Part 4/6:
When a storm approached, a drone was launched into the sky, tethered to the ground with a wire. A historic moment unfolded on December 13 when a massive electric current—resulting from an induced lightning strike—flowed down the wire to the surface. Prior to the lightning discharge, the scientists detected a striking voltage of over 2,000 volts in the system. The sudden change in the surrounding electric field triggered the phenomenon.