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Volcanic eruptions that rated 5 on the volcanic explosivity index. Such eruptions release a tephra volume of at least 1 km 3 (0.24 cu mi) with immediate exceptional effects on the surrounding area. For smaller volcanic eruptions that have produced at least 0.1 km 3 (0.024 cu mi) of tephra at a time, see Category:VEI-4 eruptions.
The Bangui magnetic anomaly in central Africa and the Kursk magnetic anomaly in eastern Europe (both in red) In geophysics, a magnetic anomaly is a local variation in the Earth's magnetic field resulting from variations in the chemistry or magnetism of the rocks. Mapping of variation over an area is valuable in detecting structures obscured by ...
Mount Ragang, also called Mount Piapayungan and Blue Mountain by the local people, is an active stratovolcano on Mindanao island in the Philippines.With an elevation of 2,815 metres (9,236 ft), it is the seventh highest mountain in the Philippines and the highest point in the Lanao del Sur province.
The most likely eruption would be hydrothermal rather than volcanic. A caldera-forming volcanic eruption (and subsequent impacts on global weather patterns and agricultural production) is the least likely scenario and has an extremely low likelihood. [254] [255] The Earth's interior is not molten rock.
Map centered between the Ohakuri caldera and Rotorua caldera (light green shading) so as to show selected surface volcanic deposits including all the present surface Mamaku and Ohakuri ignimbrites. Clicking on the map enlarges it, and enables panning and mouseover of volcano name/wikilink and ages before present.
It is part of a string of volcanoes called the Central Mindanao Arc. [1] The Smithsonian Institution's Global Volcanology Program, citing the Catalog of Active Volcanoes of the World (Neumann van Padang, 1953), suggests that some eruptions were actually those of neighboring Ragang volcano. [2] Makaturing is one of the active volcanoes in the ...
The Anahim Volcanic Belt can be organized into three groupings: the western section, which has been reduced to remnants of eruptive breccia, high-level plutons and dike swarms; the central section, which consists of predominantly shield volcanoes; and the eastern section, which comprises several small cinder cones and is the location of all ...
In 2015, researchers found that the volcano's structure bore patterns of magnetic striping on either side, indicating that the volcano is likely a hybrid of a mid-ocean ridge and a shield volcano. Geologic data also indicated that Tamu Massif formed at the junction of three mid-ocean ridges, which was a highly unusual occurrence.