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Tongariro volcano eruptions

complex volcano 1978 m / 6,490 ft
North Island, New Zealand, -39.12°S / 175.65°E
Eruption list: Eruptions outside Ngauruhoe, mainly on SSE flank (Red Crater): 6 Aug 2012, 1927 (?), 1926, 1896, 1890 (?), 1886, 1885±1, 1869, 1859, 1855, 1500 ± 50, 550 BC ± 200 years, 9350 BC (?), 9450 BC (?), 9650 BC (?), 9850 BC (?)
Eruptions from Ngauruhoe vent: 1975-77, 1972, 1968-69, 1962, 1958-59, 1956, 1948-54, 1939-40, 1937, 1934, 1931, 1924-28, 1917, 1913-14, 1909-10, 1904-07, 1897-98, 1892, 1883, 1881, 1878, 1875, 1869-70, 1862-64, 1857, 1844, 1841, 1839, 550 BC ± 200


6 August 2012 eruption

Infrared image of the ash cloud from the eruption of Tongariro (www.stuff.co.nz)
Infrared image of the ash cloud from the eruption of Tongariro (www.stuff.co.nz)
A brief but violent phreatic eruption occurred at 23:50 local time on 6 August from new vents near the Te Mari crater of Tongariro.
The explosion followed several weeks of increased earthquakes under the volcano. It produced a 7 km tall ash plume and threw ballistic blocks of up to 1 m diameter to 1.5-2 km distance.

An interesting news article with eyewitness accounts and other information: First Tongariro eruption in over 100 years
[more]
Sun, 23 Aug 2015, 11:05

Tongariro volcano (New Zealand): alert level lowered back to green

On 19 August GeoNet reported that activity at Tongariro's Te Maari Craters had declined significantly since the eruption in 2012, with data suggesting that unrest associated with the eruption was over. Read all
Wed, 19 Aug 2015, 06:00

Tongariro volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 19 August-25 August 2015 (Continuing Activity)

On 19 August GeoNet reported that activity at Tongariro's Te Maari Craters had declined significantly since the eruption in 2012, with data suggesting that unrest associated with the eruption was over. The Volcanic Alert Level was lowered to 0 (on a scale of 0-5). The Volcanic Alert Level for Ngauruhoe is separate and had been lowered to 0 on 20 April. ... Read all
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