 Wide angle (15mm on 35mm sensor) view of the whole crater (caldera) of Nyiragongo with its lava lake...  Woman with child (Photo: Tobias Schorr)
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Dictionnaire
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Alaid
volcan
Alaid est le volcan plus haut et les plus au nord dans les îles Kouriles. Le stratovolcan symétrique s'élève à 3000 m de fond de la mer et forme une petite île. Il possède un cratère de 1,5 km de large sommet violé au sud. Il est un des volcans les plus actifs des Kouriles. Grandes éruptions explosives a eu lieu en 1790 et 1981 et ont été parmi les plus importants dans les Kouriles à l'époque historique.
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Type de volcan |
stratovolcan en sommeil |
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Place |
New Britain Island, Papouasie-Nouvelle Guinée, -5.63°S / 150.53°E |
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Elévation du sommet |
2339 m / 7,674 ft |
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Eruptions du volcan Alaid |
1997, 1996, 1986, 1982, 1981, 1972, 1933-34, 1894, 1860, 1854, 1790-93 |
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Style éruptif tipique |
Explosive |
Numerous flank cones dot the lower flanks of the basaltic to basaltic-andesite Alaid volcano, particularly on the NW and SE sides, including an offshore cone formed during the 1933-34 eruption.
Alaid has 2 types of eruptions: summit activity from the central crater as well as lateral eruptions. The eruptions from the central crater tend to be more explosive and are more dangerous. The largest eruptions from the central crater were in February 1793, June 1854, July 1860, 1894, and April 1981.
The principal volcanic hazard from Alaid are ash plumes dangerous for aircraft (many routes from N-America to Asia pass nearby).
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