and magnetic ...
  • Recreating the Horizontal Magnetic Field at Colaba during the Carrington Event with Geospace Simulations 

    Blake, Seán P.; Pulkkinen, Antti; Schuck, Peter W.; Glocer, Alex; Oliveira, Denny; Welling, Daniel; Weigel, Robert S.; Quaresima, Gary (AGU Pubication, 2021-03-14)
    An intriguing aspect of the famous 2 September 1859 geomagnetic disturbance (or ‘Carrington’ event) is the horizontal magnetic (B H ) dataset measured in Colaba, India (magnetic latitude approximately 20 degrees N). The ...
  • Observations of density cavities and associated warm ion flux enhancements in the inner magnetosphere 

    Ferradas, C. P.; Boardsen, Scott; Fok, M.‐C.; Buzulukova, N.; Reeves, G. D.; Larsen, B. A. (AGU Pubication, 2021-02-13)
    We present a statistical study of density cavities observed in the inner magnetosphere by the Van Allen Probes during four one‐month periods: February 2013, July 2013, January 2014, and June 2014. These periods were chosen ...
  • Deciphering Solar Magnetic Activity. II. The Solar Cycle Clock and the Onset of Solar Minimum Conditions 

    Leamon, Robert; McIntosh, Scott; Chapman, Sandra; Watkins, Nicholas; Chatterjee, Subhamoy; Title, Alan
    The Sun's variability is controlled by the progression and interaction of the magnetized systems that form the 22-year magnetic activity cycle (the "Hale Cycle") as they march from their origin at ∼55 degrees latitude to ...
  • Magnetic Field Line Random Walk and Solar Energetic Particle Path Lengths: Stochastic Theory and PSP/ISoIS Observation 

    Chhiber, R.; Matthaeus, W. H.; Cohen, C.M.S.; Ruffolo, D.; Sonsrettee, W.; Tooprakai, P.; Seripienlert, A.; Chuychai, P.; Usmanov, A. V.; Goldstein, M. L.; McComas, D. J.; Leske, R. A.; Christian, E. R.; Mewaldt, R. A.; Labrador, A. W.; Szalay, J. R.; Joyce, C. J.; Giacalone, J.; Schwadron, N. A.; Mitchell, D. G.; Hill, M. E.; Wiedenbeck, M. E.; McNutt, R. L. Jr; Desai, M. I.
    Context:In 2020 May-June, six solar energetic ion events were observed by the Parker Solar Probe/ISoIS instrument suite at 0.35 AU from the Sun. From standard velocity-dispersion analysis, the apparent ion path length is ...
  • Probabilistic Forecasts of Storm Sudden Commencements From Interplanetary Shocks Using Machine Learning 

    Smith, A. W.; Rae, I. J.; Forsyth, C.; Oliveira, D. M.; Freeman, M. P.; Jackson, D. R. (AGU Pubication, 2020-10-14)
    In this study we investigate the ability of several different machine learning models to provide probabilistic predictions as to whether interplanetary shocks observed upstream of the Earth at L1 will lead to immediate ...
  • Deciphering Solar Magnetic Activity: 140 Years Of The ‘Extended Solar Cycle’ – Mapping the Hale Cycle 

    McIntosh, Scott W.; Leamon, Robert J.; Egeland, Ricky; Dikpati, Mausumi; Altrock, Richard C.; Banerjee, Dipankar; Chatterjee, Subhamoy; Cliver, Edward; Srivastava, Abhishek K.; Velli, Marco
    The cyclic, enigmatic, and ubiquitous magnetism of the Sun provides the energy we need to survive and has the ability to destroy our technologically dependent civilization. Never before has understanding solar magnetism ...
  • The Extreme Space Weather Event in February/March 1941 

    Hayakawa, Hisashi; Blake, Sean P.; Bhaskar, Ankush; Hattori, Kentaro; Oliveira, Denny M.; Ebihara, Yusuke (2020-10-01)
    Given the infrequency of extreme geomagnetic storms, it is significant to note the concentration of three extreme geomagnetic storms in 1941, whose intensities ranked fourth, twelfth, and fifth within the aa index between ...
  • Concerning the interaction of a transmitted interplanetary impulse with a plasmaspheric drainage plume: First results from 3-D hybrid kinetic modeling 

    Lipatov, A.S.; Sibeck, D.G. (Elsevier, 2020-09-25)
    We present a new hybrid kinetic model to simulate the response of plasmaspheric drainage plumes to impulsive interplanetary pressure pulses. Since particle distributions attending the interplanetary pulses and in the ...
  • Intermittency and q-Gaussian Distributions in the Magnetic Field of the Very Local Interstellar Medium (VLISM) Observed by Voyager 1 and Voyager 2 

    Burlaga, L. F.; Ness, N. F.; Berdichevsky, D. B.; Jian, L. K.; Park, J.; Szabo, A. (IOP, 2020-09-16)
    Voyager 1 (V1) observed q-Gaussian distributions of 1 hr increments of the components the magnetic field ${\boldsymbol{B}}$ throughout the very local interstellar medium (VLISM) on scales on the order of 1 year, from 2013 ...
  • Shear-Driven Transition to Isotropically Turbulent Solar Wind Outside the Alfv´en Critical Zone 

    Ruffolo, D.; Matthaeus, W. H.; Chhiber, R.; Usmanov, A. V.; Yang, Y.; Bandyopadhyay, R.; Parashar, T. N.; Goldstein, M. L.; DeForest, C. E.; Wan, M.; Chasapis, A.; Maruca, B. A.; Velli, M.; Kasper, J. C. (2020-09-15)
    Motivated by prior remote observations of a transition from striated solar coronal structures to more isotropic ``flocculated'' fluctuations, we propose that the dynamics of the inner solar wind just outside the Alfvén ...
  • The Streamer Blowout Origin of a Flux Rope and Energetic Particle Event Observed by Parker Solar Probe at 0.5 au 

    Lario, D.; Balmaceda, L.; Alzate, N.; Mays, M. L.; Richardson, I. G.; Allen, R. C.; Florido-Llinas, M.; Nieves-Chinchilla, T.; Koval, A.; Lugaz, N.; Jian, L. K.; Arge, C. N.; Macneice, P. J.; Odstrcil, D.; Morgan, H.; Szabo, A.; Desai, M. I.; Whittlesey, P. L.; Stevens, M. L.; Ho, G. C.; Luhmann, J. G. (The American Astronomical Society, 2020-07-10)
    The distribution of spacecraft in the inner heliosphere during 2019 March enabled comprehensive observations of an interplanetary coronal mass ejection (ICME) that encountered Parker Solar Probe (PSP) at 0.547 au from the ...
  • Assessment of observational evidence for direct convective hydration of the lower stratosphere 

    Jensen, E. J.; Pan, Laura L.; Honomichl, Shawn; Diskin, Glenn S.; Krämer, Martina; Spelten, Nicole; Günther, Gebhard; Hurst, Dale F.; Fujiwara, Masatomo; Vömel, Holger; Selkirk, Henry B.; Suzuki, Junko; Schwartz, Michael J.; Smith, Jessica B. (AGU Pubication, 2020-06-23)
    In situ and remote‐sensing observations of water vapor are analyzed to assess the evidence for direct convective hydration of the lower stratosphere. We have examined several hundred balloon‐borne and airborne in situ ...
  • Voyager 1 and 2 Observations of a Change in the Nature of Magnetic Fluctuations in the VLISM with Increasing Distance from the Heliopause 

    Burlaga, L. F.; Ness, N. F.; Berdichevsky, D. B.; Jian, L. K.; Park, J.; Szabo, A. (IOP, 2020-06-25)
    Voyager 2 (V2) crossed the heliopause at 119.0 au on 2018 day 309, after which it observed compressive (longitudinal) magnetic field fluctuations along the average magnetic field direction in the very local interstellar ...
  • Model Fitting of Wind Magnetic Clouds for the Period 2004 – 2006 

    Lepping, R. P.; Wu, C.-C.; Berdichevsky, D. B.; Szabo, A. (Springer Nature, 2020-06-22)
    We give the results of parameter fitting of the magnetic clouds (MCs) observed by the Wind spacecraft for the three year period – 2004 to the end of 2006 (the “Present period”) using the force-free MC model of Lepping, ...
  • An analysis of the Trouvelot’s Auroral Drawing on 1/2 March 1872: Plausible Evidence for Recurrent Geomagnetic Storms 

    Bhaskar, Ankush; Hayakawa, Hisashi; Oliveira, Denny M.; Blake, Sean; Silverman, Sam M.; Ebihara, Yusuke (AGU Pubication, 2020-06-22)
    This work examines Trouvelot’s observations and drawing of an auroral display during the night of 1 March 1872. It is known that the auroral oval moves equatorward to mid‐ and even low‐latitudes during large geomagnetic ...
  • Using radio triangulation to understand the origin of two subsequent type II radio bursts 

    Jebaraj, I. C.; Magdalenic, J.; Podladchikova, T.; Scolini, C.; Pomoell, J.; Veronig, A. M.; Dissauer, K.; Krupar, V.; Kilpua, E. K. J.; Poedts, S. (EDP sciences, 2020-05-07)
    Context. Eruptive events such as coronal mass ejections (CMEs) and flares accelerate particles and generate shock waves which can arrive at Earth and can disturb the magnetosphere. Understanding the association between ...
  • A possible case of sporadic aurora observed at Rio de Janeiro 

    Oliveira, Denny M.; Hayakawa, Hisashi; Bhaskar, Ankush; Zesta, Eftyhia; Vichare, Geeta (Springer Open, 2020-06-06)
    Being footprints of major magnetic storms and hence major solar eruptions, mid- to low-latitude aurorae have been one of the pathways to understand solar–terrestrial environments. However, it has been reported that aurorae ...
  • A Merged Search-Coil and Fluxgate Magnetometer Data Product for Parker Solar Probe FIELDS 

    Bowen, Trevor A.; Bale, Stuart D.; Bonnell, John W.; Wit, Thierry Dudok de; Goetz, Keith; Goodrich, Katherine; Gruesbeck, Jacob; Harvey, Peter R.; Jannet, Guillaume; Koval, Andriy; MacDowall, Robert J.; Malaspina, David M.; Pulupa, Marc; Revillet, Claire; Sheppard, David; Szabo, Adam (2020-01-19)
    NASA’s Parker Solar Probe (PSP) mission is currently investigating the local plasma environment of the inner-heliosphere (<0.25R ) using both in-situ and remote sensing instrumentation. Connecting signatures of microphysical ...
  • Highly structured slow solar wind emerging from an equatorial coronal hole 

    Bale, S. D.; Badman, S. T.; Bonnell, J. W.; Bowen, T. A.; Burgess, D.; Case, A. W.; Cattell, C. A.; Chandran, B. D. G.; Chaston, C. C.; Chen, C. H. K.; Drake, J. F.; Dudok de Wit, T.; Eastwood, J. P.; Ergun, R. E.; Farrell, W. M.; Fong, C.; Goetz, K.; Goldstein, M.; Goodrich, K. A.; Harvey, P. R.; Horbury, T. S.; Howes, G. G.; Kasper, J. C.; Kellogg, P. J.; Klimchuk, J. A.; Korreck, K. E.; Krasnoselskikh, V. V.; Krucker, S.; Laker, R.; Larson, D. E.; MacDowall, R. J.; Maksimovic, M.; Malaspina, D. M.; Martinez-Oliveros, J.; McComas, D. J.; Meyer-Vernet, N.; Moncuquet, M.; Mozer, F. S.; Phan, T. D.; Pulupa, M.; Raouafi, N. E.; Salem, C.; Stansby, D.; Stevens, M.; Szabo, A.; Velli, M.; Woolley, T.; Wygant, J. R. (Nature, 2019-12-04)
    During the solar minimum, when the Sun is at its least active, the solar wind is observed at high latitudes as a predominantly fast (more than 500 kilometres per second), highly Alfvénic rarefied stream of plasma originating ...

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