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Volcanic eruptions that rated 6 on the volcanic explosivity index. Such eruptions release a tephra volume of at least 10 km 3 (2.4 cu mi) with profound long-term effects on the surrounding area and noticeable short-term effects on global climate.
Volcanism, vulcanism, volcanicity, or volcanic activity is the phenomenon where solids, liquids, gases, and their mixtures erupt to the surface of a solid-surface astronomical body such as a planet or a moon. [1]
Compositional analysis has been very successful in the grouping of volcanoes by type, [9]: 274 origin of magma, [9]: 274 including matching of volcanoes to a mantle plume of a particular hotspot, mantle plume melting depths, [10] the history of recycled subducted crust, [9]: 302–3 matching of tephra deposits to each other and to volcanoes of ...
Volcanoes known to have Hawaiian activity include: Puʻu ʻŌʻō, a parasitic cinder cone located on Kilauea on the island of Hawaiʻi which erupted continuously from 1983 to 2018. The eruptions began with a 6 km (4 mi)-long fissure-based "curtain of fire" on 3 January 1983. These gave way to centralized eruptions on the site of Kilauea's east ...
Karioi or Mount Karioi is a 2.4 million year old extinct stratovolcano 8 km (5.0 mi) SW of Raglan in the Waikato region of New Zealand's North Island.It was the earliest of the line of 6 calcalkalic volcanoes, the largest of which is Mount Pirongia (the others are at Kakepuku, Te Kawa, Tokanui, Waikeria and probably Puketotara). [4]
The 1991 eruption rated 6 on the Volcanic Explosivity Index and came some 450–500 years after the volcano's last known eruptive activity. The eruption ejected about 10 km 3 (2.4 cu mi) of material, making it the largest eruption of the 20th century since that of Novarupta in 1912 and some ten times larger than the 1980 eruption of Mount St ...
Philippine authorities ordered the evacuation of residents living near a volcano in central Philippines on Tuesday following an eruption that sent a five km (three miles) high ash cloud into the sky.
The conversion of sulfur dioxide to sulfuric acid, which condenses rapidly in the stratosphere to form fine sulfate aerosols. A volcanic winter is a reduction in global temperatures caused by droplets of sulfuric acid obscuring the Sun and raising Earth's albedo (increasing the reflection of solar radiation) after a large, sulfur-rich, particularly explosive volcanic eruption.