Phenomenon | Property | North(South) Hem. Chir. | comment | ref |
Filament | channel |
![]() |
channel ![]() |
[Zi97] |
`` | barbs | right(left)-bearing | 'highway exit ramps;' end in minority flux | [Zi97] |
`` | X-ray arcades | ccw (cw) loop axes | axes rotate w/height | [Zi97] |
`` | field lines | as left(right)-hand screw | assumes ``flux rope'' model | - |
active region (AR) | soft x-ray loops | N(S)-shaped | ``sigmoid'' shapes are prone to erupt | - |
AR vec. mag'grams | current helicity | negative (positive) | this is
![]() ![]() |
[Zi97] |
sunspot penumbrae | fibril whorls | ccw (cw) | whorls rare: in ![]() |
[Zi97] |
magnetic clouds | twist | left(right)-handed | interplanetary, measured in-situ | [Zi97] |
[Zi97] |
1. dextral axial field
points to right when viewed from region where normal
magnetic field is positve.