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Submarine eruption near Tonga: Pumice raft observed on 16 Nov, but origin volcano remains unknown

lun, 28 nov 2016, 17:50
17:50 PM | AUTORE: T
Location of the observed pumice rafts (image: GeoNet)
Location of the observed pumice rafts (image: GeoNet)
It is still unclear which volcano produced the pumice raft observed west of Minerva Reef southwest of Tonga (Pacific Ocean) by a New Zealand Royal Air Force aircraft on 16 November.
The pumice rafts were long ribbons, 10 km long and tens to hundreds of meters wide according to satellite images, likely as the combined result of sea waves, winds and currents.The area is between several volcanic arcs: Vanuatu to the north, Tonga arc to the east, and the Kermadec arc to the southeast. New Zealand geologists do not think that it is likely to come from Monowai submarine volcano, but rather think it might be one of the volcanoes in Tonga. However, the origin of the pumices remains a riddle and illustrates how little we know about submarine eruptions.

News precedente

Fri, 14 Nov 2014, 07:31

Vulcano sottomarino Monovai (isole Kermandec): eruzioni avvennero in ottobre 2014

Pumice raft observed on 31 Oct near Monovai seamount (RNZAF via GeoNet)
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Mon, 13 Aug 2012, 10:05

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L'eruzione ha riferito su 11 agosto era più probabile da Havre sottomarino. ... Read all
Mostra di più
Monowai vulcano
vulcano sottomarino -132 m / - 433 ft
Kermandec Islands, New Zealand, -25.89°S / -177.19°W
Stato attuale: normal or dormant (1 di 5) Eruzioni del vulcano Monowai:
2008, 2006, 2005, 2003, 2002 (Nov), 2002 (May), 1999, 1997-98, 1997 (Apr), 1996, 1995, 1990-91, 1988, 1986, 1982, 1980, 1979, 1978, 1977 (Oct), 1977 (Apr), 1944(?)
Stile eruttivo tipico
explosive
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