The 1951 eruption of Mount Lamington, Papua New Guinea: Devastating directed blast triggered by small-scale edifice failure

Авторы: Belousov A., Belousova M., Hoblitt R., Patia H.
Журнал: Journal of Volcanology and Geothermal Research
Номер: 401
Год издания: 2020
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 106497
DOI: 10.1016/j.jvolgeores.2020.106947
Аннотация: The catastrophic explosion of Mount Lamington volcano, Papua New Guinea on January 21, 1951 produced a devastating pyroclastic density current (PDC) that knocked down dense tropical rainforest over an area of 230 km2 and killed approximately 3000 people. We present results of a field reinvestigation of the 1951 PDC deposit combined with an analysis of the available photographs and eyewitness accounts of the eruption first published in the fundamental work of G. A. M. Taylor (1958). We have concluded that the six-days-long pre-climactic activity before the 1951 eruption (which included felt local seismicity, frequent ash-laden explosions of vulcanian type, bulging of the volcano slope accompanied with landslides) was associated with shallow-level intrusion of a highly viscous magma body (cryptodome/dome) of andesitic composition with a volume of approximately 0.01 km3. This intrusion destabilized Mount Lamington's prehistoric intra-crater lava dome.
Добавил в систему: Белоусов Александр Борисович

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