Report on Cerro Negro (Nicaragua) — April 1983
Scientific Event Alert Network Bulletin, vol. 8, no. 4 (April 1983)
Managing Editor: Lindsay McClelland.
Cerro Negro (Nicaragua) Gas column; fumarole hotter than in mid-1982
Please cite this report as:
Global Volcanism Program, 1983. Report on Cerro Negro (Nicaragua). In: McClelland, L. (ed.), Scientific Event Alert Network Bulletin, 8:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198304-344070.
12.506°N, 86.702°W; summit elev. 728 m
All times are local (unless otherwise noted)
A small column of gases was observed in March, but there was no seismic activity. A fumarole temperature of 337°C was measured, 17° higher than in mid-1982.
Geologic Background. Nicaragua's youngest volcano, Cerro Negro, was created following an eruption that began in April 1850 about 2 km NW of the summit of Las Pilas volcano. It is the largest, southernmost, and most recent of a group of four youthful cinder cones constructed along a NNW-SSE-trending line in the central Marrabios Range. Strombolian-to-subplinian eruptions at intervals of a few years to several decades have constructed a roughly 250-m-high basaltic cone and an associated lava field constrained by topography to extend primarily NE and SW. Cone and crater morphology have varied significantly during its short eruptive history. Although it lies in a relatively unpopulated area, occasional heavy ashfalls have damaged crops and buildings.
Information Contacts: D. Fajardo B., INETER.