Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm42d..11o&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM42D-11
Physics
2700 Magnetospheric Physics, 2724 Magnetopause, Cusp, And Boundary Layers, 2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions, 2788 Storms And Substorms
Scientific paper
Configurations and dynamics of the earth's magnetosphere are strongly affected by the solar wind and the interplanetary magnetic field (IMF). For October 21-22, 1999 extreme conditions of a strong southward component, Bz=-(20-30) nT and a long duration, 6 hours appeared in IMF, and a strong magnetic storm of Kp=9 occurred. The Dst in the geomagnetic indices became the minimum about -227 nT at 07/22. The AL became the minimum about -2000 nT at 04:31/22. In such a strong storm, it is important to investigate the magnetospheric configuration and momentum transfer because a simple extrapolation cannot be applicable. Thus we have studied the large storm event by a global 3-dimensional MHD simulation of interaction between the solar wind and the magnetosphere. As the input of simulation, we used the WIND observations of the density, velocity, plasma pressure and IMF every 1 minutes. The inner boundary near the earth is 2.5 Re and the uniform grid interval is 0.3 Re in all directions. As the simulation results, time evolution of the cross polar cap potential, the plasma pressure, Bz and Ey profile on sun-earth line were produced. The cross polar cap potential increases about 250 KV for Bz=-20 nT and has the maximum about 350 KV for Bz=-30 nT and By=31 nT. The dayside magnetopause moves inside the geosynchronous distance and the inner edge of the plasma sheet approaches near the earth at x=-3Re. The energy flux projected on the polar cap expands up to the very low latitudes of 50 degrees.
Ogino Takeshi
Park Kyungwha
Walker Ray J.
No associations
LandOfFree
MHD Simulation of the Magnetospheric Strom for October 21-22, 1999 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with MHD Simulation of the Magnetospheric Strom for October 21-22, 1999, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MHD Simulation of the Magnetospheric Strom for October 21-22, 1999 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1385769