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The Azores hotspot is marked 1 on map. The Azores hotspot is a volcanic hotspot in the Northern Atlantic Ocean. The Azores is relatively young and is associated with a bathymetric swell, a gravity anomaly and ocean island basalt geochemistry. [1] The Azores hotspot lies just east of the Mid-Atlantic Ridge [2]
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.
Prior to the Cumbre Vieja eruption on the island of La Palma on September 20, 2021, over 25,000 earthquakes were recorded starting on September 10. Since the 1971 Teneguía eruption, the volcano has remained very active, as since October 2017 until the 2021 eruption alone, nine earthquake swarms occurred. As a result of the Cumbre Vieja ...
The Coromandel Volcanic Zone contains andesitic and rhyolitic eruptives mainly. Mayor Island just off the Coromandel east coast is a rhyolitic caldera that last erupted only about 6,340 years ago. [10] The Tauranga Volcanic Centre on the east coast was active with andesitic and rhyolitic events between 2.95 and 1.9 million years ago. [11]
A magmatic lull is a period of declined magmatic activity in volcanically active regions. They may occur as a result of underthrusting of hinterland lithosphere beneath a volcanic arc, changes in subduction parameters such as relative velocity, direction and slab dip (e.g. flat slab subduction), [1] arc-arc collisions [2] and subduction hinge advance. [1]
The volcanic island of Anak Krakatau in Indonesia saw an eruption on 22 December 2018 which caused a deadly tsunami, with waves surging up to five meters in height. The tsunami killed at least 437 ...
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]
Map of notable volcanic eruptions: Image title: Map of notable volcanic eruptions by CMG Lee. The apparent volume of each bubbles is linearly proportional to the volume of tephra ejected (i.e. their radius is linearly proportional to the cube root of the volume of tephra ejected), colour-coded by time of eruption as in the legend.