Report on Pagan (United States) — October 1988
Scientific Event Alert Network Bulletin, vol. 13, no. 10 (October 1988)
Managing Editor: Lindsay McClelland.
Pagan (United States) Moderate ash emission; plume altitude corrected
Please cite this report as:
Global Volcanism Program, 1988. Report on Pagan (United States) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 13:10. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198810-284170.
18.13°N, 145.8°E; summit elev. 570 m
All times are local (unless otherwise noted)
On 12 October at 1050, a U.S. Air Force pilot noted a plume that extended 1.5-7.5 km at <1 km altitude. The plume was not evident on satellite images.
Geologic Background. Pagan Island, the largest and one of the most active of the Mariana Islands volcanoes, consists of two stratovolcanoes connected by a narrow isthmus. Both North and South Pagan stratovolcanoes were constructed within calderas, 7 and 4 km in diameter, respectively. The 570-m-high Mount Pagan at the NE end of the island rises above the flat floor of the northern caldera, which may have formed less than 1000 years ago. South Pagan is a 548-m-high stratovolcano with an elongated summit containing four distinct craters. Almost all of the historical eruptions of Pagan, which date back to the 17th century, have originated from North Pagan volcano. The largest eruption of Pagan during historical time took place in 1981 and prompted the evacuation of the sparsely populated island.
Information Contacts: M. Matson, NOAA.