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Sangeang Api volcano (Sunda Islands, Indonesia): eruption continues, ash spreads to Australia

Sat, 31 May 2014, 08:45
08:45 AM | BY: T
Eruption column and pyroclastic flow over water at Sangeang Api yesterday (picture: Sofyan Efendi)
Eruption column and pyroclastic flow over water at Sangeang Api yesterday (picture: Sofyan Efendi)
NASA satellite image of the ash plume and continuing ash emissions this morning (annotation: Culture Volcan)
NASA satellite image of the ash plume and continuing ash emissions this morning (annotation: Culture Volcan)
MODIS hot spots at Sangeangapi (MODVOLC, Univ. Hawaii)
MODIS hot spots at Sangeangapi (MODVOLC, Univ. Hawaii)
Aerosols from yesterday's eruption spreading towards Australia (ESA)
Aerosols from yesterday's eruption spreading towards Australia (ESA)
Eruptions continue at the volcano after yesterday's major explosion. Dense ash plumes rising from the summit crater can be seen on this morning's satellite images, and a MODIS hot spot is visible on the latest satellite data, suggesting fresh magma continues to arrive at the volcano's summit crater.
In the meanwhile, the ash and SO2 plume has drifted and spread over more than 3000 km to the E and SE, covering a vast area that includes parts of northern and eastern Australia. All flights from Darwin airport have been cancelled because of the hazardous ash cloud.
A wealth of photos of the eruption taken from various viewpoints (neighboring islands, boats, in-flight) have emerged on social media and elsewhere. Among other details (i.e. that the height of the plume originally reported by VSI, only 3km) was a large underestimation and is more close to 15-20 km as estimated by VAAC Darwin.
At least 2 pyroclastic flows were produced by partial collapse of the eruption column. This can be seen on pictures taken during the early stages of the eruption. At least one of these flows crossed the shore and continued to travel for about 2-3 km above the sea water (see picture by Sofyan Efendi).
An interesting collection of images can be found at Culture Volcan's post about the eruption.

Previous news

Wed, 28 May 2014, 06:00

Sangeang Api volcano (Indonesia) - Smithsonian / USGS Weekly Volcanic Activity Report for 28 May-3 June 2014 (New Activity / Unrest)

PVMBG reported that during January-29 May diffuse white plumes rose at most 25 m above Sangeang Api's crater. On 30 May seismicity increased, with tremor starting at 0500 and becoming continuous at 1348. An eruption at 1555 generated an ash plume that rose 3 km and drifted W, causing ashfall over the sea. ... Read all
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Sangeang Api volcano
complex volcano 1949 m / 6,394 ft
Flores Sea, Indonesia, -8.2°S / 119.07°E
Current status: normal or dormant (1 out of 5) Sangeang Api volcano eruptions:
30 May 2014 (subplinian), 1997-99, 1985-88, 1966, 1964-65, 1958, 1957, 1956, 1955, 1954, 1954, 1953, 1927, 1912, 1911, 1860, 1821, 1715, 1512.
Typical eruption style
Explosive and effusive
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