Several coronal mass ejections have been observed with a superb example occurring on 2011 March 19 when a large plasma sheet
was seen extending over the western limb linked by a slender stem.
The image shows the plasma sheet and magnetotail in profile.
However, a closer look at the various images produced by multiple IBEX orbits revealed what appeared to be a piece of the plasma sheet being bitten off and ejected down the tail.
This magnetic disconnection phenomenon-a dynamic event where the magnetic fields "reconnect" across the plasma sheet, producing what is known as a plasmoid, is one explanation for what could be occurring in the series of images, which has never before directly seen before.
Similarly, the solar wind at times increases the pressure around the magnetosphere, resulting in a portion of the plasma sheet being pinched away from the rest of the plasma sheet and forced down the magnetotail," said McComas.
This is the time when we can expect the moon to cross low-density plasma in the tail lobes and high-temperature plasma in the plasma sheet of the magnetotail (Lichtenstein & Schubert, 1976).
The results for Hypothesis G indicating that retroPK performance might be higher when the moon is moving deeply through the plasma sheet of the magnetotail than when moving through the outer rings of the plasma sheet were significant in the regression analysis of the full moon interval and in the difference of full moon data versus non-full moon data.
The transfer function amplitude for the moon in the plasma sheet during the full moon interval is approximately 1.
The scientists also confirmed that when the magnetic field carried by the plasma sheet points opposite to the direction of Earth's magnetic field, material within the sheet can penetrate Earth's protective magnetic bubble.
Previous measurements of the plasma sheet and the magnetic field it carries were confined to small regions that couldn't readily be stitched together into a global picture of the forces involved in triggering geomagnetic storms, says David J.
The 5 hour variation appears to be linked to the rotational period of Jupiter's magnetic field and the movement of Ganymede through the tilted plasma sheet
that surrounds the planet," said Dr.
It is fed by low-energy charged particles that are lifted into space over Earth's poles, carried behind the Earth in its magnetic tail, but then jerked around 180 degrees by a kink in the magnetic fields that boosts the particles back toward Earth in a region called the plasma sheet