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Interpretation of ground deformation in the Azores
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Autores
Orientador(es)
Resumo(s)
Geodetic measurements in Fayal, Pico and San Jorge showed some horizontal expansion of these islands. The total expansion during the interval 1936-1979 amounts to· several metres, being considerably greater than the average sea floor spreading for that area of the Atlantic Ocean. This suggests that the spreading could be a discontinuous phenomenon, depending on short lived epochs of quick strain release. A vertical pulsation on the central part of Pico volcano was also detected; the pulsation has amplitude of about one metre and period close to one year. Its-seems due to periodic changes of pressure inside the magma chamber.
Descrição
International Symposium on the Activity of Oceanic Volcanoes. Ponta Delgada, 4-9 August 1980.
Palavras-chave
Geodesy Geology Volcanic Soils Azores Archipelago
Contexto Educativo
Citação
MACHADO, Frederico (1982). Interpretation of ground deformation in the Azores. "Arquipélago. Série Ciências da Natureza", 3: 95-112.