Report on Awu (Indonesia) — 16 June-22 June 2004
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 16 June-22 June 2004
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2004. Report on Awu (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 16 June-22 June 2004. Smithsonian Institution and US Geological Survey.
3.689°N, 125.447°E; summit elev. 1318 m
All times are local (unless otherwise noted)
During 15-16 June, there was no significant volcanic or seismic activity at Awu. "White smoke" rose about 50-100 m above the summit. Awu remained at Alert Level 3 (on a scale of 1-4).
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.