Karangetang Volcano, Sulawesi

Karangetang Volcano, Api Siau, Sulawesi

At the end of May 2009, Karangetang Volcano (1784m.a.s.l.) in Siau Island, 100km northeast of the NE tip of Sulawesi (Indonesia), started a period of violent activity, with strong strombolian eruptions from the summit lava dome and lava flows on the upper flanks. When Doni Wijanto, Tom Pfeiffer, Jorge Santos and Marco reached the island in mid June 2009, the activity had decreased to few ash eruptions per day, small Strombolian bursts and a persistent, but nevertheless spectacular, incadescent lava dome at the summit.

Karangetang Volcano, Api Siau, Sulawesi
11 June 11h, f=12mm at the Volcanological Observatory. Volcanologists at work inform us the best is over....
Karangetang Volcano, Api Siau, Sulawesi
11 June 11h, f=10mm at the Volcanological Observatory. Measuring the volcano's inflation using a precise digital theodolite.
Karangetang Volcano, Api Siau, Sulawesi
11 June 11h, f=10mm at the Volcanological Observatory. Seismograms show the volcano is still active.
Karangetang Volcano, Api Siau, Sulawesi
12 June 16h, f=135mm from upper Salu Batony Valley. Zoom on the active summit dome as seen from the upper south-western flank.
Karangetang Volcano, Api Siau, Sulawesi
12 June 03h, f=50mm from Ulusiau. Moonlit southern slopes of the volcano, with the glowing summit dome and black lava flows; palm trees in the forground.
Karangetang Volcano, Api Siau, Sulawesi
12 June 03h, f=300mm from Ulusiau. Zoom on the glowing summit dome, with fresh black lava flows erupted a week before.
Karangetang Volcano, Api Siau, Sulawesi
12 June 20h, f=135mm from upper Salu Batony Valley. This mild Strombolian activity at the summit dome will last less than one hour.
Karangetang Volcano, Api Siau, Sulawesi
12 June 21h, f=50mm from the Volcanological Observatory. Vega (at right) and Dragon's Head (at left) rise over the glowing dome and the perfect dark cone.
Karangetang Volcano, Api Siau, Sulawesi
12 June 18h, f=10mm from Tonggeng Tangaliang, SW of the volcano. The beautiful bay near Pehe Village with the double peak of Karangetang in the background.
Karangetang Volcano, Api Siau, Sulawesi
12 June 18h, f=135mm from Tonggeng Tangaliang. A small ash eruption from the summit dome.
Karangetang Volcano, Api Siau, Sulawesi
12 June 18h, f=135mm from Tonggeng Tangaliang. The ash eruption triggers small rock avalanches on the upper western slope.
Karangetang Volcano, Api Siau, Sulawesi
12 June 19h, f=135mm from Tonggeng Tangaliang. Magic twilight behind the glowing dome.
Photos taken by Marco Fulle with a digital reflex camera (sensor 16x24mm).