My research suggest the earth would experience the escalated weather phenomenon if there were No Humans On Earth Today. It is the SUN cycles. This latest NASA report also confirms my research which suggest it is the Suns effect on Earth's Magnetic Field, which in turn, effects our jet streams and weather patterns. Also, there are some researchers which state the Magnetic Shift actually has a centrifugal force effect on the core of the Earth, causing the waters to warm. This phenomenon would also cause the sharp increase in volcanic activity and even earthquakes.
Most people think of the sun as a featureless, unchanging ball of light.
But the Sun actually has seasons, or cycles of activity and relative inactivity. Right now, we are approaching the maximum activity phase of the current solar cycle. The Sun is daily exhibiting hundreds of sunspots, as well as many flares and coronal mass ejections. We feel the effects of an active Sun here on Earth - radio communications, power distribution, orbiting spacecraft and even the weather are all affected. Sunspots are relatively cool areas on the Sun that appear as dark blotches.