Report on Cerro Negro (Nicaragua) — December 1996
Bulletin of the Global Volcanism Network, vol. 21, no. 12 (December 1996)
Managing Editor: Richard Wunderman.
Cerro Negro (Nicaragua) Fumarole temperatures decrease further
Please cite this report as:
Global Volcanism Program, 1996. Report on Cerro Negro (Nicaragua). In: Wunderman, R. (ed.), Bulletin of the Global Volcanism Network, 21:12. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199612-344070.
12.506°N, 86.702°W; summit elev. 728 m
All times are local (unless otherwise noted)
On 23 December a visit to the crater found that the maximum fumarole temperature was only 606°C, indicating a decrease by another 30°C since the previous measurements on 27 November (BGVN 21:11).
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: Alain Creusot, Instituto Nicaraguense de Energía, Managua, Nicaragua.