Updated seafloor topography and T phase seismicity at Monowai, northern Kermadec Arc

Metz, Dirk, Watts, Anthony B., Grevemeyer, Ingo, Werner, Reinhard and Huusmann, Hannes (2019) Updated seafloor topography and T phase seismicity at Monowai, northern Kermadec Arc New Zealand Journal of Geology and Geophysics . DOI 10.1080/00288306.2019.1651747.

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Abstract

Monowai is an active submarine volcanic centre in the Kermadec Arc, Southwest Pacific Ocean. Multi-beam data acquired during expedition SO225 aboard R/V SONNE in December 2012 indicates that the topography of the main stratocone has evolved significantly since the last survey in June 2011. Bathymetric measurements of the edifice reveal differences of up to 42 m in seafloor depth and indicate a net volume increase of ∼0.037 km3 across the summit area. Explosive volcanism observed onsite during the SO225 mapping campaign could be linked to a 20h-long swarm of unusually coherent T phase arrivals, suggesting that Monowai is a prime source of broadband seismic noise in the Southwest Pacific region during times of activity. Our findings further document the dynamic nature of volcanic processes at Monowai and have implications for future expedition planning.

Document Type: Article
Keywords: Monowai, Kermadec Arc, submarine eruption, submarine volcano, T phase, SO225
Research affiliation: OceanRep > GEOMAR > ZE Central Facilities > ZE-TLZ Technical and Logistics
JAMSTEC
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Refereed: Yes
DOI etc.: 10.1080/00288306.2019.1651747
ISSN: 0028-8306
Projects: MANIHIKI II
Expeditions/Models:
Date Deposited: 12 Aug 2019 11:56
Last Modified: 13 Aug 2019 13:03
URI: http://eprints.uni-kiel.de/id/eprint/47456

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