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Donnerstag, Jan 29, 2015
An exceptional satellite image taken by the European Pléiades satellite from 19 January shows the new island that formed during the eruption near Hunga Ha’apai island (left in images) earlier this month and joined it by forming a new peninsula, composed of a broad, flat ash cone with a water-filled crater. The image also shows that activity seems to have already stopped by 19 Jan when the image was taken. Most likely, the new land addition will be eroded within months, because it seems mainly to be composed of loose materials, as opposed to more resistant solid lava flows. [mehr]
Eruption between Hunga Tonga and Hunga Ha’apai island on 15 Jan (New Zealand High Commission)
Freitag, Jan 16, 2015
A new island is now growing at the eruption site between Hunga Ha’apai and Hunga Tonga Islands. As of yesterday, it had an east-west elongated 1.5-2 km long and approx. 1 km wide shape with a half-open cone around the crater reaching almost 100 m in height already. ... [mehr]
 

Hunga Tonga-Hunga Ha'apai Vulkan

Submarine volcano 149 m / 489 ft
Tonga, Tonga Islands, -20.57°S / -175.38°W
Aktueller Status: normal / ruhend (1 von 5) | Reports
Hunga Tonga-Hunga Ha'apai Vulkan-B cher
Last update: 29 Mai 2016 (eruption ended mid Jan 2015)
Typische Aktivität: unspecified
Ausbrüche des Hunga Tonga-Hunga Ha'apai: 2009  No recent earthquakes
UhrzeitMag. / TiefeDistanceOrt
The small islands of Hunga Tonga and Hunga Ha'apai cap a large seamount located about 30 km SSE of Falcon Island, approximately 65 km NW of Vuna Wharf, Nuku’alofa, and 70 km SW of Nomuka Island.

Beschreibung:

The two linear andesitic islands are about 2 km long and represent the western and northern remnants of the rim of a largely submarine caldera lying east and south of the islands. Hunga Tonga and Hunga Ha'apai reach an elevation of only 149 m and 128 m above sea level, respectively, and display inward-facing sea cliffs with lava and tephra layers dipping gently away from the submarine caldera. A rocky shoal 3.2 km SE of Hunga Ha'apai and 3 km south of Hunga Tonga marks the most prominent historically active vent. Several submarine eruptions have occurred at Hunga Tonga-Hunga Ha'apai since the first historical eruption in 1912.
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Smithsonian / GVP volcano information


Letzte Satellitenbilder

 

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