Solar flares can be excluded from the list of interactions among Earth's spheres.
Fracking for natural gas involves interactions between the geosphere (earth's crust) and the biosphere (impact on living organisms), hurricanes involve interactions between the atmosphere (weather systems) and hydrosphere (water bodies), and volcanic eruptions involve the geosphere and the atmosphere (ash and gases released).
In contrast, solar flares are phenomena that occur outside of Earth, originating from the sun, and primarily affect the magnetosphere and atmosphere, but do not directly interact with the geosphere, hydrosphere, or biosphere in the same interconnected way as the other events listed.