Wednesday, 13 February 2013

Explosive Eruption at Paluweh Volcano

Although the summit of Indonesia’s Paluweh (also known as Rokatenda) is shrouded by clouds, evidence of a recent eruption is visible on the slopes of the island volcano in this satellite image. After months of rumbling, an explosive eruption occurred on February 2 and 3, 2013. Gray ash from the eruption covers the southern slopes of the peak in this natural-color image. A lighter gray swath running from the hidden summit to the ocean traces the path of a volcanic landslide, likely the remnants of a pyroclastic flow. A brand-new delta extends into the Flores Sea at the foot of the flow. To the northwest, airborne ash swirls around the island. Green vegetation appears relatively untouched, but ash has destroyed many of the island’s crops, according to the Jakarta Globe.

Erik Klemetti, author of the Eruptions Blog, suggested that the eruption may have been caused by the collapse of an unstable lava dome. The number of small tremors and emissions of ash at Paluweh increased in October 2012, and continued into February 2013, perhaps indicating growth of the lava dome. This image was collected on February 12, 2013, by the Advanced Land Imager (ALI) on the Earth Observing-1 (EO-1) satellite. According to the Darwin Volcanic Ash Advisory Center (VAAC), Paluweh has experience minor ash and gas emissions almost daily since the initial blast.
NASA Earth Observatory image by Jesse Allen and Robert Simmon, using EO-1 ALI data from the NASA EO-1 team. Caption by Robert Simmon.

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