Tracking the momentum flux of a CME and quantifying its influence on geomagnetically induced currents at Earth

摘要: [1] We investigate a coronal mass ejection (CME) propagating toward Earth on 29 March 2011. This event is specifically chosen for its predominately northward directed magnetic field, so that the influence from momentum flux onto can be isolated. We focus our study understanding how small Earth-directed segment propagates. Mass images are created white-light cameras onboard STEREO which also converted into height-time maps (mass J-maps). The tracks these J-maps correspond to sheath region between CME and associated shock front as detected by in situ measurements at L1. A time series of COR-2A instrument made along propagation direction. Qualitatively, this shows remarkable resemblance L1 density series. used inputs three-dimensional (3-D) magnetospheric space weather simulation Community Coordinated Modeling Center. These simulations display sudden compression magnetosphere large leading edge CME, predictions derivative field (dB/dt) ground. predicted dB/dt values were then compared with observations specific equatorially located ground stations showed notable similarity. Sun down presented preliminary proof concept, such future attempts may try use remote sensing create velocity simulations.