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Eruptions are unlikely to produce waves that extend beyond Crater Lake, but powerful explosions could produce tall waves in the caldera. [89] An eruption as explosive as the one 7,700 years ago is unlikely given that it would require larger volumes of magma than are known to be available within the Mazama vicinity. [ 22 ]
The peak is topped by a 1-kilometre (0.6 mi) wide summit crater, which contained a shallow crater lake until 1959. As of 2006, the crater lake had re-formed. [3] The last verified eruptions from the volcano were about 1,800 years ago, while reports of possible eruptions in 1692 and 1843 are considered uncertain. [1]
Crater Lake Institute Director and limnologist Owen Hoffman states that "Crater Lake is the deepest, when compared on the basis of average depth among lakes whose basins are entirely above sea level. The average depths of Lakes Baikal and Tanganyika are deeper than Crater Lake; however, both have basins that extend below sea level." [19] [21]
Crater Lake actually started as a mountain, Mount Mazama. A volcanic eruption roughly 7,700 years ago caused the mountain to collapse inward over time, forming a volcanic crater, the park says.
Lake Pinatubo, the crater lake resulting from the 1991 eruption, pictured here in 2008. Activity at the volcano remained low until July 1992 when a new lava dome started growing in the caldera. Volcanologists suspected that further violent eruptions could be possible, and some areas were evacuated. However, the eruption was only minor.
The crater again contained an active lava lake between 2008 and 2018, with the level of the lava usually fluctuating between 20 and 150 meters below Halemaʻumaʻu's crater floor, though at times the lava lake rose high enough to spill onto crater floor. The lava lake drained away in May 2018 as new volcanic vents opened in lower Puna. The ...
Trou aux Cerfs (also known as Murr's Volcano) is a dormant, crater lake, cinder cone volcano with a well-defined cone and crater. It is 605 m (1,985 ft) high and located in Curepipe , Mauritius . The crater has been alternately described as 300 [ 1 ] and 350 meters in diameter, [ 2 ] and is 80 meters deep.
More than 30 eruptions have occurred since 1000 AD. [1] In 2007, an effusive explosion filled the crater with a lava dome. It last erupted on 13 February 2014, destroying the lava dome and ejecting boulders, stones and ashes up to West Java about 500 kilometres (310 mi) from Mount Kelud. The crater filled with water during the rainy season. [2] [3]