Report on Awu (Indonesia) — 27 November-3 December 2002
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
27 November-3 December 2002
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2002. Report on Awu (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 27 November-3 December 2002. Smithsonian Institution and US Geological Survey.
3.689°N, 125.447°E; summit elev. 1318 m
All times are local (unless otherwise noted)
Seismicity increased at Awu on 15 November, but during 19-24 November decreased back to "normal levels." There were no surface changes around the volcano's summit. Awu remained at Alert Level 2 (on a scale of 1-4).
Geological Summary. 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.