Dr Zesta is the Chief of the Geospace Physics Laboratory in the Heliophysics Division since November 2012. Before that she was a Senior Research Physicist at the Air Force Research Laboratory.
Eftyhia is an expert in Solar Wind-Magnetosphere-Ionosphere-Thermosphere coupling and integration of Space flight observations with ground instrumentation and facility observations. Her research and work experience also spans the Academic environment (Associate Researcher at UCLA, PI of the SAMBA magnetometer chain) as well as the DoD side (science PI of the “Ionospheric Effects on RF communications” program at AFRL), thus holding a unique perspective from fundamental research, to effects on human life, to transition to operational products and has worked on many intra-agency teams and research to operations missions.
EFTYHIA ZESTA
(RESEARCH AST, FIELDS AND PARTICLES)
| Email: | eftyhia.zesta@nasa.gov |
| Phone: | 301.286.6492 |
| Org Code: | 673 |
| Address: |
NASA/GSFC Mail Code 673 Greenbelt, MD 20771 |
| Employer: |
Brief Bio
Publications
Refereed
2013. "Energetic electron flux enhancements during geospace magnetic storms associated with earthward penetration of Pc 4-5 waves?." The 11th Hellenic Astronomical Conference; held 8-12 September 2013 in Athens Greece 16-16 16-16 [Journal Article/Letter]
2013. "An extraordinary ULF wave episode during the 2003 Halloween superstorm revealed by wavelet transforms of multipoint observations." The 11th Hellenic Astronomical Conference; held 8-12 September 2013 in Athens Greece 5-5 5-5 [Journal Article/Letter]
2013. "The dynamics of the plasmasphere boundary layer as determined by ground magnetometers, satellite observations, and modeling." AGU Fall Meeting Abstracts 2313- [Journal Article/Letter]
2013. "Observed and modeled response of the dayside/nightside reconnection rates to a solar wind dynamic pressure front." AGU Fall Meeting Abstracts 2240- [Journal Article/Letter]
2013. "The relative importance of dayside and nightside reconnection on the ionospheric convection system during sudden enhancements of solar wind dynamic pressure: OpenGGCM-CTIM results." AGU Fall Meeting Abstracts 2239- [Journal Article/Letter]
2013. "Earthward penetration of Pc 4-5 waves and radiation belt electron enhancements during geospace magnetic storms." AGU Fall Meeting Abstracts A2125- [Journal Article/Letter]
2013. "Algorithms for Low-Cost High Accuracy Geomagnetic Measurements in LEO." AGU Fall Meeting Abstracts 7- [Journal Article/Letter]
2013. "High-latitude Thermosphere Response to Solar Wind Dynamic Pressure Enhancements." AGU Fall Meeting Abstracts A1968- [Journal Article/Letter]
2013. "Observations of ULF wave related equatorial electrojet and density fluctuations." Journal of Atmospheric and Solar-Terrestrial Physics 103 157-168 [10.1016/j.jastp.2013.03.015] [Journal Article/Letter]
2013. "Variations of ULF wave power throughout the Halloween 2003 superstorm." The 11th Hellenic Astronomical Conference; held 8-12 September 2013 in Athens Greece; Online at [Journal Article/Letter]
2013. "Data Assimilation Results from PLASMON." AGU Fall Meeting Abstracts 2316- [Journal Article/Letter]
2012. "Longitudinal differences of ionospheric vertical density distribution and equatorial electrodynamics." Journal of Geophysical Research (Space Physics) 117 [7312-10.1029/2011JA017454] [Journal Article/Letter]
2012. "A wavelet spectral analysis tool for multipoint space and ground-based observations of ULF wave activity." 10th Hellenic Astronomical Conference 9-9 [Journal Article/Letter]
2012. "Auroral Signatures of the Dynamic Plasma Sheet, in Auroral Signatures of the Dynamic Plasma Sheet." AGU Monograph, "Auroral Phenomenology and Magnetospheric Processes: Earth And Other Planets" [10.1029/2012GM001231] [Journal Article/Letter]
2011. "Comparison of storm time equatorial ionospheric electrodynamics in the African and American sectors." Journal of Atmospheric and Solar-Terrestrial Physics 73 156-163 [10.1016/j.jastp.2010.08.008] [Journal Article/Letter]
2011. "Two-dimensional Ionospheric Flow Pattern Associated with Auroral Streamers." AGU Fall Meeting Abstracts A2122- [Journal Article/Letter]
2011. "Field Line Resonance Measurements in the Inner Magnetosphere During Large Storms: Implications for Convection and Depletion." AGU Fall Meeting Abstracts 1977- [Journal Article/Letter]
2011. "Field Line Resonance conjugate studies in the dayside inner magnetosphere using SAMBA antarctic magnetometers and THEMIS mission probes." AGU Fall Meeting Abstracts 1975- [Journal Article/Letter]
2011. "Remote sensing of the plasmasphere mass density using ground magnetometers and the FLIP model." AGU Fall Meeting Abstracts 6- [Journal Article/Letter]
2011. "Observations of ULF wave related equatorial electrojet and density fluctuations." AGU Fall Meeting Abstracts 6- [Journal Article/Letter]
2011. "Statistical study of the effect of solar wind dynamic pressure fronts on the dayside and nightside ionospheric convection." Journal of Geophysical Research (Space Physics) 116 [10233-10.1029/2011JA016582] [Journal Article/Letter]
2011. "Statistical comparison of the ionospheric energy deposition before and after sudden enhancements in solar wind dynamic pressure using AMIE output." AGU Fall Meeting Abstracts A1997- [Journal Article/Letter]
2010. "Effect of solar wind dynamic pressure enhancements on dayside and nightside ionospheric convection and the polar cap boundary location." AGU Fall Meeting Abstracts 7- [Journal Article/Letter]
2010. "Modeling Field Line Resonances in the Inner Plasmasphere with the Field Line Interhemispheric Plasma Model." AGU Fall Meeting Abstracts 1729- [Journal Article/Letter]
2010. "On the application of theWigner-Ville distribution to the identification and analysis of Pc 5 waves events." European Planetary Science Congress 2010 923- [Journal Article/Letter]
2010. "A Satellite Mission Concept to Study Thermosphere-Ionosphere Coupling." AGU Fall Meeting Abstracts A8- [Journal Article/Letter]
2010. "Remote sensing of the plasmasphere mass density using conjugate magnetometer chains SAMBA, MEASURE, and McMAC." AGU Fall Meeting Abstracts A4- [Journal Article/Letter]
2010. "The Longitudinal Variation of Equatorial Electrodynamics Observations." AGU Fall Meeting Abstracts 9- [Journal Article/Letter]
2010. "The South American Meridional B-field Array (SAMBA) and Pc4-5 Wave Studies." AGU Fall Meeting Abstracts 1752- [Journal Article/Letter]
2010. "Ionospheric Flow Shear Associated with Poleward Boundary Intensification (PBI)." AGU Fall Meeting Abstracts A1832- [Journal Article/Letter]
2010. "Estimation of radial gradients of phase space density from POLAR observations during a quiet period prior to a sudden solar wind dynamic pressure enhancement." Journal of Geophysical Research (Space Physics) 115 [12249-10.1029/2010JA015722] [Journal Article/Letter]
2009. "The South American Meridional B-field Array (SAMBA) and opportunities for inter- hemispheric studies." AGU Spring Meeting Abstracts A5- [Journal Article/Letter]
2009. "A statistical study of the differences between Northern and Southern Hemisphere conjugate AE calculations." AGU Spring Meeting Abstracts A6- [Journal Article/Letter]
2009. "Conjugate Studies of Pc3-5 ULF Waves Using SAMBA, MEASURE, and McMAC Magnetometer Chains." AGU Fall Meeting Abstracts A1512- [Journal Article/Letter]
2009. "Equatorial ionospheric electrodynamics observations in the African and American longitudinal sectors." AGU Fall Meeting Abstracts A6- [Journal Article/Letter]
2009. "Characteristics of ULF waves observed at low latitudes and their influence on storm-time radiation belt electron enhancements." European Planetary Science Congress 2009 592- [Journal Article/Letter]
2009. "Tail and Ionospheric Signatures of Tail Fast Flows Associated with PBIs and with Substorms." AGU Spring Meeting Abstracts 3- [Journal Article/Letter]
2009. "Specifying the Earth's Plasmasphere With Data Assimilation of Ground-Based Field-Line Resonance Measurements." AGU Fall Meeting Abstracts 5- [Journal Article/Letter]
2009. "Comparison of dayside and nightside ionospheric convection changes following sudden enhancements in solar wind dynamic pressure." AGU Fall Meeting Abstracts 1540- [Journal Article/Letter]
2009. "Temporary and Spatial Variations of Ionospheric Flow Signatures Associated with PBIs and Substorms." AGU Fall Meeting Abstracts 1725- [Journal Article/Letter]
2009. "Auroral poleward boundary intensifications, their associated tail dynamics and ionospheric flows (Invited)." AGU Fall Meeting Abstracts 1- [Journal Article/Letter]
2008. "Nightside flow enhancement associated with solar wind dynamic pressure driven reconnection." Journal of Geophysical Research (Space Physics) 113 [12211-10.1029/2008JA013489] [Journal Article/Letter]
2008. "Statistical Study of the Response of the Transpolar Potential to Solar Wind Dynamic Pressure Fronts as a Function of their Pressure Change and Accompanying IMF." AGU Fall Meeting Abstracts A1665- [Journal Article/Letter]
2008. "The coupling of tail fast flows to ionospheric flow signatures and their relationship to substorm onset." AGU Fall Meeting Abstracts 1720- [Journal Article/Letter]
2008. "Equatorial Electrojet Observations in the African Continent." AGU Fall Meeting Abstracts A1491- [Journal Article/Letter]
2008. "Temporal evolution of the transpolar potential after a sharp enhancement in solar wind dynamic pressure." Geophysical Research Letters 35 [2101-10.1029/2007GL031766] [Journal Article/Letter]
2007. "Dayside reconnection enhancement resulting from a solar wind dynamic pressure increase." Journal of Geophysical Research (Space Physics) 112 [6201-10.1029/2006JA012141] [Journal Article/Letter]
2007. "Comparison of dayside and nightside reconnection changes resulting from a sudden enhancement in solar wind dynamic pressure." AGU Fall Meeting Abstracts 7- [Journal Article/Letter]
2007. "Effect of solar wind dynamic pressure enhancements on convection and the aurora under different IMF conditions: modeling and observations." AGU Fall Meeting Abstracts 1318- [Journal Article/Letter]
2007. "Magnetospheric Current Response to Solar Wind Dynamic Pressure Enhancements during Strong Magnetic Storms." AGU Fall Meeting Abstracts A1074- [Journal Article/Letter]
2007. "Comparison of Fourier and wavelet techniques in the determination of geomagnetic field line resonances." Journal of Geophysical Research (Space Physics) 112 [8205-10.1029/2006JA011922] [Journal Article/Letter]
2006. "A Satellite-Ground Study of Low-Latitude Pi2 Pulsations." AGU Fall Meeting Abstracts 1467- [Journal Article/Letter]
2006. "Statistical Study of the Effect of Long-duration, Solar Wind Dynamic Pressure Step Increases on the Transpolar Potential." AGU Fall Meeting Abstracts A292- [Journal Article/Letter]
2006. "Effect of solar wind dynamic pressure changes on convection and the aurora: modeling and observations." AGU Fall Meeting Abstracts 2- [Journal Article/Letter]
2006. "Statistical study of effect of solar wind dynamic pressure enhancements on dawn-to-dusk ring current asymmetry." Journal of Geophysical Research (Space Physics) 111 [10216-10.1029/2005JA011532] [Journal Article/Letter]
2006. "Auroral poleward boundary intensifications (PBIs): Their two-dimensional structure and associated dynamics in the plasma sheet." Journal of Geophysical Research (Space Physics) 111 [5201-10.1029/2004JA010640] [Journal Article/Letter]
2006. "On the Relation of Bursty Bulk Flows to Poleward Boundary Intensifications: Global Simulation of the January 3, 2001 Event." AGU Fall Meeting Abstracts 1- [Journal Article/Letter]
2006. "Modeling the relative contribution of magnetospheric currents to the stormtime ground dawn-dusk asymmetric H perturbation during solar wind dynamic pressure enhancements." AGU Fall Meeting Abstracts A1443- [Journal Article/Letter]
2005. "Model results of the effect of solar wind dynamic pressure enhancements on the auroral size and strength and comparison with observations." AGU Fall Meeting Abstracts A6- [Journal Article/Letter]
2005. "Temporal Evolution of the Cross-polar-cap Potential After Sharp Enhancements in Solar Wind Dynamic Pressure." AGU Fall Meeting Abstracts A4- [Journal Article/Letter]
2005. "Effect of solar wind pressure enhancements on storm time ring current asymmetry." Journal of Geophysical Research (Space Physics) 110 [10205-10.1029/2005JA011019] [Journal Article/Letter]
2005. "Enhanced solar wind geoeffectiveness after a sudden increase in dynamic pressure during southward IMF orientation." Journal of Geophysical Research (Space Physics) 110 [5214-10.1029/2004JA010704] [Journal Article/Letter]
2004. "Conjugate Observations of Field-Line Resonances in the Inner Magnetosphere from the MEASURE and SAMBA Magnetometer Chains." AGU Fall Meeting Abstracts A455- [Journal Article/Letter]
2004. "Magnetospheric reconnection driven by solar wind pressure fronts." Annales Geophysicae 22 1367-1378 [10.5194/angeo-22-1367-2004] [Journal Article/Letter]
2004. "Super Dual Auroral Radar Network Observations of Ionospheric Convection Enhancements Driven by Solar Wind Dynamic Pressure Fronts." AGU Fall Meeting Abstracts 4- [Journal Article/Letter]
2004. "Evaluation of the Hill-Siscoe transpolar potential saturation model during a solar wind dynamic pressure pulse." Geophysical Research Letters 31 [23802-10.1029/2004GL021252] [Journal Article/Letter]
2003. "Association of north-south Poleward Boundary Intensificatio (PBI) orientation with plasma sheet flow direction and the IMF." AGU Fall Meeting Abstracts 605- [Journal Article/Letter]
2003. "Increased geoeffectiveness of high solar wind dynamic pressure fronts under southward IMF orientation." AGU Fall Meeting Abstracts 5- [Journal Article/Letter]
2003. "Effect of Solar Wind Pressure Enhancement on Ring Current Asymmetry During Strong Storms." AGU Fall Meeting Abstracts 1150- [Journal Article/Letter]
2003. "Effect of solar wind pressure pulses on the size and strength of the auroral oval." Journal of Geophysical Research (Space Physics) 108 [8012-10.1029/2002JA009373] [Journal Article/Letter]
2002. "Signatures of traveling convection vortices in ground magnetograms under the equatorial electrojet." Journal of Geophysical Research (Space Physics) 107 [1087-10.1029/2001JA000153] [Journal Article/Letter]
2002. "Two-dimensional structure of auroral poleward boundary intensifications." Journal of Geophysical Research (Space Physics) 107 [1350-10.1029/2001JA000260] [Journal Article/Letter]
2002. "Auroral poleward boundary intensifications and tail bursty flows: A manifestation of a large-scale ULF oscillation?." Journal of Geophysical Research (Space Physics) 107 [1352-10.1029/2001JA000242] [Journal Article/Letter]
2002. "Reply to comment by T. Kikuchi and T. Araki on “Propagation of the preliminary reverse impulse of sudden commencements to low latitudes”." J. Geophys. Res. 107 (A12): [10.1029/2002JA009369] [Journal Article/Letter]
2002. "A statistical study of traveling convection vortices using the Magnetometer Array for Cusp and Cleft Studies." Journal of Geophysical Research (Space Physics) 107 [1317-10.1029/1999JA000386] [Journal Article/Letter]
2002. "Dependence of the Response of Auroral Particle Precipitation to Solar Wind Pressure Fronts on the Preexisting IMF Orientation." 34th COSPAR Scientific Assembly 34 [Journal Article/Letter]
2002. "Auroral Poleward Boundary Intensifications: their two-dimensional structure and the associated dynamics in the Plasma Sheet." AGU Fall Meeting Abstracts 7- [Journal Article/Letter]
2002. "The response of ionospheric convection to solar wind pressure fronts under different IMF orientations." AGU Fall Meeting Abstracts 444- [Journal Article/Letter]
2002. "Auroral Poleward Boundary Intensifications and Modes of Energy Transport in the Plasma Sheet." 34th COSPAR Scientific Assembly 34 [Journal Article/Letter]
2002. "A Detailed Study of the Solar Wind Triggers of two Traveling Convection Vortex (TCV) Events that Occurred on July 25, 1997." 34th COSPAR Scientific Assembly 34 - [Journal Article/Letter]
2002. "Conjugate observations of traveling convection vortices: The field-aligned current system." Journal of Geophysical Research (Space Physics) 107 [1306-10.1029/2002JA009456] [Journal Article/Letter]
2002. "Relation of substorm breakup arc to other growth-phase auroral arcs." Journal of Geophysical Research (Space Physics) 107 [Journal Article/Letter]
2001. "Relation of Substorm Breakup Arc to other Growth-Phase Auroral Arcs." AGU Fall Meeting Abstracts 9- [Journal Article/Letter]
2001. "Propagation of the preliminary reverse impulse of sudden commencements to low latitudes." Journal of Geophysical Research 106 18857-18864 [10.1029/2001JA900071] [Journal Article/Letter]
2001. "Timing of substorm signatures during the November 24, 1996, Geospace Environment Modeling event." Journal of Geophysical Research 106 349-360 [10.1029/1999JA000601] [Journal Article/Letter]
2001. "Auroral Poleward Boundary Intensifications and Modes of Energy Transport in the Plasma Sheet." AGU Fall Meeting Abstracts 9 [Journal Article/Letter]
2001. "The Effect of Solar Wind Pressure Pulses on the Size and Strength of the Auroral Oval." AGU Fall Meeting Abstracts 4- [Journal Article/Letter]
2000. "Structured Currents Associated With Tail Bursty Flows During Turbulent Plasma Sheet Conditions." Washington DC American Geophysical Union Geophysical Monograph Series 118 267- [Journal Article/Letter]
2000. "The Effect of the January 10, 1997, Pressure Pulse on the Magnetosphere-Ionosphere Current System." Washington DC American Geophysical Union Geophysical Monograph Series 118 217- [Journal Article/Letter]
2000. "Auroral disturbances during the January 10, 1997 magnetic storm." Geophysical Research Letters 27 3237-3240 [10.1029/1999GL000014] [Journal Article/Letter]
1999. "The November 9, 1993, traveling convection vortex event: A case study." Journal of Geophysical Research 104 28041-28058 [10.1029/1999JA900306] [Journal Article/Letter]
1997. "Global perspective of ionospheric traveling convection vortices: Case studies of two Geospace Environmental Modeling events." Journal of Geophysical Research 102 11597-11610 [10.1029/97JA00324] [Journal Article/Letter]
1995. "Ground Observations of Transient Cusp Phenomena: Initial Results From MACCS." Washington DC American Geophysical Union Geophysical Monograph Series 90 427- [Journal Article/Letter]
1995. "Magnetometer array for cusp and cleft studies observations of the spatial extent of broadband ULF magnetic pulsations at cusp/cleft latitudes." Journal of Geophysical Research 100 19371-19386 [10.1029/95JA00768] [Journal Article/Letter]