Geology of the Pacific Ocean Guinea, and New Zealand lie outside the andesite line. Outside of the andesite line, volcanism is explosive; the Pacific Ring of Fire is the world's foremost belt of explosive volcanism. The Ring of Fire is named after the several hundred active volcanoes that sit above the various subduction zones. In 2009, the deepest undersea eruption ever recorded occurred at the West Mata submarine volcano, a mile beneath the ocean, close to the Tonga-Kermadec Trench, within the Ring of Fire; it was filmed by the US Jason robotic submersible which descended over . The Pacific Ocean is the only ocean which
Ethnic groups in the Philippines culture and language. In the late 19th century. The Philippines has over 180 indigenous ethnic groups, over half of which represent unique linguistic groups. There are more than 100 highland, lowland, and coastland tribal groups in the Philippines. These include: The Philippines consists of a wide number of settlers that form part of the national population. They immigrated or descended from various countries, most notably Japan, Spain, China, India, and the United States. Ethnic groups in the Philippines The Philippines is inhabited by more than 175 ethnolinguistic nations, the majority of whose languages are Austronesian in origin, then Han Chinese,