Depressurization of a hydrothermal system following the August and November 2012 Te Maari eruptions of Tongariro, New Zealand
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- I. J. Hamling
- GNS Science Lower Hutt New Zealand
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- C. A. Williams
- GNS Science Lower Hutt New Zealand
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- S. Hreinsdóttir
- GNS Science Lower Hutt New Zealand
書誌事項
- 公開日
- 2016-01-14
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- http://doi.wiley.com/10.1002/tdm_license_1.1
- DOI
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- 10.1002/2015gl067264
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:title>Abstract</jats:title> <jats:p> In 2012, two phreatic eruptions occurred at New Zealand's Tongariro volcano for the first time in over a century. Interferometric Synthetic Aperture Radar data collected by the Italian Space Agency's COSMO‐SkyMed satellite constellation, indicates up to 20 mm/yr of post eruptive subsidence focused across a 4 km <jats:sup>2</jats:sup> region in the vicinity of the eruption site. Modeling of the deformation data indicates a shallow source at ∼500 m depth (1100 m asl) consistent with the depth of the hydrothermal system. We estimate an annual volume loss of 35,000 m <jats:sup>3</jats:sup> , leading to a pressure loss of ∼0.09 MPa/yr. We suggest that fracturing associated with the eruptions has enabled the continued depressurization of the shallow hydrothermal system and that subsidence will continue until the fractures become resealed. </jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 43 (1), 168-175, 2016-01-14
American Geophysical Union (AGU)