Explore: Active Regions

number and location of active regions on the solar disk at any given time is dependent on the solar cycle. Newly observed active regions on the solar disk

less confined to the equatorial regions, with coronal holes covering the polar regions. However, during the Sun's active periods, the corona is evenly distributed

Delimitation Commission amended the number of regions to fourteen. The most urbanised and economically active regions are the Khomas and Erongo region, with

empirical law for the variation of heliographic latitudes at which solar active regions form during a solar cycle. It was discovered by the English astronomer

plage regions and active regions. Quiescent prominences, or quiescent filaments, form in the weak background magnetic field far from any active regions. Unlike

are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit convection. Sunspots appear within active regions, usually

electromagnetic radiation in the Sun's atmosphere. Flares occur in active regions and are often, but not always, accompanied by coronal mass ejections

for the orientation of magnetic fields in solar active regions. It applies to simple active regions that have bipolar magnetic field configurations where

flux and expand into the lower solar atmosphere forming active regions. At the photosphere, active region magnetic flux is often distributed in a dipole

listing active separatist movements by continent: List of active separatist movements in Africa List of active separatist movements in Asia List of active separatist