Study from Finland shows a connection between the northern lights and the weather on Earth. This is also reflected in the winter electricity bill.
Strong geomagnetic activity across the country can lead to warmer weather and lower electricity consumption during the winter season. Particles that cause auroras can disrupt ozone. Changes in ozone affect the temperature in the polar stratosphere. In winter, ozone depletion is accompanied by a cooling of the stratosphere and increases swirling cold winds. A weaker polar vortex is a whirlpool of cold air that blows around the polar region in winter.