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Although dormant, Santorini is an active volcano. Numerous minor and medium-sized, mainly effusive, eruptions have built the dark-colored lava shields of Nea and Palea Kameni inside the caldera. Their last eruption was in 1950, and now only fumarolic activity, primarily inside the recently active craters, takes place. [2]
Often, a volcano may have a deep magma chamber many kilometers down, which supplies a shallower chamber near the summit. The location of magma chambers can be mapped using seismology : seismic waves from earthquakes move more slowly through liquid rock than solid, allowing measurements to pinpoint the regions of slow movement which identify ...
World map of active volcanoes and plate boundaries Kīlauea's lava entering the sea Lava flows at Holuhraun, Iceland, September 2014. An active volcano is a volcano that has erupted during the Holocene (the current geologic epoch that began approximately 11,700 years ago), is currently erupting, or has the potential to erupt in the future. [1]
Mount Tambora, or Tomboro, is an active stratovolcano in West Nusa Tenggara, Indonesia. Located on Sumbawa in the Lesser Sunda Islands , it was formed by the active subduction zones beneath it. Before the 1815 eruption , its elevation reached more than 4,300 metres (14,100 feet) high, making it one of the tallest peaks in the Indonesian ...
Bagana is an active volcanic cone located in the centre of the island of Bougainville, Papua New Guinea, the largest island of the Solomon group. It is the most active volcano in the country, occupying a remote portion of central Bougainville Island. It is one of Melanesia's youngest and most active volcanoes.
Niseko Volcanic Group is a volcanic group of active stratovolcanoes and lava domes situated in Hokkaidō, Japan. The volcanoes are younger than 400,000 years. The last eruption was 6,000 to 7,000 years ago. Today Iwaonupuri shows fumarolic activity. [2]
When the volcano erupted in 2003, a 15 m-high (49 ft) island formed above the surface, but it disappeared soon after. Additional eruptive activity was observed and reported in March 2004 and April 2007. [5] [6] More recent volcanic activity can be inferred from observations of discolored water around the volcano, in 2020 and January 2021. [1]
More than 100 eruptions have occurred in the past 20 million years with a broad range of eruptive styles. [2] These volcanic processes have created a range of different volcanic landforms, including stratovolcanoes, [4] shield volcanoes, [5] lava domes [6] and cinder cones, [7] along with a few isolated examples of rarer volcanic forms such as tuyas. [8]
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