This paper investigates the effects of geomagnetic disturbances that occurred in August 2017, during the declining phase of Solar Cycle 24, when two geomagnetic storms driven by high-speed stream (HSS) and stream interaction region (SIR) structures and associated with HILDCAA intervals took place on 4–6 August and 17–21 August, together with a coronal mass ejection (CME) embedded in the solar wind that impacted the Earth on 22–23 August. The focus of the study is the ionospheric response over th