On the distribution and asymmetry of solar active prominences

The paper presents the results of a study of the distribution and asymmetry of solar active prominences (SAP) for the period 1957-1998 (solar cycles 1 9-23). The east-west (E-W) distribution study shows that the frequency of S AP events in the 81-90 degrees slice tin longitude) near the east and west limbs is up to 10 times greater than in the 1-10 degrees slice near the cen tral meridian of the Sun. The north-south (N-S) latitudinal distribution sh ows that the SAP events are most prolific in the 11-20 degrees slice in the northern and southern hemispheres. Further, the E-W asymmetry of SAP event s is not significant. The N-S asymmetry of SAP events is significant and it has no relation with the solar maximum year or solar minimum year during s olar cycles. Further, the present study also shows that the N-S asymmetry f or cycles 19-23 follows and confirms the trend of N-S asymmetry cycles as r eported by Vet-ma (1992).