Ternate seismic region where active volcanic activity and frequent earthquakes are common. Ternate belongs to a group of islands that make up the Ring of Fire, known as the Circum-Pacific Belt. Around 90% of the world’s earthquakes and seismic activity occur in this arc in the base of the Pacific Ocean. The region consists almost entirely of an uninterrupted chain of volcanic arcs and oceanic trenches, and experiences continual plate movement. There are 452 volcanoes in the Pacific Ring of Fire, accounting for 75% of the world’s dormant and active volcanoes. Ternate is dominated by the volcanic Mount Gamalama (1715 m).
Circum-Superior Belt margin. The last collision occurred on the southeastern portion of the Superior craton to produce the Grenville orogeny 1,100 million years ago. Because most of the Circum-Superior Belt was formed by widespread mafic-ultramafic magmatism 1,884 to 1,864 million years ago along the Superior craton margin during these orogenies, a number of different suggestions have been made to explain the questionable origins of this large igneous province. It is also not clear if the Circum-Superior Belt has a single origin or it has several origins. Suggestions include back-arc rifting, foredeep flexure, mantle plumes and the breakup of a microcontinent. The geochemical