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
2010 eruptions of Mount Merapi Authority (Red Cross) responded to appeals by Indonesian officials to assist the Yogyakarta population and is providing a field hospital. According to head of medical services at the UAE Interior Ministry Brig. Salem Al-Junaibi is to be staffed by medical and administrative workers and will be set up within the 'safe zone' more than 20 km from the mountain. Acute respiratory infection, hypertension, and headache were affecting Mount Merapi eruption survivors. "The displaced people are so vulnerable to these diseases," an official of the Health Ministry Supriyantoro stated on Sunday, 7 November. Refugees received medical treatment at clinics set up