The 2015 Surtseyan Eruption of Hunga Haapai-Hunga Tonga,South Pacific
A month-long eruption from mid-December 2014 built an emergent tuff-cone island, between the existing islets of Hunga Tonga and Hunga Haapai, 65 km NW of the capital of Tonga. The Hunga volcano is one of several historically active, shallow submarine to emergent volcanoes regularly spaced along the Tonga volcanic arc. Syn-eruptive photos and videos, along with visiting the new subaerial pyroclastic cone provided a rare opportunity to investigate models of emergent volcanism and sample the latest magma of the Tongan arc. Rapid coastal and surface-runoff erosion redistributed tuff to rapidly reshape the newly formed volcanic cone to form beaches allowing landing on the island. The first notice of this eruption was 19 December 2014, with steam-rich plumes first seen from Nukualofa on 30 December 2014. A 6-km high eruption was noted on 12 January 2015, leading to several days of flight cancellations. At this stage vigorous hydromagmatic eruptions were witnessed at close hand, with the production of a new island well in progress. On 17 January 2015, steam plumes were ＞10 km and by 24 January, the eruption was over.
Shane J. Cronin Manuela Tost Marco Brenna Simon Barker Murray Ford Ian Smith Sisi Tongaonevai Taaniela Kula
School of Environment, University of Auckland, Auckland, New Zealand Geology Unit, Natural Resources Division, Ministry of Lands and Natural Resources, Nukualofa, Tonga
国际会议
The 6th International Maar Conference(IMC)(第六届国际玛珥会议)
长春
英文
29-29
2016-07-30（万方平台首次上网日期，不代表论文的发表时间）