DYNAMICS OF ACTIVE LONGITUDES AS INFERRED FROM SUNSPOT OBSERVATIONS

摘要

The data from the Greenwich Observatory for 1879-2002 (cycles 12-23) have been used to plot a time (years) vs. Carrington longitude diagram of distribution of the rotation-summed sunspot areas. Then, the active longitudes have been identified on these diagrams by intensive long-lived features (sunspot formation zones). The behaviour of the active longitudes (their location, shift, and intensity variations) has been analysed over the entire time interval under consideration.