For many years this resonance frequency has hovered at a steady 7.83 Hz with only slight variations. In June 2014 that apparently changed. Monitors at the Russian Space Observing System showed a sudden spike in activity to around 8.5 Hz. Since then, they have
recorded days where the Schumann accelerated as fast as 16.5 Hz. (The graph is usually blue with some green, and no white.) At first they thought their equipment was malfunctioning, but later learned the data was accurate. Everyone was asking, what’s causing this intermittent spiking activity?