Report on Awu (Indonesia) — 11 May-17 May 2005
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 11 May-17 May 2005
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2005. Report on Awu (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 11 May-17 May 2005. Smithsonian Institution and US Geological Survey.
3.689°N, 125.447°E; summit elev. 1318 m
All times are local (unless otherwise noted)
At 1715 on 16 May a pilot reported a low-level plume above Awu. No ash was seen in satellite imagery about one hour or eight hours later.
Geologic Background. The massive Gunung Awu stratovolcano occupies the northern end of Great Sangihe Island, the largest of the Sangihe arc. Deep valleys that form passageways for lahars dissect the flanks of the volcano, which was constructed within a 4.5-km-wide caldera. Powerful explosive eruptions in 1711, 1812, 1856, 1892, and 1966 produced devastating pyroclastic flows and lahars that caused more than 8000 cumulative fatalities. Awu contained a summit crater lake that was 1 km wide and 172 m deep in 1922, but was largely ejected during the 1966 eruption.