On the possibility of inferring the solar and interplanetary sector structure from statistics of geomagnetic storms and solar activity

As an illustration of this, different analyses of solar-geomagnetic correlations have been considered in relation to the paper by Wilcox and Colburn (1972) on the observed sector struc- ture. Indications are found that (a) the interplanetary and solar sector pattern in the years 1919-1969 consisted of mainly 2 or 4 sectors per solar rotation, and (b) sector boundaries are related to bipolar magnetic regions on the Sun.