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3 edition of Ring current development during storm main phase found in the catalog.

Ring current development during storm main phase

Ring current development during storm main phase

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Published by National Aeronautics and Space Administration in [Washington, D.C .
Written in English

    Subjects:
  • Magnetic storms.,
  • Magnetospheric currents.

  • Edition Notes

    StatementMei-Ching Fok, Thomas E. Moore, Marian E. Greenspan.
    Series[NASA contractor report] -- NASA-CR-204596., NASA contractor report -- NASA CR-204596.
    ContributionsMoore, Thomas E., Greenspan, Marian E., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Paginationp. 15.311-15.322
    Number of Pages322
    ID Numbers
    Open LibraryOL15502665M

    design development phase The first phase in a preparing a Storm Water Pollution Prevention Plan for a construction project is to define the characteristics of the site and the . Ring current ions and relativistic electrons simultaneously measured on board MOLNIYA-1 are analyzed in comparison with the ground-based magnetometer data for the period of a strong magnetic storm (|D st|max ≈ nT). Injection of > keV electrons into the slot region (L≈3) near equatorial plane is occurred on time scale ≈1 hour, when, during the magnetic storm maximum, the extreme low Author: L.V. Tverskaya.

    however, could be important during the main as well as the recovery phase. Role of electromagnetic ion cyclotron modes (Horne and Thorne, ; Fok et al., ) and Quasi-electrostatic modes in ring current decay has been studied in the literature (Lakhina and Singh, ; Singh et al., ; ).File Size: KB. An improved version of the ring current-atmosphere interactions kinetic model (RAM) is presented in this thesis. The recent stormtime empirical model T04s and the IGRF model are used to represent the Earth's external and internal magnetic fields respectively. Particle drifts, losses due to charge exchange with geocoronal hydrogen and atmospheric losses are included in the model as they are Author: Alexander Emilov Vapirev.

    removed from the site, and sediment collected during the construction phase is removed (dredged) from permanent storm water control structures to restore design capacity, if necessary. Storm water runoff volume reaches post-development rates and may be less than the volume that. A geomagnetic storm (commonly referred to as a solar storm) is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave and/or cloud of magnetic field that interacts with the Earth's magnetic field.. The disturbance that drives the magnetic storm may be a solar coronal mass ejection (CME) or a co-rotating interaction region (CIR), a high-speed stream of solar wind.


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Ring current development during storm main phase Download PDF EPUB FB2

The development of the ring current ions in the inner magnetosphere during the main phase of a magnetic storm is studied. The temporal and spatial evolution of the ion phase space densities in a dipole field are calculated using a three dimensional ring current model, considering charge exchange and Coulomb losses along drift by: The development of ring current H+ during the storm main phase on May 2,is simulated with the initial and boundary conditions specified in the last section.

The development of the ring current ions in the inner magnetosphere during the main phase of a magnetic storm is studied. The temporal and spatial evolution of the ion phase space densities in a. During the main phase of geomagnetic storms, an additional magnetic field (DR) is superposed on the normal field of the earth.

The DR field is nearly uniform over the earth, and is along the direction of the dipole axis of the earth. It is ascribed to the growth of a ring current flowing in Cited by: 2.

The development of the ring current ions in the inner magnetosphere during the main phase of a magnetic storm is studied. The temporal and spatial evolution of the ion phase space densities in a dipole field are calculated using a three dimensional ring current model, considering charge exchange and Coulomb losses along drift paths.

Main Phase Magnetic Storm Ring Current These keywords were added by machine and not by the authors. This process is experimental and the keywords may be Cited by: The ring current composition of this storm, which had a complicated main phase and a minimum Dst of nT on February 9, was followed for five days from the prestorm quiet time to the early.

Recent in situ measurements by satellites passing through the ring-current region and computations with disturbed magnetosphere models show that the Dst storm is not solely a main-phase to decay-phase, growth to disintegration, of a massive current encircling the Earth.

Although a ring current certainly exists during a storm, there are many. Geomagnetic storms, the Dst ring-current myth and lognormal distributions magnetosphere models show that the Dst storm is not solely a main-phase to decay-phase, growth to disintegration, of a massive current encircling the Earth.

Although a ring current certainly exists during a storm, there are many other field contributions at the middle. We have developed an empirical model in magnetic local time (MLT) and L-shell of the ring current pressure development during the different storm phases (prestorm, main phase, early recovery, and late recovery) and for different species (H+, He+, O+, e-).

The magnetic field data of the ground stations from INTERMAGNET is used to investigate the ring current distributions along with the magnetic local time. For each event, eight stations located in the geomagnetic longitude evenly are selected to calculate the geomagnetic field component (H) which parallels to the dipole axis.

The storm events with different SYMH values show that the H component Author: X. Zhao, A. Here, the results show that the contribution of ring current electrons to the ring current energy content is much smaller than that of ring current ions (up to ~12% for the moderate storm and ~7% for the intense storm), and ring current electron energy content at the storm main phases.

The currently outstanding open issues of ring current dynamics are: – the capability or necessity of substorms in facilitating or driving the growth of the storm-time ring current; – the question of symmetry or asymmetry in the large-scale morphology of the ring current – especially during the storm main phase and early recovery phase.

during the main and early recovery phase, ions flow along open trajectories in the dusk and afternoon sectors before encountering the dayside magnetopause.

Abstract We conducted a statistical analysis of the geomagnetic field variations during the storm main phase at two low-latitude stations, separated by several hours in magnetic local time, in order to investigate the asymmetry and longitudinal extent of the storm-time ring current.

On the assumption that the anti-direction of the gradient of the H component indicates the peak location of the ring current, for intense and moderate storms, the peak of the ring current is near local dusk during the storm main and early recovery phase, which is the same as the result deduced from the global six stations.

For super storms, the Author: G. Zeng, C. Shen, Z.J. Rong, X. Li, T. Chen, Z.Q. Chen, Y.H. Ma, Y.H. During the main phase, convection may be both the source and major sink of the asymmetric ring current. During the rapid recovery phase, neutral‐wind‐induced convection may be.

moderate storm and ~7% for the intense storm), and ring current electron energy content at the storm main phases. Though the. It is observed and expected physically that the ring current is asymmetric during the main phase of a magnetic storm and becomes symmetric in the recovery phase.

We report work utilizing 1-min resolution Sym-H * and Asym-H to study the time development of these currents. Dst (Disturbance Storm Time) equivalent equatorial magnetic disturbance indices are derived from hourly scalings of low-latitude horizontal magnetic variation.

They show the effect of the globally symmetrical westward flowing high altitude equatorial ring current, which causes the "main phase" depression worldwide in the H-component field.

Storm Time Ring Current - Atmosphere Interactions: Observations and Modeling • Simulate the ring current-atmosphere interactions during the large geomagnetic storm of October 21 - 25, using data from the MPA and SOPA instruments on LANL spacecraft • Investigate the relative role of a) the convection electric field, b) radial diffusion, and c) wave-particle interactions on the dynamics.Abstract.

The paper considers a proposed source for the geomagnetic storm main phase ring current. It is shown that the flux increases of trapped ions and electrons observed by Explorer 45 at L below 4 during two large geomagnetic storms can be explained by inward radial displacement of the preexisting trapped particle : L.

R. Lyons and D. J. Williams.IMF conditions control the storm activity and an important plasma source of the ring current is in the solar wind. However, the ionospheric outflow can also affect the ring current development, especially in .