Report on Pagan (United States) — November 1982
Scientific Event Alert Network Bulletin, vol. 7, no. 11 (November 1982)
Managing Editor: Lindsay McClelland.
Pagan (United States) Tephra ejection
Please cite this report as:
Global Volcanism Program, 1982. Report on Pagan (United States) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 7:11. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198211-284170.
18.13°N, 145.8°E; summit elev. 570 m
All times are local (unless otherwise noted)
Personnel on a USN training flight observed activity at Pagan when they flew near the volcano about 1415 on 10 December. A hole roughly 60 m below the crater rim on the NW side was spewing debris and brown smoke. Light-colored vapor was emerging from the center of the crater. Burning was seen along the S and SW slopes, but a cause could not be determined [see 8:3].
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: Cmdr. J. Walker and Lt. J. Meyer, COMNAVMAR.