What's new is that they have determined the circumstances under which the upper atmosphere goes into this almost overcooling mode following significant heating - just like having a stuck thermostat - it's really a case of nature ‘reining itself in.’ As the Earth’s upper atmosphere expands during the solar storms, the satellites in the lower orbit have to travel through more gaseous particles which produce stronger drag force and consequently causes decays in their orbits and burning up in the atmosphere.
Solar storms can cause the temperatures of the upper atmosphere to soar up to 399 °C (750 °F) while the nitric oxide can subsequently cool it down by approximately 517 °C (930 °F).
The solar flares and CMEs can cause damage to satellites orbiting the Earth, widespread power outages, and disruptions to GPS service, as they release billions of tons of solar particles, traveling to our planet with speeds over 1.6 million km/h. Solar storms have influenced our planet throughout the history. For example, a CME produced in 1989 triggered the collapse of the Hydro-Quebec's electricity transmission system which left six million people without power. A much earlier solar storm in 1859, named the Carrington Event, produced auroras and disrupted telegraph communications all the way from the North Pole to the Central Americas and even caused fires that killed several people.
Source reference: https://watchers.news/2016/12/17/solar-storms-earth-thermostat-study/