Sketch map of the El Hoyo volcanic complex and Cerro Negro. After Bice (1980).
Las Pilas volcano erupciones
campo volcánico 1088 m / 3,570 ft
Nicaragua, 12.5°N / -86.69°W
Lista de erupción: 1994 (?), 1954, 1952, 1528 (?)
1994 possible phreatic eruption
A possible small phreatic eruption could have occurred at Las Pilas volcano in early 1994. A dense white steam plume was visible on 3 March from at least 10 km south of the volcano.
Geologist visiting the area found a new(?) circular, 10 m diameter pit crater on the upper southern slope of the main crater as the source of the plume. The pit had vertical walls covered with sulfur deposits. 50-75 m to the W, another larger circular pit crater measuring about 30-40 m in diameter was observed.
(Source: Smithsonian / GVP monthly reports
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