Ring of Fire volcanic eruptions of the last 11,700 years occurred at volcanoes in the Ring of Fire. The Ring of Fire is a direct result of plate tectonics: the movement and collisions of lithospheric plates, especially subduction in the northern portion. The southern portion is more complex, with a number of smaller tectonic plates in collision with the Pacific plate from the Mariana Islands, the Philippines, Bougainville, Tonga, and New Zealand. The presence of a belt of volcanic activity surrounding the Pacific Ocean was observed in the 19th century. "They [the Japanese Islands] are in the line of that immense circle of
Ring of Fire (radio program) as The Ring of Fire Network, and began focusing heavily on Progressive political content. Numerous hosts now appear on the show, including Papantonio, Kennedy, Thom Hartmann, Ed Schultz, Abby Martin, Laura Flanders, Seder, David Pakman, Lee Camp, Mike Malloy, Benjamin Dixon & Cousins. Many of the members of this network are also veteran personalities for other networks, including Free Speech TV, RT and TeleSUR. Also in 2015, the show began a separate site called Drug Safety News for the "specific purpose of highlighting political maneuvers the pharmaceutical industry is taking to influence government decisions, and to expose the dangers and