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News
Mount Tarawera seismograph drum showing the earthquakes (GeoNet)
Friday, Jan 16, 2015
A swarm of small earthquakes occurred during 14-15 Jan near Lake Rotomahana. ... [more]
 

Okataina (Tarawera) volcano

Lava domes 1111 m / 3,645 ft
New Zealand, -38.12°S / 176.5°E
Current status: normal or dormant (1 out of 5) | Reports
Okataina (Tarawera) volcano books
Last update: 26 Mar 2019
Typical eruption style: unspecified
Okataina (Tarawera) volcano eruptions: 1981, 1886 (Tarawera eruption)
TimeMag. / DepthDistanceLocation
Wed, 9 Oct 2019
Wed, 9 Oct 19:02 UTCM 1.7 / 5 km18 kmNew Zealand
Sun, 6 Oct 2019
Sun, 6 Oct 09:27 UTCM 2.1 / 2 km20 kmNew Zealand
Fri, 4 Oct 2019
Fri, 4 Oct 09:51 UTCM 1.6 / 5.4 km16 kmNew Zealand
Fri, 4 Oct 09:47 UTCM 1.5 / 5 km16 kmNew Zealand
Thu, 3 Oct 2019
Thu, 3 Oct 12:33 UTCM 1.7 / 15.1 km19 kmNew Zealand
View all recent quakes
Mount Tarawera, located 24 km SE of Rotorua, is the main vent of the Okataina volcanic complex. Tarawera produced one of New Zealand's largest historic eruptions in 1886, when a violent explosive basaltic eruption occurred that killed an estimated 120 people. The fissures that opened up run for about 17 kilometres northeast-southwest.

Background:

The massive, dominantly rhyolitic Okataina Volcanic Centre is surrounded by extensive ignimbrite and pyroclastic sheets produced during multiple caldera-forming eruptions. Numerous lava domes and craters erupted from two subparallel NE-SW-trending vent lineations form the Haroharo and Tarawera volcanic complexes.
Lava domes of the Haroharo complex, at the northern end of the Okataina Volcanic Centre, occupy part of the 16 x 26 km Pleistocene Haroharo caldera, which formed incrementally between 300,000 and 50,000 years before present (BP). The oldest exposed rocks on the caldera floor are about 22,000 years old. The Tarawera complex at the southern end of Okataina consists of 11 rhyolitic lava domes and associated lava flows. The oldest domes were formed as late as about 15,000 years BP, and the youngest were formed in the Kaharoa eruption about 800 years BP. The NE-SW Tarawera vent lineation extends from the two dacitic cones of Maungaongaonga and Mangakakaramea on the SW to Mount Edgecumbe on the NE. Construction of the Haroharo and Tarawera complexes impounded lakes Rotoiti, Totoehu, Okataina, and Tarawera against the outer margins of the Okataina ring structure. A major hydrothermal area is located at Waimangu; the world-renowned Pink and White Terrace siliceous sinter deposits were destroyed during the major basaltic explosive eruption of 1886.
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Smithsonian / GVP volcano information


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