Report on Farallon de Pajaros (United States) — October 1990
Bulletin of the Global Volcanism Network, vol. 15, no. 10 (October 1990)
Managing Editor: Lindsay McClelland.
Farallon de Pajaros (United States) Vigorous fuming
Please cite this report as:
Global Volcanism Program, 1990. Report on Farallon de Pajaros (United States) (McClelland, L., ed.). Bulletin of the Global Volcanism Network, 15:10. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199010-284140
Farallon de Pajaros
20.546°N, 144.893°E; summit elev. 337 m
All times are local (unless otherwise noted)
"Photographs taken by Civil Defense personnel in early August 1990 from a fixed-wing airplane showed vigorous fuming."
Geological Summary. The small 2-km-wide island of Farallon de Pajaros (also known as Uracas) is the northernmost and most active volcano of the Mariana Islands. Its relatively frequent historical eruptions dating back to the mid-19th century have caused the andesitic volcano to be referred to as the "Lighthouse of the western Pacific." The symmetrical, sparsely vegetated summit is the central cone within a small caldera cutting an older edifice, remnants of which are seen on the SE and southern sides near the coast. Flank fissures have fed lava flows during historical time that form platforms along the coast. Both summit and flank vents have been active during historical time. Eruptions have also been observed from nearby submarine vents, and Makhahnas seamount, which rises to within 640 m of the sea surface, lies about 10 km to the SW.
Information Contacts: R. Moore, USGS; R. Koyanagi and M. Sako, HVO.