Number of the records: 1
Temporal Magnetotellurics Reveals Mechanics of the 2012 Mount Tongariro, NZ, Eruption
- 1.
SYSNO ASEP 0525107 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Temporal Magnetotellurics Reveals Mechanics of the 2012 Mount Tongariro, NZ, Eruption Author(s) Hill, Graham J. (GFU-E) ORCID
Bibby, H. M. (NZ)
Peacock, J. (US)
Wallin, E. L. (US)
Ogawa, Y. (JP)
Caricchi, L. (CH)
Keys, H. (NZ)
Bennie, S. L. (NZ)
Avram, Y. (CA)Article number e2019GL086429 Source Title Geophysical Research Letters. - : Wiley - ISSN 0094-8276
Roč. 47, č. 8 (2020)Number of pages 9 s. Publication form Print - P Language eng - English Country US - United States Keywords magnetotellurics ; Taupo Volcanic Zone ; eruption dynamics ; Tongariro Subject RIV DE - Earth Magnetism, Geodesy, Geography OECD category Geology Method of publishing Open access Institutional support GFU-E - RVO:67985530 UT WOS 000530332600006 EID SCOPUS 85083989224 DOI 10.1029/2019GL086429 Annotation 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. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2021 Electronic address https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL086429
Number of the records: 1