Report on San Cristobal (Nicaragua) — February 1980
Scientific Event Alert Network Bulletin, vol. 5, no. 2 (February 1980)
Managing Editor: David Squires.
San Cristobal (Nicaragua) Large white plume
Please cite this report as:
Global Volcanism Program, 1980. Report on San Cristobal (Nicaragua) (Squires, D., ed.). Scientific Event Alert Network Bulletin, 5:2. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198002-344020.
12.702°N, 87.004°W; summit elev. 1745 m
All times are local (unless otherwise noted)
A large white plume was observed from the air. Remote sensing of SO2 revealed very low levels as compared to records from monitoring over the last 8 years.
Geologic Background. The San Cristóbal volcanic complex, consisting of five principal volcanic edifices, forms the NW end of the Marrabios Range. The symmetrical 1745-m-high youngest cone, named San Cristóbal (also known as El Viejo), is Nicaragua's highest volcano and is capped by a 500 x 600 m wide crater. El Chonco, with several flank lava domes, is located 4 km W of San Cristóbal; it and the eroded Moyotepe volcano, 4 km NE of San Cristóbal, are of Pleistocene age. Volcán Casita, containing an elongated summit crater, lies immediately east of San Cristóbal and was the site of a catastrophic landslide and lahar in 1998. The Plio-Pleistocene La Pelona caldera is located at the eastern end of the complex. Historical eruptions from San Cristóbal, consisting of small-to-moderate explosive activity, have been reported since the 16th century. Some other 16th-century eruptions attributed to Casita volcano are uncertain and may pertain to other Marrabios Range volcanoes.
Information Contacts: R. Stoiber, S. Williams, and M. Bruzga, Dartmouth College.