A complex of activity is an area where, repeatedly, the appearance of groups of spots is observed over a period of several months, sometimes more than a year. The groups that appear in a complex are related by their continuity and proximity, which makes that area have a distinctive character with respect to the surrounding activity. Usually they emerge quickly (in one or two months they are already formed) and have a slow decline. Sometimes its activity becomes very dense, showing 5 or 6 groups simultaneously. Its extension can reach more than 30º in length.

In white light the best tracer of an activity complex is its associated facular region, which disappears one or two rotations after its last group has disappeared. The table includes those regions that have produced significant and continuous activity for more than three rotations. Likewise, a complex will be considered extinguished if it does not produce activity during more than two consecutive rotations.

Complex.- Identify the complex through its approximate coordinates. The coordinates may vary slightly during your activity period.
Rotations.- The rotations in which the first and last spots appeared.
Dates.- The months in which the first and last spots appeared.

Diagrams Longitude - Time.-

The following diagrams shown, for each rotation and each hemisphere, a band that covers 360° longitude and 20° or 30° latitude. The sections are arranged vertically so that the recurrence of activity in certain lengths can be appreciated.