Why there's a ring of natural disasters around the Pacific

Vox on Youtube explains that the belt of volcanic activity is called the Ring of Fire.

The Ring of Fire is a band of volcanoes and frequent earthquakes that runs from New Zealand, up through Eastern Asia, across the Bering Strait and all the way down to the Southern tip of Chile. Volcanoes, earthquakes, and tsunamis appear around the boundaries of the several, fast moving, tectonic plates that make up the region. When the plates collide, they create areas of volatility. 

The Ring of Fire certainly sees more natural disasters than anywhere else on Earth, but what makes it particularly dangerous is that few countries are prepared.