Havre Seamount

sopka – Stratovolcano, New Zealand, Tonga-Kermadec Volcanic Regions

Kde

New Zealand, Tonga-Kermadec Volcanic Regions

Typ (GVP)

Stratovolcano

Nadmořská výška

-897 m

Tektonické prostředí

Subduction zone / Oceanic crust (< 15 km)

Poslední známá erupce

2012

Poloha

-31,080°, -179,033°

Havre Seamount has a caldera capping a 1-km-high edifice. Located on the Kermadec Ridge, it is believed to have erupted in July 2012, the first recorded activity. The caldera has an asymmetric morphology with the N rim comprising mostly a single inner topographic wall, and the S rim comprising both an outer topographic rim and inner wall separated by a 1.1-1.4 km wide terrace. Smaller craters occur on this terrace. Rocks from the caldera wall include aphyric and plagioclase-bearing basalt-andesite, aphyric and plagioclase- and pyroxene-bearing dacite, gabbro, diorite, and pumice (Wright et al., 2006).

Text: Smithsonian Global Volcanism Program.

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