## 1 Introduction
[49] pointed out the unusual appearance of differently shaped EPBs within a narrow longitude range using GOLD data. This could be due to small-scale longitudinal discrepancies in the electric field, E-layer electron density, alterations in neutral wind, or an amalgamation of these parameters. Concurrent investigation of GOLD and ionosonde observations to determine EPB occurrence rate and EIA morphology over an extended longitude region have been performed during the 23-29 September 2020 geomagnetic storm [50]. Statistical analysis of GOLD observations resulted in a significant knowledge on EPB climatology, its periodicity (3 and 6 days), and inverse geomagnetic activity dependencies during various phases of storms [51]. The development of EPBs can be modulated or inhibited depending on the orientation and strength of the ionospheric electric fields, the regular characteristics of which are modified during the magnetically disturbed periods. The consequences, however, can be very confined and vary from storm to storm and location to location. Earlier researchers have reported the presence of enhanced [52; 53; 54; 55] or suppressed [56; 57] scintillations/EPBs during different geomagnetic storms. Their studies suggest relatively stronger E \(\times\) B vertical drifts in the local evening sector due to the superposition of storm-induced eastward penetrating electric fields with the regular electric fields to favor RTI manifestation. Conversely, [PERSON] et al. [56] showed a clear absence of scintillation over the anomaly crest region station Pingtung, Taiwan during the St. Patrick's Day geomagnetic storm (17 March 2015). [PERSON] et al. [57] also conducted a regional study over American, African and Indian longitudinal sectors where the Indian sector exhibited the storm inhibition characteristics in five major geomagnetic storms of the equinoctial months during 2012-2013. The suppression in scintillation is due to westward penetrating electric fields and disturbance dynamo electric fields which creates an unfavorable scenario for RTI manifestations by bringing down the altitude of PRE [58; 59]. Further studies on the ROTI parameters along the Asian longitudes during different equinoctial geomagnetic conditions reveal triggering and suppression effects of EPBs during the main and recovery phases, respectively [60]. [PERSON] et al. [61] employed multi-instrumental (ground-based and spaceborne) and multi-station data to study the onset and suppression of ionospheric perturbations across large longitude sectors during moderate to severe geomagnetic storms. The results show that the enhancement (suppression) of the EPBs varies with the onset of the storm and eastward (westward) penetrating electric fields. Further, modeling studies of [PERSON] et al. [62] emphasize the role of penetration electric fields in the enhancement or suppression of the EPBs around the global equatorial belt. Although most extreme scintillation activity is expected to occur near the equatorial region during geomagnetic storms, the severity of the scintillations may vary depending on the onset time of the storm and phase of the storm (main or recovery) [52; 62]. Despite many studies, the occurrence of equatorial plasma bubbles during magnetic storms has not been fully understood. Concerning the frequency of scintillation activity at the geographic location of the present study, [PERSON] et al. [63] conducted a campaign mode study earlier in November 2011, confirming intense scintillation scenarios on 6 November 2011 that instigated the ionospheric group to exploit TEC irregularities and scintillation indices at the location with the establishment of a GNSS ionospheric scintillation and a TEC monitor (GISTM) receiver at KL University, Guntur, India (Geographic 16\({}^{\circ}\)26\({}^{\prime}\)N, 80\({}^{\circ}\)37\({}^{\prime}\)E and dip 22\({}^{\circ}\)32\({}^{\prime}\)). The recordings from this monitoring unit report weak to strong scintillation activities at times, associated with a specific number of GNSS satellite signals [64; 65; 66; 67].