The standards for documentaries nowadays are very high. You need to succeed not only in the educational side of the story but also in entertaining the viewer. As an example, Greg Macgillivray's work in The Living Seas, Stormchasers or The Magic of Flight does everything in order to keep you on the edge of your seat without loosing the story's edge. Here, you can learn a lot from the sysmic and volcanic activities that determine most aspects of the people that live inside the Pacific Rim. Nevertheless, you never feel quite engaged and/or commited to the story as you do with the formerly referred work. The story starts with a visit to Chile's newly born Navidad crater and leads us through a journey that involves San Francisco, the Aleutian Islands, the coasts of the former U.S.S.R., Japan, Hawaii and Indonesia. Anyhow, some shots are impressive- like San Francisco's earthquake recordings- some are really dull. The video and audio quality are very good, though not impressive. Unless you want to complete your dvd collection, try other stuff such as the discs referred above or Africa-The Serengetti or Imax-Alaska.