  In this paper, we present the multi-wavelength study of a high level of solar
activity during which a single active region produced multiple flares/CMEs.
According to the sunspot observations, the current solar cycle 24 manifest to
be less intense in comparison with the previous recent sunspot cycles. In the
course of the current sunspot cycle 24, several small and large sunspot groups
have produced various moderate and intense flare/CME events. There are a few
active regions with a large number of flaring activities passed across the
visible disk of the Sun during 2012-2015. In this study, we consider the three
periods 22-29 Oct 2013, 01-08 Nov 2013, and 25 Oct- 08-Nov 2014, during which
228 flares have been observed. Considering only active regions near the central
part of the disk, 59 CMEs (halo or partial) have been reported among which only
39 events are associated with flares. We conclude that an active region with a
larger area, more complex morphology and stronger magnetic field has a
comparatively higher possibility of producing extremely fast CMEs (speed > 1500
km/sec). So that among the 5 X class flares of the reported periods, 3 of them
(60%) are associated with a CME. The lift-off time for CME-flare associated
events has a +15 to+30 minute time interval range after the occurrence time of
associated flares suggesting that the flares produce the CMEs. Additionally, we
compiled the geomagnetic storms occurring within1-5 days after the CME onset.
10% of the 59 CMEs are related to a magnetic storm but all are moderate storms.
