Totally unexpected severe geomagnetic storm recorded on 28 June

New Delhi: The US Space Weather Prediction Centre (SWPC) operated by the National Oceanic and Atmospheric Administration (NOAA) has issued an alert for a severe geomagnetic storm observed on 28 June. On 24 July, a filament eruption was observed associated with an active cluster of sunspots rotating out of view. In an associated coronal mass ejection (CME), hot gas or plasma from the outer atmosphere of the Sun was violently dumped into space. This material travels at different speeds, much …