气候变化领域集成服务门户(CCPortal): Temporal Magnetotellurics Reveals Mechanics of the 2012 Mount Tongariro; NZ; Eruption

CCPortal

DOI	10.1029/2019GL086429
	Temporal Magnetotellurics Reveals Mechanics of the 2012 Mount Tongariro; NZ; Eruption
	Hill G.J.; Bibby H.M.; Peacock J.; Wallin E.L.; Ogawa Y.; Caricchi L.; Keys H.; Bennie S.L.; Avram Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:8
英文摘要	Monitoring dynamics of volcanic eruptions with geophysics is challenging. In August and November 2012, two small eruptions from Mount Tongariro provided a unique opportunity to image subsurface changes caused by the eruptions. A detailed magnetotelluric survey of the Tongariro volcanic complex completed prior to the eruption (2008–2010) provides the preeruption structure of the magmatic system. A subset of the initial measurement locations was reoccupied in June 2013. Significant changes were observed in phase tensor data at sites close to the eruptive center. Although subsurface electrical resistivity changed, the geometry of the preeruptive reservoir did not. These subsurface resistivity variations are interpreted as being predominantly caused by interaction of partial melt and the overlying brine layer causing volume reduction of the brine layer through phreatic eruption. The ability to detect significant changes associated with the magma reservoir suggests that magnetotellurics can be a valuable volcano monitoring tool. © 2020. The Authors.
英文关键词	Volcanoes; Magma reservoirs; Magmatic systems; Magnetotelluric surveys; Measurement locations; Resistivity variation; Volcanic eruptions; Volcano monitoring; Volume reductions; Magnetotellurics; electrical resistivity; magma chamber; magnetotelluric method; reservoir; volcanic eruption; volcano; Manawatu-Wanganui; Mount Tongariro; New Zealand; North Island
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170444
作者单位	Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic; Gateway Antarctica, University of Canterbury, Christchurch, New Zealand; GNS Science, Lower Hutt, New Zealand; United States Geological Survey, Menlo Park, CA, United States; United States Army Corps of Engineers, Huntsville, AL, United States; Volcanic Fluid Research Centre, Tokyo Institute of Technology, Tokyo, Japan; Department of Earth Sciences, University of Geneva, Geneva, Switzerland; Department of Conservation, Turangi, New Zealand; Phoenix Geophysics, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Hill G.J.,Bibby H.M.,Peacock J.,et al. Temporal Magnetotellurics Reveals Mechanics of the 2012 Mount Tongariro; NZ; Eruption[J],2020,47(8).
APA	Hill G.J..,Bibby H.M..,Peacock J..,Wallin E.L..,Ogawa Y..,...&Avram Y..(2020).Temporal Magnetotellurics Reveals Mechanics of the 2012 Mount Tongariro; NZ; Eruption.Geophysical Research Letters,47(8).
MLA	Hill G.J.,et al."Temporal Magnetotellurics Reveals Mechanics of the 2012 Mount Tongariro; NZ; Eruption".Geophysical Research Letters 47.8(2020).